Re: [Elecraft] The next generation KAT500

[Larry Phipps]

Funny you should say that, Andy ;-) Before LP-100 was a wattmeter, the 
basic circuit was used by me to tune the DE and reflector of a mini-beam 
project that I was working on at the time.


Regards,
Larry N8LP




Message: 3
Date: Thu, 8 Jul 2021 23:34:52 +
From: Andy Durbin 
To: "elecraft@mailman.qth.net" 
Subject: [Elecraft] The next generation KAT500
Message-ID:



Content-Type: text/plain; charset="iso-8859-1"

The next generation KAT500 should measure the complex load impedance, including 
the sign of X, compute the L and C required to match, and plug in those values 
as the initial tuning solution.  Why wouldn't this approach be better than 
flailing around in the dark like most auto tuners seem to do?

I doubt this will ever happen but the idea of combining the KAT500, LP-100A, and an 
Arduino controller to implement this "smart" tuner keeps banging around in my 
head.   Maybe one day I'll give it a try.

73,
Andy, k3wyc




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Re: [Elecraft] Issue 12 re Astron Power Supply

[Larry Phipps]

I think you'll find that many of today's transceivers DO NOT have a low 
resistance connection between the negative supply lead and chassis.


Larry N8LP



On 4/17/2018 5:37 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 10
Date: Mon, 16 Apr 2018 22:39:44 -0700
From: Alan
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Issue 12 re Astron Power Supply
Message-ID:<9141e52a-a64f-5174-1889-1e31ef365...@sonic.net>
Content-Type: text/plain; charset=utf-8; format=flowed

You're right.  If all the devices run from the same 12V power supply and
they are all bonded together, then there is nothing to prevent some of
the transceiver return current flowing in the negative power supply
leads of the other devices.  Hopefully the transceiver power leads use
much heavier wire so most of the current will flow in them.  And if the
plus and minus leads are close together and tightly twisted then that
should reduce hum and noise coupling.

Ideally every device would have its own 12V power supply, each with
floating ground.  Then there would be no "ground loop".  (Sorry Jim, I
know you don't like that term.)

Alan N1AL


On 04/16/2018 10:22 PM, Vic Rosenthal wrote:

But I keep coming back to this: almost every device connected to the power 
supply has V- connected to ground internally. So if you have, say, a keyer and 
a transceiver running off the same supply, won?t some of the transceiver?s 
current flow through the V- line to the keyer, to the case of the keyer via the 
internal connection, to the station bonding, to the transceiver case and thence 
to the transceiver V- input?

In short, don?t the accessories fed from the same PS as the transceiver do 
exactly the same thing as the notorious black wire in the Astron?

Vic 4X6GP


On 16 Apr 2018, at 23:50, Jim Brown  wrote:

Joe is right and George is WRONG.  V- is NOT GROUND, it is the return for DC 
power.  Bonding V- to ground is a BAD idea -- that's why virtually all 
pro-grade power supplies are built either without the bond or so that the bond 
can easily be removed.

As to those who were confused by my advice -- I thought it was pretty plain.

Quite a few posts back, I posted a link to a detailed discussion of this on my 
website. I published this around 2010-12. I urge those who are confused to 
study it.

http://k9yc.com/PowerSupplyBondingAndAudioDistortion.pdf

My detailed advice on station grounding and bonding is the link below.  Much of 
it has been incorporated in Ward Silver's recent ARRL book on the topic, and is 
referenced in the book. You can buy the book from ARRL, while the pdf on my 
website is free. :)  Joe and Don are right on in their understanding of the 
NEC, the fundamentals of which I have been paid to teach to audio/video 
professionals in workshops at conventions.

http://k9yc.com/GroundingAndAudio.pdf

73, Jim K9YC


On 4/16/2018 7:06 AM, Joe Subich, W4TV wrote:

On 2018-04-16 9:28 AM, George Danner wrote:

Re-Connect it!

DON'T CONNECT THAT WIRE BETWEEN V- AND CHASSIS CASE!

Unless you have a substantial*EXTERNAL GROUND CONNECTION*
between your station ground and the electrical system ground
rod, that connection between V- and chassis will bridge the
power system "safety" ground and the station grounding and
put your delicate and expensive equipment between two "grounds"
that can separate by many hundreds of volts in a lightning
event (or equipment failure).


We even used ring grounds around studio & transmitter building with
ground rods every 10' all cad-welded.

That is proper grounding and bonds all entry points together*OUTSIDE*
the building to prevent grounds from separating.  It creates a common
"island" for everything inside the building.  However, for the majority
of amateur stations which fail to properly bond the shields of all of
the coaxial cables entering the shack to the electrical system ground
*at the meter*, there is no "island" ... more like an isthmus across
the equipment.

73,

 ... Joe, W4TV



On 2018-04-16 9:28 AM, George Danner wrote:
Re-Connect it!


  From a broadcaster (AM,FM & TV) was in South Florida (lightning capital of

North America).

The more massive the common (ground, bonding, whatever term you use) for the 
connection between equipment and the power company ground connection the better.
We even used ring grounds around studio & transmitter building with ground rods 
every 10' all cad-welded. This is probably over kill for a ham station; but think 
as massive as you can.
Towers at 500' or above had 2 ring grounds and lots of ground rods.

The common for equipment interconnection is for safety first and the reduction 
of voltage drops on the common lines that can transfer from one piece of 
equipment to another (us old timers use the term ground loop - not PC any more).

73 George AI4VZ

-Original Message- From: Charlie T

"This greatly increases the chances for damages to station equipment and all other 
electronic equipment in the 

Re: [Elecraft] SVGA monitor for P3

[Larry Phipps]

Actually, Don, there is a text decode window available in NaP3 for the 
K3 or KX3, and it's independently movable and sizable.


Larry N8LP



On 12/28/2016 10:04 PM, elecraft-requ...@mailman.qth.net wrote:

-Original Message-
From: Don Wilhelm [mailto:donw...@embarqmail.com]
Sent: Wednesday, December 28, 2016 10:40 AM
To: Jeff Griffin; 'Elecraft Reflector'
Subject: Re: [Elecraft] SVGA monitor for P3

Jeff,

For about the same price as a VGA capture device, you may want to consider
an LP-Pan2.  Connect it to the P3 IF out and connect LP-Pan2 to a good
quality soundcard.
Running NaP3 or Win4K3 on the computer will give you a panadapter display in
a resizable window.

The text decode area of the SVGA display will not be present, but then I do
not know what you want to see from the SVGA option.

73,
Don W3FPR


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Re: [Elecraft] LP Bridge crashes with K3

[Larry Phipps]

The largest option that they offer for both xmt and rcv buffers.

Larry


On 12/7/2016 7:34 PM, elecraft-requ...@mailman.qth.net wrote:

Subject: Re: [Elecraft] LP Bridge crashes with K3
>Date: Sun, 04 Dec 2016 18:43:53 -0500
>From: George Kidder<gkid...@ilstu.edu>
>Reply-To:gkid...@ilstu.edu
>To:elecraft@mailman.qth.net
>
>
>
>No I have not, Larry.  What settings do you recommend for starters?
>
>George
>
>
>On 12/4/2016 11:02 AM, Larry Phipps wrote:
>

>>Have you tried adjusting the buffer settings in Device Mgr for your
>>serial port?
>>
>>Larry N8LP


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Re: [Elecraft] LP Bridge crashes with K3

[Larry Phipps]

Have you tried adjusting the buffer settings in Device Mgr for your 
serial port?


Larry N8LP

Date: Sat, 3 Dec 2016 09:33:33 -0500
From: George Kidder
To: 'Elecraft Reflector'
Subject: [Elecraft] LP Bridge crashes with K3
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed

OK, gang!  I've tried everything I can think of, and am now looking for
some additional thoughts.

Equipment: K3 (unmodified) with firmware 5.53, computer (2.99 GHz dual
core, 4 GB memory) running Win 7, LP-Bridge (LPB) set for 200 mS delay.
The computer is not connected to the internet, and all programs are
brought in from another computer using a flash drive.

Problem:  At random but long intervals (hours) LP-Bridge crashes,
displaying error 13 (type mismatch).  Clearing this window causes
program to close.  This behavior is seen with no external programs
connected to LPB, and with LPB set to any polling rate from 200 mS
(default) to as much as 1000 mS.  It is seen when LPB2 is used and the
baud rate is reduced to 4800.  When the crash occurs, the error seems to
be in a response from the K3 - for instance, the "Rig Received Text"
window shows "IS 0|00;" while it should show "IS 0600;".  In this case
the K3 was set to CW mode.  In LSB mode, the same window shows "CW 6+;"
where I presume it should have been "CW 60;".  This damaged text shows
up in all windows (Rig received, K3 Com port, Power SCR-IF Aux CAT port,
etc.)

Attempted resolution includes reloading the K3 firmware and reloading
LPB from the website after clearing out all remnants of the old
program.  Nothing helps - LPB still crashes when allowed to run for
several hours.  Other programs not affected.  Computer is on a UPS, so
momentary power outage would not be a cause (even if there should be one
every night!)

Clearly, there is a communication failure between the K3 and LPB, since
it occurs with nothing else connected.  Is the problem with the K3, LBP
or the Win 7 operating system which sits between them?  And what more
can I try to fix it?

Your thoughts will be greatly appreciated.

George, W3HBM


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Re: [Elecraft] Lp.pan & k3s

[Larry Phipps]

Is your LP-PAN 2 set up for K3, ie. does it have the correct xtal?

Larry N8LP



On 9/26/2016 11:52 AM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 24 Sep 2016 14:14:39 -0700 (MST)
From: MaverickNH
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Lp.pan & k3s
Message-ID:<1474751679802-7622838.p...@n2.nabble.com>
Content-Type: text/plain; charset=us-ascii

As an added note, I've looked to adjust Line In Levels on the Xonar U7 as per
http://www.telepostinc.com/soundcards.html  using the Digital Level Meter
app. I find that the Elecraft Signal Generator XG3 -73dBm 14.02000 MHz
signal shows on my P3 as a -81 dB peak on CW (and I hear it on the K3S
headphones), but I find no change in turning the XG3 On/OFF while adjusting
the full range of Line In Level on the U7 sound card (dB ranges -33.3 to -27
with or without XG3 signal).

If I switch my PC to the U7, I can hear YouTube videos, so I think my U7 is
OK.  If I run from IF Out on the K3S rather than the P3, still no success,
so the P3 IF Out appears to not be the issue.

Might be the LP-PAN 2 not be working?

I'm only more mystified...

Bret/N4SRN


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Re: [Elecraft] Skimmer and the K3S

[Larry Phipps]

Running Router and LP-Bridge should not be a problem at all if Router is 
properly configured. I ran this setup for a long time. Make sure you're 
not asking both programs to create or use the same port. Also, make sure 
both are using the latest major software release from Eltima (LPB and 
Router both use Eltima drivers). I think it's 8.xx. Doesn't matter what 
the minor revision levels are. Sometime Router can be picky about which 
program was installed last because of pointers to the drivers. If you 
installed LPB last, try reinstalling Router again.


I think the other issues have been well covered by others contributing 
to this thread.


Sorry for the delayed response. I get the Digest version of the 
reflector delivered a couple times a day.


73,
Larry N8LP


On 9/4/2016 2:28 AM, elecraft-requ...@mailman.qth.net wrote:

Message: 12
Date: Sat, 3 Sep 2016 09:51:11 -0500
From: Kevin
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Skimmer and the K3S
Message-ID:
Content-Type: text/plain; charset=windows-1252; format=flowed

Should read... Having them on most assuredly will.


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Re: [Elecraft] 75 ohm cable on Buffered I.F. Output?

[Larry Phipps]

No, as long as the cable is well shielded and the connectors fit well.

Larry N8LP



On 1/16/2016 4:06 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Fri, 15 Jan 2016 20:15:32 -0500
From: Bert Rollen
To:
Subject: [Elecraft] 75 ohm cable on Buffered I.F. Output?
Message-ID:
Content-Type: text/plain; charset="us-ascii"

All,

  


I am setting up a LP-PAN with my K3.

  


Will I cause much problem by using a 75 ohm jumper on the IF ?  (I happen to
have several fairly nice 24" Belden 8263 BNC jumpers on hand).

  

  


Thanks,

  


Bert

  


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Re: [Elecraft] Elecraft Digest, Vol 140, Issue 19

[Larry Phipps]

I you always use LP-Bridge and have a spare serial port, you can feed 
the amp directly from one of the LP-Bridge Output ports. The protocol is 
Kenwood, 4800 baud.


Larry



On 12/13/2015 2:35 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Sun, 13 Dec 2015 09:52:46 -0600
From:char...@k5ua.com
To:elecraft@mailman.qth.net
Subject: [Elecraft] K3S RS232 "Y" Connector causing port conflict
Message-ID:<2cd485a3bb5be9207d62cfc6cd706...@k5ua.com>
Content-Type: text/plain; charset=US-ASCII

  


I have an OM2500A amp that works perfectly with my K3S when it is the
only thing connected to the RS232 of my K3S.

I am using LP-Bridge and Na3P to create a panadapter and this works
perfectly when the computer is the only thing connected to the RS232 of
my K3S.

The manual shows how to use a RS232 "Y" splitter so that two devices can
share the RS232 port of the K3S, but when I use the "Y" splitter (one
side to the OM2500A amp and one side to the computer) the following
malfunctions occur:

1. The OM2500A display rapidly changes from the correct VFO frequency to
an out-of-band frequency over 2 Mhz away.
2. The pandapter frequency readout ceases to function.

I assume there is a port conflict, and I wonder if anyone knows the
correct pin-out of the RS232 line to the OM amp so that it will be a
passive listener on the DB9 cable?

Thanks,

Charles K5UA


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Re: [Elecraft] K2 and NaP3 IF offset values

[Larry Phipps]

The K2 changes the LO injection from high side to low side above 17m. 
Early versions of NaP3 and PowerSDR/IF  had an option box that allowed 
the user to enter a frequency for K2 (and for K3) which reverses the 
sidebands at a specified frequency, but later versions should do this 
automatically at the correct frequency. I'm not sure which version 
you're using, and I haven't used my K2 with LP-PAN since I got a K3, so 
maybe there's a bug in some of the newer versions.


Larry N8LP




On 11/14/2015 11:31 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 14 Nov 2015 09:15:43 -0700 (MST)
From: K8AC
To:elecraft@mailman.qth.net
Subject: [Elecraft] K2 and NaP3 IF offset values
Message-ID:<1447517743616-7610348.p...@n2.nabble.com>
Content-Type: text/plain; charset=us-ascii

I've been using my K2 with LP-Pan and NaP3 for a few months on the lower
bands and just recently got on 20 and 15 meter CW with it.  I found 
that the

offsets you specify in NaP3 were considerably different on 15, 12 and 10
meters while that for 20M was just a bit off from the lower bands.  17M
offset was the same as the lower bands.  For example, the global offset
required on 80, 40 and 30M is 1170 in my case.  For 20M, it's 1200.  
For 15M

it's (-285) and (-330) for 10M.

When I say the "offset required", that means the value I need to 
specify in

order for the NaP3 center frequency indicator line to be exactly in the
middle of a received CW signal.

Not quite sure why the offset difference - obviously the IF signal is 
not

exactly the same for all bands, but why not?




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Re: [Elecraft] K2 and NaP3 IF offset values

[Larry Phipps]

The K2 changes the LO injection from high side to low side above 17m. 
Early versions of NaP3 and PowerSDR/IF  had an option box that allowed 
the user to enter a frequency for K2 (and for K3) which reverses the 
sidebands at a specified frequency, but later versions should do this 
automatically at the correct frequency. I'm not sure which version 
you're using, and I haven't used my K2 with LP-PAN since I got a K3, so 
maybe there's a bug in some of the newer versions.


Larry N8LP



On 11/14/2015 11:31 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 14 Nov 2015 09:15:43 -0700 (MST)
From: K8AC
To:elecraft@mailman.qth.net
Subject: [Elecraft] K2 and NaP3 IF offset values
Message-ID:<1447517743616-7610348.p...@n2.nabble.com>
Content-Type: text/plain; charset=us-ascii

I've been using my K2 with LP-Pan and NaP3 for a few months on the lower
bands and just recently got on 20 and 15 meter CW with it.  I found that the
offsets you specify in NaP3 were considerably different on 15, 12 and 10
meters while that for 20M was just a bit off from the lower bands.  17M
offset was the same as the lower bands.  For example, the global offset
required on 80, 40 and 30M is 1170 in my case.  For 20M, it's 1200.  For 15M
it's (-285) and (-330) for 10M.

When I say the "offset required", that means the value I need to specify in
order for the NaP3 center frequency indicator line to be exactly in the
middle of a received CW signal.

Not quite sure why the offset difference - obviously the IF signal is not
exactly the same for all bands, but why not?


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Re: [Elecraft] LP-PAN 2 and P3

[Larry Phipps]

Only one program can connect directly to a serial device like the K3. 
You need to use a port sharing app like LP-Bridge or several others out 
there to allow this to happen. LP-Bridge in this case connects to the 
K3, and lets you create "virtual" ports for the SDR program, loggers, 
etc. That way, each program thinks it's talking directly to the K3, but 
in fact the virtual port traffic is routed and sequenced within the app 
to get access to the K3 as needed.


Here's a link to my LP-Bridge web page...
http://www.telepostinc.com/LPB.html

Larry N8LP



On 10/15/2015 6:10 AM, elecraft-requ...@mailman.qth.net wrote:

Message: 24
Date: Thu, 15 Oct 2015 06:10:13 -0400
From: "David Smith"
To:
Subject: Re: [Elecraft] LP-PAN 2 and P3
Message-ID:<01d10731$aeae5e70$0c0b1b50$@harlanonline.net>
Content-Type: text/plain;   charset="iso-8859-1"

I have an additional question in addition to Jorge.  I recently installed my
LPAN2 (I do not have a P3).

My question is that can I run my LPAN2 at the same time I run N1MM+.   I
tried and got a port conflict the with K3.  Also, I run SO2R with 2 K3s and
never made it that far to check additional port conflicts as I didn't make
it past the first port conflict.

Any comments appreciated.

David, ND4Y


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Re: [Elecraft] Windows 10 and LP-Bridge

[Larry Phipps]

LP-Bridge should run fine under W10. We were running LP-Bridge under W10 
at our booth at Dayton along with NaP3 and CW Skimmer. It is true that 
LP-Bridge does not support Unicode, which is mainly an issue with newer 
versions of HRD which now use Unicode. I haven't heard any feedback 
about Unicode incompatibilities from users other than HRD. We have a 
warning at the top of our LP-Bridge web page about HRD / Unicode. I will 
add other programs to the warning if I know what they are. Unicode 
support is on our to do list, but there are other things higher in the 
queue.


Larry N8LP



On 10/12/2015 9:54 AM, elecraft-requ...@mailman.qth.net wrote:

Date: Sun, 11 Oct 2015 23:49:22 +0100
From: "Robin Moseley"
To: "James Bennett",  
Cc:
Subject: Re: [Elecraft] Windows 10 and LP-Bridge
Message-ID:
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

it does not do unicode, so is not supported by many of the newer programs,
Shame as it was a nice utility..

Robin G1MHU


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[Elecraft] Using K3 with CW Skimmer

[Larry Phipps]

The LP-PAN offset is nominal 6000 Hz, but it typically runs at about 
6100-6150 Hz. This value is entered in the NaP3 Global Offset box as a 
negative value, ie. -6000. The LP-PAN LO is 32836/4=8209 kHz. The K3 IF 
center is nominal 8215 kHz, a difference of 6000 Hz.


The Skimmer Audio IF, Hz  value can be calculated from the following 
formula on our CW Skimmer help page...


*K3 CW Sidetone Pitch + LP-PAN Global Offset = Audio IF, Hz
*
For example… 600 + (-6000) = -5400

You can walk it in from there. ALso, unlike NaP3, Skimmer does not 
adjust for filter offsets or DSP shift settings on the K3, so it is best 
to do this with the Shift/Width controls centered. The value will vary 
from filter to filter unless all your CW filters are 8-pole.


73,
Larry N8LP




On 2/5/2015 11:25 AM, elecraft-requ...@mailman.qth.net wrote:

Date: Thu, 5 Feb 2015 07:46:42 +
From: Ken Chandlerg0...@sky.com
To: iain macdonnell - N6MLa...@dseven.org
Cc: Elecraft Reflectorelecraft@mailman.qth.net
Subject: Re: [Elecraft] Using K3 with CW Skimmer
Message-ID:51ccb0f8-7714-4bc6-991d-b71d03272...@sky.com
Content-Type: text/plain;   charset=us-ascii

I'm seeing differently too.
On HF running skimmer, softrock if mode,  LP pan2, LP Bridge. EMU 202 card at 
192.
Running thru NaP3, I can see the pileup etc, and it's accurate, no tweeking of 
the offset done.
Bringing in CW skimmer I've had to retune offset to 5860, though I didn't do 
this on the recommended AM mode! Maybe I should have done!
Anyway I'm set now to within a few Hz of being on the button.
One thing which is a real pain is I cannot keep the emu open on the fast 2.0 
card, have looked at trying to keep the port alive when the PC, win7 pro, is 
powered down but not been successful.

Ken.. G0ORH

Sent from my iPad



On 4 Feb 2015, at 22:52, iain macdonnell - N6MLa...@dseven.org  wrote:

LP-Pan (except for very early models) offsets the IF by 6kHz, to move
any center-spikes introduced by audio interfaces out of the way. The
same offset applies to all bands, except on 6m, you need to swap I/Q
(there's an option in CW Skimmer for that) and make the offset
positive instead of negative, due to the IF being reversed on the K3
above 30MHz (or so). Not sure why you would be seeing different
behaviour on the lower bands.

73,

~iain / N6ML




On Wed, Feb 4, 2015 at 2:37 PM, Pete Smith N4ZRn...@contesting.com  wrote:
Update - I don't understand how or why, but if I set CW Skimmer's Audio IF
to -6150 Hz, that brings the K3 and CW Skimmer frequency readouts into
agreement.  There is an explanation of audio IF in the Skimmer help file,
but I can't get my brain around it.

73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.


On 2/4/2015 4:37 PM, Pete Smith N4ZR wrote:

I've been experimenting with using the K3 with CW Skimmer to work K1N. I'm
feeding LP-Pan 2 from the K3's IF, and running CW Skimmer if Softrock IF
mode.  I'm using Omnirig to read the K3s frequency and control it.  This
works super well at least down through 15 meters - I can see the first 10
KHz of the pileupabove K1N's transmit frequency, and see exactly where he
last worked someone.


However... I just tried the same technique on 30M, where K1N is currently
at 10113.1.  I can't see him or his pileup at and above that frequency, but
if I tune the radio down to 10107.9, ghe appears on the waterfall with the
expected humongous pileup over the next few KHz above.  So now I'm
wondering, is the relationship between IF frequency and dial frequency
perhaps different on the lower bands? Has anyone tried this same thing and
been able to make it work on 40 and below?


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Re: [Elecraft] [acom-list] Re: Elecraft K3 and ACOM 2000A

[Larry Phipps]

LP-Bridge blocks commands that it polls itself to eliminate redundancy. 
Especially with the K3, over-poling creates other problems. Since 
LP-Bridge defaults to poling for the most common commands, including VFO 
A and B frequencies, 5 times a second, I don't see how the amp can miss 
a response. The responses are being sent by the K3 5 times per second. 
There is something else going on. As a workaround, Nick, have you tried 
feeding the amp with one of the Output ports in LP-Bridge? These outputs 
only send VFO data, and only for the transmit VFO. It is set to Kenwood 
format and 4800 baud to be broadly compatible with amps, tuners and 
SteppIR. It also adds hysteresis to eliminate unnecessary retuning of 
SteppIR antennas near a segment edge.


Larry N8LP


On 9/14/2014 7:50 AM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 13 Sep 2014 13:26:29 -0400
From: Joe Subich, W4TVli...@subich.com
To: Nick - VE3EYnick.ve...@gmail.com, Dick Dievendorff
d...@elecraft.com
Cc: Elecraftelecraft@mailman.qth.net, ACOM group
acom-l...@yahoogroups.com
Subject: Re: [Elecraft] [acom-list] Re: Elecraft K3 and ACOM 2000A
Message-ID:54147e45.1000...@subich.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed



In my case LP-Bridge seems to be confusing the amp but I can't tell
why. LP-Bridge does read everything correctly from the K3 and
Win-Test works perfectly along with it.

LP-Bridge acts as a*proxy*  - polling from Win-Test and other programs
is answered by LP-Bridge and*not passed on to the rig*.  Thus, any
hardware that relies on the answers to polling from the rig does not
see any response.  Because LP-Pan blocks the majority of polls to the
rig, the 2000, SteppIR and other similar hardware never gets a chance
to recover when they miss an update as they would with a logger that
polls for frequency and mode two or three times per second.

73,

 ... Joe, W4TV


On 2014-09-13 12:59 PM, Nick - VE3EY wrote:

Hi Dick and Val
Thanks for sharing this valuable info with the group.

Similar to Bill, W6WRT after I fixed my CAT cable to exclude TXD line my
entire setup started working but later on I realized it wasn't working
reliably. On some occasions,  amp would not detect the frequency change
until after I started spinning the VFO knob.  This was while I had the
Win-Test logging program running and polling my K3.  Autonfo on my K3 is
set to nor.

On some bands the amp refused to follow the frequency.   For example, I
would switch the radio to 20 meters but the amp for some reason thought it
was still on 15.   If I turn the CAT off on the Acom's RCU unit and
transmit some RF, the amp would correctly switch to 20 and tune up.
Without changing anything else and while the K3 and Win-Test were still on
20m, if I turn the on the CAT on the RCU unit, the amp would jump back on
15m for some reason.

The whole thing started working reliably after I took LP Bridge out of the
picture.   In Win-Test if I define the radio on the real COM port the PC is
connected to the K3 and change the pooling from Auto to 300msec the amp
works well.   I changed the band numerous times and Acom followed without a
hitch.

In my case LP-Bridge seems to be confusing the amp but I can't tell why.
LP-Bridge does read everything correctly from the  K3 and Win-Test works
perfectly along with it.

73,  Nick
ve3ey


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Re: [Elecraft] N8LP Tuning Relay success

[Larry Phipps]

Thanks all for the help on this. I receive the Elecraft list in digest 
format, so there is a delay in seeing posts. Glad to see you're 
operational, Cary.


73,
Larry N8LP


On 7/24/2014 8:16 AM, elecraft-requ...@mailman.qth.net wrote:

Message: 19
Date: Wed, 23 Jul 2014 17:39:59 -0400
From: Hunsdon Cary IIIh3c...@gmail.com
To: Jim N7USj...@n7us.net,d...@elecraft.com
Cc:elecraft@mailman.qth.net, pete Lascellplasc...@verizon.net,
w4...@verizon.net, Hunt Caryhxc...@yahoo.com,   Sue A. Cary
suec...@mac.com
Subject: [Elecraft] N8LP Tuning Relay success
Message-ID:8a66e0b3-e58d-4bcf-badb-32b6b8f89...@gmail.com
Content-Type: text/plain;   charset=windows-1252

Dick, Jim,  Pete (W4WWQ):  
 Thanks for your help.  N8LP Tuning Relay now working as advertised.
The ?Interrupter? was key to getting it to work and once, with the help of Dick 
 Pete, I figured the phono plug on the K3 belonged on the Key Out jack and not 
the PTT jack,
it works perfectly.  As Dick explained, the KPA500 will not switch from Operate 
to Standby but there is no power output and no LED?s are lighting
up while the SteppIR is tuning - this is one slick little box!
  Again, thanks for your help!
73,
Cary, K4TM
Lynchburg VA

K3-100 #3448, KPA500 #0698, SteppIR 3-element @ 42'


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Re: [Elecraft] Problems with erratic USB/serial connection

[Larry Phipps]

Thanks for the info, Sal. Sounds like a nice find.

Larry N8LP



On 5/28/2014 12:00 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Wed, 28 May 2014 07:38:29 -0400
From: Slava Baytalskiysla...@nullserv.com
To: GDannergdan...@windstream.net
Cc:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Problems with erratic USB/serial connection
Message-ID:b81632e5-1155-46a8-aa6c-610921a4b...@nullserv.com
Content-Type: text/plain; charset=us-ascii

Hi all!
After seeing all the potential issues with various USB-to-SERIAL converters i 
decided to go a different route:
picked up this Gearmo 4-port dongle on Amazon for $48.
It uses an FTDI chipset and a single USB port gives me 4 DB9 RS232 ports.
It also seems to keep the COM port numbering constant.
Oh, and i'm using it on my MacBook Pro, running Windows 7 (32bit) in Parallels.
Works famously so far (been a few months now).
Hooked it up via the LP-Bridge program, and now i can turn the radio off (K3) 
without HRD crashing.
I'm only using 2 COM ports right now: one for the LP-Bridge/K3 and another for 
this ERC rotor ad--on card that i just assembled last weekend.
Brought my ancient CDE HAM IV control box into the 21st century.

Anyways, this Gearmo dongle seems like a really good alternative for Macs and 
PCs that don't have native RS232 ports.
Here's a link to where i got mine 
from:http://www.amazon.com/gp/product/B004ETDC8K/ref=oh_details_o04_s01_i01?ie=UTF8psc=1
Seems like the price had changed, too. Its now $44.59 with Amazon Prime. Nice!
__
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w2...@arrl.net


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Re: [Elecraft] Elecraft UPS deliveries

[Larry Phipps]

I do a lot of shipping, and here is what I have found...

For most domestic orders we ship using Priority Mail. They deliver 6 
days a week to almost everywhere, including PO boxes. They provide 
tracking and some level of insurance, and you can increase the insurance 
for low cost.


For higher value domestic packages we tend to use Fedex Ground. Usually 
a day or two slower, but better tracking and I feel better about the 
insurance process. When I need faster, I find 2-day service to be a 
reasonable cost.


For international we almost always use USPS Priority or Priority Express 
Mail. Exceptions include large packages. Fedex has a special program 
that gives ~70% discounts for international packages over 10 lbs.


One note about reliability. I find both to be extremely reliable. We 
have never lost a package in the US, and only a couple out of thousands 
internationally. There are several countries where theft is an issue, 
but for the most part they are all quite good.


I don't use UPS for outgoing shipments, but I use them for incoming 
because they get here earlier in the day.


73,
Larry N8LP



On 4/23/2014 11:07 AM, elecraft-requ...@mailman.qth.net wrote:

Date: Wed, 23 Apr 2014 09:47:55 -0400
From: Joe Subich, W4TVli...@subich.com
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft UPS deliveries
Message-ID:5357c48b.2070...@subich.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed


USPS Priority Mail delivers to any address in the US six days a week
and retail prices are generally 15 to 20% less expensive than UPS Brown
(Ground).

73,

 ... Joe, W4TV


On 4/23/2014 9:35 AM, Bill wrote:

I have seen the USPS Priority $999 price when I didn't specify my location
prior to searching for delivery options.  Are you sure that USPS priority
delivers to Staten Island?

Bill  k4yjj


On Wed, Apr 23, 2014 at 8:03 AM, Slava Baytalskiysla...@nullserv.comwrote:


I chose UPS Ground.
Funny thing is i actually tried every choice in that drop-down.
USPS Priority came out to $999 or some ridiculous number.

On Apr 23, 2014, at 8:00 AM,tnny...@yahoo.com  wrote:


Did you choose next day, or 2nd day  Delivery 

  OR!

Did  you choose the Cheapest  option that was available?

73 Milverton.

On Wednesday, April 23, 2014 6:41 AM, Slava Baytalskiy 

sla...@nullserv.com wrote:

Hi everyone!
Sorry if i'm venting, but how come even the tiniest packages from

Elecraft take full 7 days to arrive via UPS Ground?

1 pound package via UPS Ground, for almost $17 shouldn't take this long,

should it?

I understand this isn't Amazon Prime, but come on, 7 days?

Slava B
W2RMS

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Re: [Elecraft] K3 interface to Signalink USB question

[Larry Phipps]

SignaLink is mono, I believe. LP-PAN requires stereo.

Larry N8LP



On 3/26/2014 10:39 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Wed, 26 Mar 2014 12:36:32 -0400
From: Slava Baytalskiysla...@nullserv.com
To:Elecraft@mailman.qth.net  Elecraft@mailman.qth.net
Subject: [Elecraft] K3 interface to Signalink USB question
Message-ID:e5f454b4-cd14-493f-b9a7-2dd8be8e4...@nullserv.com
Content-Type: text/plain;   charset=us-ascii

Hello everyone!
I have a Signalink USB box that I'd like to interface with my new K3. From what 
I understand the preferred connection method is via the rear Line-In/Out jacks, 
right? I am using those with my rack audio gear, though (xlr mic/EQ/mixer/etc). 
What would you guys suggest that I do?
Can/should I use the front mic connector (it is the standard Kenwood 8-pin 
pinout, right?). Or is it possible to connect the Signalink inline with the 
audio stuff, between the rack and the K3?
Also, I have a new LP-PAN with an E-mu 0404 sound card that I haven't connected 
yet. So I wonder if that can somehow be used for the Signalink.

I also have an iPlus box (FYI).
Thanks in advance for your suggestions and ideas!

Slava Baytalskiy
sla...@nullserv.com
W2RMS

--


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Re: [Elecraft] K3-DXLabs-LP-Bridge AI command question

[Larry Phipps]

You have a number of apps connected, and you may find that each one 
prefers a specific setting of the AI box for its port. Do you have the 
problem with just LP-Bridge and DXLabs running?


I also responded in one of my posts that you can rearrange things so 
that DXLabs connects directly to the rig, and set up Secondary CAT in 
DXLabs to communicate with LP-Bridge via a virtual pair (like VSPE, 
com-ocom, VSP Manager, etc.). Then the rest of the apps connect to 
LP-Bridge.


Larry N8LP



On 12/29/2013 1:16 AM, Sam Morgan wrote:
Well since I tried to cover all my bases and ask this on 3 different 
reflectors, in the hopes I might get an answer I could use, I'll sum 
up the results and post them now.


First, thanks to all who responded to my questions.
Second I'm not trying to bash LP-Bridge, only find a fix for my problem,
and I hoped the new info about AI from Dick might help solve it.

Dave AA6YQ says:
When Commander starts controlling a K3, it sends an AI2; command 
unless you have Continuous interrogation disabled, in which case it 
sends an AI0; command.


Larry N8LP says:
The AI boxes in LP-Bridge have nothing to do with the AI mode of the 
K3. These are used to simulate AI modes for apps connected to each 
virtual port. LP-Bridge forces the K3 into AI2 mode all the time. With 
many apps trying to control the rig, it would be a mess to let each 
one try to change the AI setting in the rig, therefore all AI commands 
are intercepted once LP-Bridge puts the rig in AI2 mode.


and from Dick K6KR, I learned how I could put the K3 into AI2 myself,
independent of either DXLabs or LP-Bridge, by using the K3 Utility pgm.

Over the last two years I have been using 2 different boxes,
during which I was encountering random LP-Bridge crashes on both.
I say random because there was nothing that would cause the crash.
I could leave the pgms running and not touch anything yet after while 
LP-Bridge would crash with a Runtime error.


One box was an AMD 2.9 Ghz, 4gig ram, with both Win7 Pro 32-bit and 
64-bit.

The other box is an AMD 4.0 Ghz, 32gig ram with Win7 Pro 64-bit.
Both machines have real serial ports, not usb to serial, and
the serial cards were different on the 2 boxes.

I always set the polling rate for LP-Bridge to 200ms  NaP3  DXLabs 
for 300ms as was suggested by Larry here:

http://www.telepostinc.com/NaP3.html#Setup

quote
Rig Timing (ms)...
Polling Interval: Defaults to 300ms. If using LP-Bridge or LPB2, be 
careful when setting this lower than 300, and never set it lower than 
the setting in LP-Bridge or LPB2. In general, this should be set about 
100ms slower than the LP-Bridge / LPB2 setting.

/quote

Over the last 2 years I've made a several runs at solving this.
I have ask on the LP-PAN list a number of times about my crash problem.
Each time it seemed I was the only one having the problem, so I would 
wait a while and ask again later in the hopes that someone new to the 
list might also have the problem and maybe even the solution.
But if others can't duplicate the problem, of course they can't help 
fix it. :-(


So I have just tolerated it or just not run LP-Bridge if it got to bad.
Some days I could run LP-Bridge all day, but then if it crashed once,
it would continually crash the rest of the day, even after reboots.

All the above is just to give details, not to bad mouth LP-Bridge!
I love it, it's a valuable tool, that is why I keep trying to use it,
but it's hell trying to use it, if it won't stay running.

It's a bit to soon to tell, but I have had some success over the last 
week, even before Dick's info about the K3's AI setting, just by 
chance I had tried setting the DXLabs virtual port in LP-Bridge to AI2,

at least it would run longer before it crashed.

So to sum this up, now I have the K3 set to AI2
Larry says LP-Bridge defaults to AI2 when it talks to the K3
Dave says DXLabs Commander uses AI2 for continuous interrogation.


LP-Bridge is currently handling 4 different programs at the same time.
DXLabs Commander, N3FJP, VE7CC,  NaP3
It's been 6hrs with no crash, maybe everyone is on the same page now.

Sorry for the bandwidth, feel free to use your delete key ;-)
sm

On 12/28/2013 9:49 PM, Larry Phipps wrote:

The AI boxes in LP-Bridge have nothing to do with the AI mode of the K3.
These are used to simulate AI modes for apps connected to each virtual
port. LP-Bridge forces the K3 into AI2 mode all the time. With many apps
trying to control the rig, it would be a mess to let each one try to
change the AI setting in the rig, therefore all AI commands are
intercepted once LP-Bridge puts the rig in AI2 mode.

As far as DXLabs goes, many users run it with LP-Bridge, but there are
so many hardware and software variables between stations that it's hard
to make direct comparisons.

Larry N8LP



On 12/28/2013 7:46 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 28 Dec 2013 14:05:33 -0600
From: Sam Morgank5oai@gmail.com
To:elecraft@mailman.qth.net elecraft

Re: [Elecraft] K3-DXLabs-LP-Bridge AI command question

[Larry Phipps]

The AI boxes in LP-Bridge have nothing to do with the AI mode of the K3. 
These are used to simulate AI modes for apps connected to each virtual 
port. LP-Bridge forces the K3 into AI2 mode all the time. With many apps 
trying to control the rig, it would be a mess to let each one try to 
change the AI setting in the rig, therefore all AI commands are 
intercepted once LP-Bridge puts the rig in AI2 mode.


As far as DXLabs goes, many users run it with LP-Bridge, but there are 
so many hardware and software variables between stations that it's hard 
to make direct comparisons.


Larry N8LP



On 12/28/2013 7:46 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 28 Dec 2013 14:05:33 -0600
From: Sam Morgank5oai@gmail.com
To:elecraft@mailman.qth.net  elecraft@mailman.qth.net
Subject: [Elecraft] K3-DXLabs-LP-Bridge AI command question
Message-ID:52bf2f0d.7000...@gmail.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Rig is a K3. Computer is running WIn7 Pro 64-bit, AMD 4.0 Ghz, 32gig
ram, real Serial port, not usb to serial. LP-Bridge is set to 200ms
polling rate, DXLabs Commander is set to 300ms polling rate.

Having just read K6KR's reply to Barry about the AI command (quoted
below) I wonder if this may be the cause of my random LP-Bridge crashes.
My K3 is set to normal AUTOINF or AI0

Is anyone using LP-Bridge with DXLabs with no crashes,
if so, what setting are you using in LP-Bridge for the AI setting,
and what settings are you using for AUTOINF on your K3?

Not knowing what AI did (until I just read about it in the K3 Programers
Reference Manual) I have been experimenting with different settings for
the AI for DXLabs within LP-Bridge. It seems LP-B doesn't crash 'as
often' if I use AI2.

=quote==
It's in the K3 programmer's reference.  From the K3 Utility, command tester,
enter AIn; where n is 0, 1, 2, or 3.

Don't enter the quotes, do enter the semicolon.  AI; is a query, it should
respond with AI0; or AI1;, etc.

73 de Dick, K6KR


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Re: [Elecraft] K3 Error

[Larry Phipps]

I have not heard any other reports of this from users with this FW 
version, but I am not currently using it. I'll update my K3 and see how 
it goes.


Larry N8LP


On 12/16/2013 12:00 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Mon, 16 Dec 2013 08:28:38 -0500
From: John Huffmanhjo...@gmail.com
To: Elecraft Listelecraft@mailman.qth.net
Subject: [Elecraft] K3 Error
Message-ID:52af0006.2030...@gmail.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Good morning -

This morning in the midst of a CW QSO my K3 (FW 04.67, D1 02.81, D2
02.81, FL 01.15, DR 01.03) locked up with the following message -

E 0404 C8
ERR DSE

The serial port was connected to LP-Bridge.

How do I keep that from happening again?

73 de K1ESE
John


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Re: [Elecraft] K3 to Expert Amp cable ?

[Larry Phipps]

Ed, normally you would need just a standard straight thru male to female 
serial cable with just pins 2, 3 and 5 used to go from the PC to the 
amp. With some devices, like SteppIR controllers, you also have to 
jumper pin 7 to pin 9 at the device end of the cable to provide a 
handshaking loopback. The device has to be set for Kenwood protocol, 
4800 baud.  I don't know enough about the 2k-fa to know if that's 
possible, or what connector it uses.


Larry N8LP



On 10/25/2013 5:22 AM, elecraft-requ...@mailman.qth.net wrote:

Date: Wed, 23 Oct 2013 17:35:54 -0500
From: Ed Stallmann...@airmail.net
To:elecraft@mailman.qth.net
Subject: [Elecraft] K3 to Expert Amp cable ?
Message-ID:52684f4a.6020...@airmail.net
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hello Group

My 2k-fa will be here in a week of so , in preparation I bought 2 ea DB9
Female and 2 ea DB15 male connectors (SO2R)

Here's my setup : K3 connected to computer using LP-Pan and LP-Bridge to
connect to N1MM and NAP3 ... Looking in LP-Bridge , I have a Output Com
Port #1 and #2 and on my computer I have unused DB9 ports .

My question's : Did I buy the correct DB15 connector ? Can someone
please tell me the connection from the DB9 to the DB15 ? I will not be
using ALC  or the option to turn on the 2K-FA with the K3 , simply need
the CAT.

#2 K3 and computer will be setup  the same.

Thanks for your help

Ed N5DG


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Re: [Elecraft] CW skimmer setup question

[Larry Phipps]

Two observations...

Poling rate of 100 is fine for LP-Bridge, since the traffic is 
intercepted and responded to from memory. With a standard bridging 
program, all those requests are passed on to the rig. In the case of the 
K3, eventually the data rate will exceed the allowable amount and cause 
issues.


Timeout of 100 seems way too low. The program has to be able to try at 
least several times to respond to a request, especially since a standard 
bridging program allows packet collisions, and if there is just one 
compromised packet sent that the rig doesn't understand, there is not 
enough time for the next good one to get to the rig.


73,
Larry N8LP




On 9/2/2013 10:03 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Mon, 2 Sep 2013 18:11:20 -0700 (PDT)
From: Chuck - AE4CWae...@att.net
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] CW skimmer setup question
Message-ID:1378170680681-7578523.p...@n2.nabble.com
Content-Type: text/plain; charset=us-ascii

Mike,

Please see my embedded responses below:

Just downloaded CW skimmer and am using it with the LP Pan, E MU 0202 and of
coarse the K3. I am in the process of setting things up and has some
questions. As well just wanted to share the setup options I chose just to
make sure they are ok.
Under the settings taband then to the radio tab
1. I have set hardware to softRock-IF (as per LP Pan site) is this correct?
YES
2. Sampling rate I am going to use is 96 and I did set the same on the E MU
0202
OK
3. Pitch is set to 600 as is the K3
OK
4. The Audio IF I am not sure what to set that too as I am not running any
SDR software. The only answer I could find for the setting of the was to set
the Audio IF at -6000 and take away the global offset from your SDR
software. I am not using SDR software so is it left at -6000?
YOU WILL NEED TO ADJUST THE AUDIO IF SO THAT THE CW SIGNAL LINES UP WITH
THE SKIMMER FREQUENCY INDICATOR, I.E. THE GREEN POINTER.  MINE IS -5140.
The Audio tab is set as follows.
1. Sound-card driver is set to MME
OK
2. Signal and Audio devices are set to my E MU 0202 cards
OK
3. Channels was left at Left/Right= I/Q
I HAD TO CHANGE TO Q/I.
4. Shift Right channel data was left at 0 samples
OK
The Rig tab is set as follows..
I HAVE NOT USED VSP MANAGER...RATHER LP-BRIDGE, BUT SEE BELOW FOR MY
SETTINGS IN THE SKIMMER CAT OMNI-RIG PANEL
1. Rig K3
2. Com port to be set when I use VSP manager to set up a virtual port pair.
3. Baud 38400
OK
4. Data 8 bits
OK
5. Parity none
OK
6. Stop 2
THE K3 USES 1 STOP BIT
7. RTS set to Highnot sure about this?
LOW
8. DTR set to high as well and not sure about this?
LOW
9. Poll set to default 500
100
10. Time out set to default 4000.
100
Not to concerned about other tabs at this moment in time. Just wanted to see
if I am on the right track with those who have this program up and running
with their K3
Thanks for your time
Mike
VE3WDM


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Re: [Elecraft] K3 deaf on 6m comparing to a FCDP+ ?

[Larry Phipps]

I'm a little late to this thread because I receive the digest version of 
the reflector, but I thought I would weigh in anyway ;-) I don't know if 
it matters that much on 6m, but the blocking IMD of the FCDP+ doesn't 
compare in any way with the K3. My tests show about 80dB before onset of 
blocking (at least on HF where I tested). That's probably about 40dB 
worse than a K3 with high quality preamp.


Larry N8LP



On 8/1/2013 12:00 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Wed, 31 Jul 2013 18:56:48 +0200
From: Oliver Dr?sedro...@necg.de
To:dk...@mmmonvhf.de,   Elecraft Reflector
elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 deaf on 6m comparing to a FCDP+ ?
Message-ID:2582FF28BA1A45619C7E788FA4869A99@dh8bqax60
Content-Type: text/plain; format=flowed; charset=UTF-8;
reply-type=original

Hi Erwin,

second that. I use the Extra-6 by HA8ET for the K3 and you already have an
Extra-2 so you know their quality. ;-) Besides this it is way cheaper than
the PR6 by Elecraft. ;-)

73, Olli - DH8BQA



- Original Message -
From: Johnny Siuvr2...@yahoo.com.hk
To:dk...@mmmonvhf.de; Elecraft Reflectorelecraft@mailman.qth.net
Sent: Wednesday, July 31, 2013 3:52 PM
Subject: [Elecraft] K3 deaf on 6m comparing to a FCDP+ ?



  Hello Erwin,

  No doubt K3 is deaf in 6m. This is the reason why there is PR-6 or PR6-10
  pre-amp offered by Elecraft. Upon the installation of those pre-amp, K3 is
  in par with other radios in 6m under the same class.

  Apart from the choices from Elecraft, you may consider
  http://www.ha8et.hu/  extra-6 which is contest grade pre-amplifier.

  To be fair to K3, if local RF noise is high in your area, pre-amp will not
  help you anyway.

  TNX  73,


  Johnny VR2XMC


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Re: [Elecraft] computer - P3 - K3 communications blues

[Larry Phipps]

FWIW...

LP-Bridge blocks the commands used by K3 Utility because I don't want 
anyone trying to flash new firmware through LP-Bridge. I am of the 
opinion that flashing firmware should only be done by a direct 
connection to the K3. This was a conscious choice. I have talked to Dick 
about ways to possibly open up LP-Bridge for other functions of Utility, 
but haven't had time to address this. To handle many of the terminal 
functions of K3 Utility, users can run a program like K-Keys on one of 
the virtual ports.


Programs like VSPE pass all traffic from all apps to the K3. Any and all 
traffic will be sent to the K3, asynchronously as it is received from 
all apps. There are several potential problems with this. First, you 
could wind up with scrambled commands, second you will wind up with a 
high degree of duplication of commands and thirdly you can wind up with 
multiple apps sending competing meta commands, AIx, K2x and K3x, to the K3.


LP-Bridge blocks meta commands and puts the rig into a fixed state. It 
blocks all polling requests for the most common commands and instead 
does the polling for these commands itself. Since it already knows the 
state of each of these params, it can answer each app individually and 
asynchronously from memory. It only allows less often used commands to 
pass directly to the rig. This dramatically reduces the traffic to the 
K3. There is a limit to how much traffic the K3 can handle, and 
exceeding this limit can, or at least has in the past, caused issues... 
like loss of ALC during transmit during long transmissions.


There are always trade-offs, but my imprimatur is to protect the rig 
while allowing app sharing. Is it the perfect solution for every need? 
No, nothing is.


73,
Larry N8LP



On 3/16/2013 11:37 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Sat, 16 Mar 2013 13:32:25 -0400
From: david Moesdm...@nexicom.net
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] computer - P3 - K3   communications blues
Message-ID:5144aca9.9080...@nexicom.net
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hey Don
How about VSPEIve often wondered if it passes everything.  Its
simplicity makes me think that it possibly more efficient which may be a
bad assumption.   Ive not had any issues with it and while I would not
use it while upgrading firmware or calibrations etc.  I do use it using
terminal etc with the K3 Utilities.


On 3/16/2013 08:49, Don Wilhelm wrote:

  The K3 and P3 Utility programs should not be run through LP Bridge.
  LP-Bridge does not transfer everything used by the Utilities.

  73,
  Don W3FPR

  On 3/16/2013 8:38 AM, david Moes wrote:



  You should be able to run one and only one additional application
  to the P3. Once you have one application connected to the P3 serial
  port, that application blocks any other applications from using the
  serial port the K3 the P3 are using. So if you are trying to use the
  same serial port for more than one software application it will not
  use the P3 port. It will give you a port in use error message. 



  Isn't LP-Bridge going to allow more than one application to talk to
  the serial port? I thought that is one of its main purposes.

  alternatively and much simpler than LP-Bridge to solve this you can
  use vspe from eterlogic.  This can create a splitter to allow any
  number off applications to access a virtual port that is all routed
  into one physical Comm port.   works for me.   I often have logger32,
  MMSSTV FLDIGI all working at once.I can even have K3 utilities
  and K3eze all connected at the same time using VSPE.

  All that said it seems that the OP cant even connect one
  program.  Id also check that that all the cabling is correct.
  IE PC to P3 and P3 to K3 aren't reversed.  try removing the P3 from
  the picture just to double check that the serial port to K3 is
  working.   also  shut down LPbridge and try using the port directly
  with only K3 utilities using that port. I am not totally familiar
  with LP bridge so I am not sure if there is extra configuration if
  using the P3.

  73

  David Moes

  dm...@nexicom.net
  VE3DVY


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Re: [Elecraft] Dual receive using the K2. What's the best way to make that happen?

[Larry Phipps]

You might want to consider LP-PAN 2. It will not only give you dual 
receive, but also all the DSP bells and whistles of a Flex Radio and a 
real time panadapter as well. You would have to modify your K2 to add an 
IF output jack, but this is well documented and lots of guys have done 
it. It requires a PC, of course. The display width, and therefore the 
range over which you can run split is determined by the quality of your 
sound card, with ~200kHz being the max.


Total cost if you have a suitable PC and sound card would be approx. 
$300. Email me off list if you're interested in more info.


73,
Larry N8LP



On 3/14/2013 7:12 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Thu, 14 Mar 2013 14:10:34 -0400
From: Stephen Robertssteve...@shoreham.net
To:elecraft@mailman.qth.net Reflector  elecraft@mailman.qth.net
Subject: [Elecraft] Dual receive using the K2. What's the best way to
makethat happen?
Message-ID:acd588c8-42bb-43be-ab82-1b63f6aaa...@shoreham.net
Content-Type: text/plain;   charset=us-ascii

I would really like to have dual receive capability while I'm using my K2 split 
for DX. What do you think is the most practical way to approach that without 
buying another radio and installing another antenna?

I have an old Kenwood TS-430 available that I was thinking of using for an 
additional receive radio. The guys from DX engineering say that I could use a 
doohickie that will block transmit signal from the K2 to keep rf out of the 
TS-430.  Looks like it would cost about $225.

Is that the way to go?

73
Steve
W1SFR

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Re: [Elecraft] KAT500 LC settings recall -- complete explanation

[Larry Phipps]

I have been reading some of the KAT500 traffic and thought I'd weigh in 
with my particular thoughts.


One reason to have the tuner follow the VFO is that I would like to use 
the KAT500 for receive sometimes for SWL'ing or listening to BCB. In 
this case, I can't transmit, so it would be nice to have the tuner track 
the VFO.


One option is to use the utility to manually select settings, but my 
KAT500 is remoted at the base of my antenna in a waterproof box. A USB 
cable of the required length is not feasible, but I am looking into 
using a wireless USB extender for the task. I already have some wireless 
RS232 serial extenders, but have never tried one for USB. The prices are 
all over the place. Does anyone have any experience with these devices, 
with or without the KAT500? Would they be safe for flashing firmware?


Even with the utility connected, though, there doesn't appear to be any 
easy way to save setups based on names or frequencies. Maybe I've missed 
it since I'm not using the utility.


73,
Larry N8LP



On 12/25/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Mon, 24 Dec 2012 12:54:36 -0800
From: Wayne Burdickn...@elecraft.com
To: ab2tcab...@arrl.net
Cc:elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 LC settings recall -- complete explanation
(including auxBus tradeoffs)
Message-ID:c5be2d64-b735-4503-a2bf-897794ecf...@elecraft.com
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes


So what we're talking about now is whether it would be worth sending
frequency data from the K3 to the KAT500--at the time of keying--over
either the auxBus or the RS232 port. The answer, IMHO, is no. In
either case it would take approximately the same amount of time to
send the data as it would for the KAT500 to do RF sensing of the VFO
frequency.

If someone has a better idea or would like to explain their operating
scenario further, I'm all ears.

73,
Wayne
N6KR



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Re: [Elecraft] odds and ends...

[Larry Phipps]

Hi Don. I just received the digest version of your post. I don't recall 
ever having said that a 48kHz sampling rate will produce a 96kHz display 
span. All my postings and web site info states that the span will be 
roughly equal to the sampling rate (minus a tiny amount due to the 
rolloff of the anti-aliasing filter in the sound card). I saw Joe's 
comment copied in the same digest message, and it is not correct. I'm 
sure it was just a slip of the fingers. The confusion comes in that the 
displayed span is roughly equal to twice the sound card bandwidth... not 
twice the sound card sampling rate. The bandwidth of the card, of 
course, is roughly half the sampling rate if it is properly implemented.

73,
Larry N8LP



On 8/19/2012 11:51 PM, elecraft-requ...@mailman.qth.net wrote:
 From:elecraft-boun...@mailman.qth.net
 [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm
 Sent: Sunday, August 19, 2012 9:54 PM
 To: WB4JFI
 Cc:elecraft@mailman.qth.net
 Subject: Re: [Elecraft] odds and ends...

 I don't know the advertized numbers, but Mr. Nyquist aside, there is a
 reason that two independent experts with panadapter displays (Joe Subich
 W4TV and Larry Phipps K8LP of LP-Pan fame) state that a soundcard with a
 48 kHz rate will produce a 96 kHz span on the pan display.

 I do not doubt Nyquist, but I think the treatment of the numbers are a bit
 different (factor of 2)  Could it be due to the two channels? I really don't
 know the answers and do not have the energy to investigate such things
 anymore, I just choose to trust the experts who deal with this I/Q stuff on
 a daily basis.  I guess my scientific curiosity has declined with advancing
 years - it is no longer enjoyable to argue on the basis of observations vs.
 theory to sort out the differences - that was fun mind games many years
 ago. but today it is no longer a challenge.

 73,
 Don W3FPR

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Re: [Elecraft] KX3 and HDSDR

[Larry Phipps]

It is a rare built-in laptop sound card that has a stereo input. They 
are almost always mono mic inputs (except for some Apple laptops).

73,
Larry N8LP


On 8/11/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Message: 8
 Date: Sat, 11 Aug 2012 08:50:29 -0700 (PDT)
 From: Ignacyn...@arrl.net
 Subject: Re: [Elecraft] KX3 and HDSDR
 To:elecraft@mailman.qth.net
 Message-ID:1344700229292-7560862.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii

 What cables?

 I tried to adjust amplitude/phase on the laptop to eliminate the other
 sideband. No effect.  Perhaps teh card does not work in stereo although the
 card setup indicated that it is capable. Then moved to desktop. The
 adjustments worked. However, there is lots of noise +-5Khz from the center.

 Is there a good reason to work many KHz from the center?
 Seems one needs a good write up on interfacing HDSDR with KX3.

 Ignacy

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[Elecraft] P3SVGA waterfall problem

[Larry Phipps]

Maybe I'm missing something obvious, but I can't get a waterfall display 
on my external monitor. I have tried the entire range of the REF 
control. It looks fine on the small display, of course. All I get on the 
big monitor is black where the waterfall should be. I have tried all 
four resolution settings and three different monitors. I am running P3 
v1.13 and SVGA  v1.02. Is anyone else seeing this?

Larry N8LP



-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.1913 / Virus Database: 2409/4920 - Release Date: 04/07/12
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Re: [Elecraft] Power SDR Software

[Larry Phipps]

TNF as implemented in the current PowerSDR will not be available in NaP3 
or PowerSDR/IF because it uses proprietary hardware and driver software. 
Therefore, it won't be available for KX3 or LP-PAN users.

The relevant documentation is explicitly spelled out in the open source 
documents from Flex as I recall. There is nothing to stop a developer 
from creating his own solution to provide that functionality, but I 
doubt that would happen.

73,
Larry N8LP



On 3/10/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sat, 10 Mar 2012 11:53:51 -0500
 From: Miken...@nf4l.com
 Subject: Re: [Elecraft] Power SDR Software
 To:elecraft@mailman.qth.net
 Message-ID:4f5b871f.70...@nf4l.com
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 Well, I wanted to know if TNF is a gimmick, and if not would it be a 
 reasonable (all
 feature requests are reasonable, right?) request to incorporate into the K3.

 73, Mike NF4L

 On 3/10/2012 10:44 AM, Bruce Beford wrote:
   Not sure I understand your question, Mike. TNF (Tracking Notch Filters) 
  are
   a new feature incorporated into the latest versions of FlexRadio's 
  PowerSDR.
   It is not a gimmick, but a way of notching out local interference that
   appears routinely or constantly on the same frequencies at you particular
   location.
 
   What's your question?
 
   73,
   Bruce, N1RX
 
   Gimmick, or feature request?
 
   http://www.youtube.com/watch?v=t17ipMS8gAk
 
   73, Mike NF4L

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Re: [Elecraft] KX3- laptops for I/Q

[Larry Phipps]

Correction... In the last paragraph of my post I see that I included too 
much info from the iSDR web page. The page is aimed at generic SDR use, 
and therefore lists as a requirement the need for an SDR like SoftRock 
or LP-PAN. This is NOT needed with the KX3, of course. Additional 
hardware is required to get a stereo audio input to the mobile device. I 
sent a correction message yesterday, but it was apparently blocked by 
the Elecraft list server.

Larry N8LP



On 2/2/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 01 Feb 2012 12:24:18 -0500
 From: Larry Phippsn...@telepostinc.com
 Subject: Re: [Elecraft] KX3- laptops for I/Q
 To:elecraft@mailman.qth.net
 Message-ID:4f297542.4090...@telepostinc.com
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 Most laptops don't have a stereo input, only mono mic input, so they are
 worthless for SDR. I haven't tested any pc card type sound cards that
 are really good, but some can be acceptable for limited bandwidth if you
 can accept the center spike in the display. I have had very good results
 with my laptop and E-MU 0204 USB sound card.

 The SDR Widget sound card should be good since it uses the AK5394A ADC,
 but I completely disagree with their test results of the E-MU 0202. My
 tests using the same software testing suite were MUCH better. Also, they
 didn't test the E-MU 1212m, which uses the AK5394 and gives spectacular
 results.

 Even though a lot of emphasis is put on sound cards, I think most casual
 users of SDRs would be surprised at the results that can be obtained
 with basic sound cards... as long as they have stereo line level inputs.

 For basic field use with the KX3, there is an SDR app for iPhone / iPad
 / iPod Touch called iSDR which might be worth looking at. For stereo mic
 input, additional hardware is required, and of course a SoftRock or
 LP-PAN is still required.

 Larry N8LP

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Re: [Elecraft] KX3- laptops for I/Q

[Larry Phipps]

Most laptops don't have a stereo input, only mono mic input, so they are 
worthless for SDR. I haven't tested any pc card type sound cards that 
are really good, but some can be acceptable for limited bandwidth if you 
can accept the center spike in the display. I have had very good results 
with my laptop and E-MU 0204 USB sound card.

The SDR Widget sound card should be good since it uses the AK5394A ADC, 
but I completely disagree with their test results of the E-MU 0202. My 
tests using the same software testing suite were MUCH better. Also, they 
didn't test the E-MU 1212m, which uses the AK5394 and gives spectacular 
results.

Even though a lot of emphasis is put on sound cards, I think most casual 
users of SDRs would be surprised at the results that can be obtained 
with basic sound cards... as long as they have stereo line level inputs.

For basic field use with the KX3, there is an SDR app for iPhone / iPad 
/ iPod Touch called iSDR which might be worth looking at. For stereo mic 
input, additional hardware is required, and of course a SoftRock or 
LP-PAN is still required.

Larry N8LP



On 2/1/2012 11:40 AM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 1 Feb 2012 00:29:03 +
 From: Thomas Horstentho...@horsten.com
 Subject: Re: [Elecraft] KX3- laptops for I/Q
 To: Brian Pepperdinebrianpepperd...@sympatico.ca
 Cc:elecraft@mailman.qth.net
 Message-ID:
   CAPaRxgR-C=Uege91AkYgi14MH58Z8ebRNNo0ZUWTh+jr+=v...@mail.gmail.com
 Content-Type: text/plain; charset=ISO-8859-1

 Brian,

 Some laptops are good, some are bad. This varies even between laptops even
 with the same chipset, because the support chips differ. I've found that of
 all the laptops I've tried, only a HP 8440 had a really good chipset for
 SDR sampling up to 92kHz.

 Consider getting an external USB soundcard like the E-MU 0202, which works
 great on any laptop, or even the SDR Widget (still in the process of
 building mine, but the performance data is amazing even at 192kHz, beating
 any built-in or external sound cards on the market for this application!)

 You probably won't get any decent 192kHz sampling in any laptop. To get the
 noise level acceptable at this sampling rate, very careful design
 considerations have to go into it, which would conflict with the space
 constraints etc. of a laptop.

 So far, I haven't seen a really bad HP, nor a really good Dell... But
 those are just my experiences, YMMV.

 73, Thomas M0TRN

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Re: [Elecraft] Elecraft Digest, Vol 93, Issue 41

[Larry Phipps]

If your SR uses the 8192 xtal, then the global offset should be near 
-23000. All the other offsets should be set to 0 and let NaP3 poll the 
K3 for mode offsets. If you sidebands are reversed, just reverse your 
audio cables.

Larry N8LP



On 1/20/2012 10:30 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Fri, 20 Jan 2012 10:38:05 -0800 (PST)
 From: k5oaik5oai@gmail.com
 Subject: Re: [Elecraft] [K3] Aliases in Softrock panadapter display
 To:elecraft@mailman.qth.net
 Message-ID:1327084685686-7208572.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii

 I use LP-Bridge v1.02 and NaP3 with my K3 and softrock my Global settings
 differ
 Global offset has to be set at -23070 the rest are the same as Tony's.

 I have tried to use LPB2 v1.01
 and neither the -6000 or 23070 settings work for me
 for starters receive is on the wrong side no matter which LSB or USB
 and checking or un-checking I/Q shift doesn't fix it
 after playing a while PERHAPS if I set the global for -6000
 and then played with each mode's setting individually, I could get it to
 work

 much to much effort
 I finally just settled for running
 LP-Bridge v1.02 and NaP3
 works great.

 --
 ymmv
 Sam Morgan
 K5OAI

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Re: [Elecraft] K3 + LP100A + Dummy Load

[Larry Phipps]

I have been recommending the dummy loads and power attenuators from 
Ridge Equipment for years. They usually have a good selection, excellent 
quality and great prices. They will also provide a VNA plot for 10 bucks 
more as I recall. Remember that these loads usually have N connectors, 
so you may need an adapter.

73,
Larry N8LP



On 12/23/2011 6:48 AM, elecraft-requ...@mailman.qth.net wrote:
 Date: Thu, 22 Dec 2011 14:29:14 -0800 (PST)
 From: ab2tcab...@arrl.net
 Subject: Re: [Elecraft] K3 + LP100A + Dummy Load
 To:elecraft@mailman.qth.net
 Message-ID:1324592954992-7120191.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii

 Hi,

 I highly recommend the 75W dummy load from Ridge Equipment. I have one
 permanently connected in my system. I believe it is a military surplus piece
 of equipment with absolutely superior characteristics like an SWR at 500MHz
 of 1.05 or less. It has no problem with 100W for a minute or less for sure.

 AB2TC - Knut


 Phil,

 All dummy loads are not created equal.  Connect yours directly (no coax)
 to the LP-100 or an antenna analyzer to determine its characteristics
 with frequency (I assume Larry calibrated your LP-100 to NIST
 standards).  A common ham dummy load is something to tune your amplifier
 into and use for general purposes.  If you are going to do measurements,
 you will need something more like lab quality dummy loads.

 Both your dummy load and the 6 feet of RG8X will show a frequency
 dependency since you do not have a precision 50 ohm dummy load.  A
 transmission line that is not terminated in its characteristic impedance
 acts like an impedance transformer, and that transformation ratio is
 frequency dependent.

 If you want a dummy load that is flat WRT frequency and suitable for
 instrumentation use, take a look at the Caddock 50 ohm Thick Film
 Resistors - they are available up to 100 watt rating.  You must use them
 on a heat sink, and keep the leads as short as possible, and you will
 have a precision dummy load.  Caution - even with the heat sink, do not
 exceed their power ratings, they will go open circuit in an instant.
 I use several of those as instrumentation precision loads.

 Other sources of precision dummy loads is Ridge Equipment -
 https://www.ridgeequipment.com/store/dummyloads.html.  They have one
 rated at 75 watts for $12 and one rated at 15 watts for $7.50 - those
 are quite good for instrumentation purposes.

 73,
 Don W3FPR

 snip
 /quote

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Re: [Elecraft] P3 Schematic

[Larry Phipps]

I see in my digest message that nobody responded yet, so I'll jump in. 
There was a schematic in the manual when I got mine, and well as specs. 
The manual is also available online in the manuals section of the 
website. P3 is designed to be connected to the IF output of the K3. The 
levels there are comparable to the antenna signals when the K3 preamp is on.

Larry N8LP



On 11/27/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sat, 26 Nov 2011 09:02:24 -0800 (PST)
 From: Ken Robersonkwrober...@yahoo.com
 Subject: [Elecraft] P3 Schematic
 To: Elecraft Elecraftelecraft@mailman.qth.net
 Message-ID:
   1322326944.52221.yahoomail...@web160502.mail.bf1.yahoo.com
 Content-Type: text/plain; charset=us-ascii

 Hello All,

 Looked through all my stuff and on Elecraft web site
 and can not find the P3 schematic or spec.
 Would like to know how much signal for input.

 A little help please
 73 Ken K5DNL

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Re: [Elecraft] Elecraft Digest, Vol 91, Issue 25

[Larry Phipps]

On 11/17/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 16 Nov 2011 12:14:37 -0600
 From: Richard Fjeldrpfj...@embarqmail.com
 Subject: [Elecraft]  SDR-IF and I/Q questions
 To: elecraft postingelecraft@mailman.qth.net
 Message-ID:4844C59175CE4F65BF4D7400354623EB@BIOSTAR
 Content-Type: text/plain; charset=Windows-1252

 Larry,  (Reply to message 12, 16 Nov 2011)

 Yes, I have the XG2 generator for portable use, and another gen in a IFR1500 
 I can use.

 I wrote down the test levels when I tested the SoftRock w/Z10,000 but
 I don't remember them. I hope I can find the notes easily.

 I found this interesting: (As the number of signals goes down,
 the required strength of the signals goes up)

As regards WBIR.

 I DO understand the last part of the paragraph,
 but I have a question about this: (We use -50dBm (S9+23dB) in the
 shop to check out LP-PANs before shipping)

 What is the ratio of input to output level?  And better yet, what is the 
 input level
 you expect  to see from the IF of a radio on average?  I'm curious.

I'm not sure which input and output you are referring to. The IF output 
of the K3 is about 7dB lower than the antenna input as I recall 
(assuming the rig has the buffer mod). The Z1 can be set for less 
loss than that, so that the transfer loss could be reduced to zero. If 
you are using the KXV3 and Z1, you could set the Z1 gain to 
compensate, but it's still going to increase the noise floor. In the 
case of LP-PAN, we place a low noise preamp between the KXV3 output and 
buffer amp input (the LP-PAN buffer is similar to the Z1). This 
allows lowering the noise floor while still having the high isolation 
advantage of the buffer. Jack offers a really low noise preamp that you 
could place between the KXV3 and Z1 to accomplish a similar feat.

Pan signals should roughly match your K3 S-Meter if you calibrated the 
K3 against your XG2. I typically see signals at around S9 during the 
week, and maybe 20dB higher when the bands are open and crowded on weekends.

Larry N8LP






 Thanks again,
 Dick, n0ce

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Re: [Elecraft] SDR-IF and I/Q questions

[Larry Phipps]

I think that the Image Rejection CAL screen only works with SDR-1000 
hardware. It was removed in NaP3.

Larry N8LP



On 11/15/2011 11:01 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Tue, 15 Nov 2011 13:32:11 -0600
 From: Richard Fjeldrpfj...@embarqmail.com
 Subject: [Elecraft]  SDR-IF and I/Q questions
 To: elecraft postingelecraft@mailman.qth.net
 Message-ID:929717600FA246A7AEA27697ADF1FEB3@BIOSTAR
 Content-Type: text/plain; charset=Windows-1252

 Whoops, apparently I do not have permission to post to the Google groups, 
 yet.  So it will be awhile before I can.

 So, FWIW, I will say it here, until then.

 I have a K3 with a SoftRock Lite II IF receiver , and I have to use SDR-1000 
 in the setup.  When I do the Image Rejection Calibration, I notice the 
 software tunes my radio to WWV at 10 MHz, and then changes it to 9.982 MHz. 
 It looks like it is trying to calibrate for the SDR-1000, but the SoftRock 
 has a 24 KHz offset.

 Could this be the problem, or not?

 I set things up according to the best info I could find at the time.

 Richard Fjeld, n0ce
 rpfj...@embarqmail.com
 I'd rather be learning.


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Re: [Elecraft] SDR-IF and I/Q questions

[Larry Phipps]

You might want to consider buying an XG2 test generator kit from 
Elecraft. It would help a lot to have a signal of known level to adjust 
your overall gain. It would also help with image rejection adjustment, 
although a single carrier at S9 is a tad low for WBIR to work reliably. 
WBIR assumes a lot of medium strength signals. As the number of signals 
goes down, the required strength of the signals goes up. We use -50dBm 
(S9+23dB) in the shop to check out LP-PANs before shipping. WBIR takes 
about 10 seconds to find an initial null at this level. The image drops 
to about -130dBm. If you set your overall gain so that you get a -73dBm 
blip with the K3 preamp OFF, that would give you about -62dBm with the 
preamp ON. You can get the extra gain by changing the gain setting 
resistor on the Z1, or increasing the sound card gain. If your K3 
does not have the buffer mod, that would be a good idea to add as well.

73,
Larry N8LP



On 11/15/2011 11:01 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Tue, 15 Nov 2011 13:21:24 -0600
 From: Richard Fjeldrpfj...@embarqmail.com
 Subject: [Elecraft]  SDR-IF and I/Q questions
 To: elecraft postingelecraft@mailman.qth.net
 Message-ID:423B456D46A04B79A8646FDD9820B2B2@BIOSTAR
 Content-Type: text/plain; charset=Windows-1252

 Larry,
 Thank you for the suggestion. That could be possible. I'd hate to remove the 
 Z10,000
 Buffer/Amp to change out a SMD component, but that may be what I will have to 
 do.
 My Z10,000 is set for 0 dB gain at present.  I just e-mailed the Google 
 PSDR-IF group
 a question about an observation I have made. It may be totally in the wrong 
 pew, but
 you may want to look for it. And, it may reveal something I am doing wrong.

 Thanks,

 Dick, n0ce

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Re: [Elecraft] SDR-IF and I/Q questions

[Larry Phipps]

Dick, if some programs work, then your levels may be low. PowerSDR/IF 
and NaP3 use an algorithm developed by Flex Radio called WBIR (Wide Band 
Image Rejection). It does a phenomenal job of eliminating images (80dB) 
but is sensitive to levels, requiring a minimum amount of total signal 
power in the display to work. Since you say that other programs work, 
your issue may be levels. Most SDR users have no trouble with this, but 
there are stubborn cases like yours that pop up. They are usually 
related to sound card drivers or other system settings... or even bad 
cables. I had one customer who sent me his whole setup, and I found that 
his new cables from Radio Shack had about 10 ohms resistance between 
center pin and shield. There are tens of thousands of SDR users out 
there who are successfully using them, so these things can be solved. 
Pete and I have been talking about an indicator for NaP3 that would 
graphically display the overall balance of the sound card channels as a 
way to verify that the channels are matched within the range necessary 
for WBIR to work, but this would take some thought... and work. It would 
be worthwhile, though, for the percentage of users with stubborn image 
issues.

One very simple program, that provides all the features of the P3 except 
fixed tune mode, is TRX-Pan. It is extremely well integrated with the 
K3, and has a very simple manual image rejection adjustment (sliders for 
gain and phase). You set it once and forget it. There is no automatic 
learning needed and it will not change with levels or time. The 
tradeoff is that image rejection across the display will vary from about 
60-80dB. Only the very strongest signal (S9+30dB or more) would produce 
an image, and it would be 60-80dB weaker than the signal. Since the 
adjustment is manual, you can easily tell if your sound card has a 
problem, and make external adjustments while watching the image for 
changes. TRX-Pan requires LP-Bridge or TRX-Manager as the link between 
the rig and software. It is very easy to set up, especially with 
LP-Bridge. Everything you need can be found here...

http://www.telepostinc.com/TRXP.html

73,
Larry N8LP



On 11/15/2011 3:53 AM, elecraft-requ...@mailman.qth.net wrote:
 Date: Mon, 14 Nov 2011 12:42:41 -0600
 From: Richard Fjeldrpfj...@embarqmail.com
 Subject: [Elecraft]  SDR-IF and I/Q questions
 To: elecraft postingelecraft@mailman.qth.net
 Message-ID:20779EE975F7478494FA31FC637B8D30@BIOSTAR
 Content-Type: text/plain; charset=Windows-1252

 Well Dave, maybe I am missing something here, but this thread has been
 about the anticipated KX3 and having a Pan-Adapter to use with it.  As I 
 understand
 it, the I/Q leads are being brought out, but not the IF.  So other SDR 
 receivers, or adapters, are not
 needed. Therefore, we are down to finding acceptable software, soundcards, 
 and computers
 to make it work on a par with a P3.

 The programs I tried that are not producing mirrored images are lacking good 
 control between radio and software. No 'search and pounce' capability, and 
 time consuming to adjust as the frequency was changed beyond the display 
 width.  Not hardly on a par with a P3. Perhaps there is something out there 
 that I am not aware of. I'll concede that, but if it is a commercial product, 
 I want to exercise 'buyer beware'.

 I find PSDR-IF would be a very good match if it wasn't for the mirrored 
 images that fills a crowded
 screen. Thanks to a fine gentleman who sent me this link, it shows I am not 
 the only one
 having this problem.  Go to:
 http://groups.google.com/group/powersdr-if-stage/search?group=powersdr-if-stageq=imageqt_g=Search+this+group


 and click on the posts with image to see all the posts on this topic.  Many 
 people are having trouble
 with it.  AND, it pretty well identifies the problem.  If it ever gets fixed, 
 we will have something encouraging.  At the speed it is going, it may be only 
 for younger people.
 73,
 Dick, n0ce

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Re: [Elecraft] SDR-IF and I/Q questions

[Larry Phipps]

Take a look at TRX-Pan, Tony. It does exactly that, is very well 
integrated with the K3, properly displays both main and sub passbands in 
all modes (including data sub-modes) and has a very nice uncluttered 
interface. It is very small code-wise, launches immediately and runs 
well even on netbooks. It is also very simple to install. It requires 
either LP-Bridge or TRX-Manager as the serial interface, but most SDR 
users would need LP-Bridge anyway. LP-Bridge is also small and normally 
runs in the background.

http://www.telepostinc.com/TRXP.html

Larry N8LP



On 11/10/2011 10:27 AM, elecraft-requ...@mailman.qth.net wrote:
 Message: 26
 Date: Wed, 9 Nov 2011 21:07:38 -0600
 From: Tony Estepestept...@gmail.com
 Subject: Re: [Elecraft] SDR-IF and I/Q questions
 To:elecraft@mailman.qth.net
 Message-ID:
   CACHwrmPUciYL54oJ+sim8r+xjuaqOt9=1gcy3camkn5v74c...@mail.gmail.com
 Content-Type: text/plain; charset=ISO-8859-1

 On Wed, Nov 9, 2011 at 5:51 PM, Don Wilhelmw3...@embarqmail.com  wrote:
 ==
 Somewhere along the line there may be a third kind of SDR software:
 program that displays a nice panadapter and provides solid CAT control for
 2 VFOs, but nothing else. In other words, the routines devoted to signal
 processing, filtering, etc. would be left out, and those functions would be
 left to specialized computing functionality inside the radio, as is done
 with the KX3. It will be cool if the arrival of the KX3 provides the
 motivation for some brave soul (or group) to gut-rehab one of the
 open-source programs such as PSDR so that it fits this description.

 Benefits would include a much reduced CPU load and elimination of latency
 problems. The most important benefit, however, would be that cutting out
 the massive code bloat might make it possible for somebody to actually get
 a handle on the mysterious interdependencies and internal conflicts inside
 the code that cause bugs: disappearing config files, unexplained shutdowns,
 loss of functionality, etc. The traditional excuse for these phenomena is
 to blame the OS, the computer, or the user, but we all know better. The
 reality is that when you have a huge, open-ended project, with rubbery
 design specs, with many hands contributing independently, partly
 object-oriented and partly not, partly written in native code and partly in
 interpreted code, partly tested and partly not, you are going to have
 problems. A smaller piece of code with clear design objectives, unity of
 purpose, unity of design and coding standards, and clearly enunciated
 testing checkpoints, would be a really cool thing for the next generation
 of the ham station hardware/software combo.

 73, Tony KT0NY

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Re: [Elecraft] SDR-IQ and K2

[Larry Phipps]

Steve, you might want to look at the combo of LPB2 and NaP3. LPB2 allows 
sharing of the rig port with an SDR and up to 5 apps, like LP-Bridge 
does with K3. NaP3 is the latest iteration of Flex's open source 
PowerSDR, has some really neat features. A version of NaP3 is in 
pre-release which fully supports K2, with extensive support for offsets 
for all modes.

Larry N8LP



On 11/10/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Message: 4
 Date: Thu, 10 Nov 2011 16:06:11 +
 From: Steve Buntingstephen.bunt...@virgin.net
 Subject: [Elecraft] SDR-IQ and K2
 To:elecraft@mailman.qth.net
 Message-ID:4ebbf673.3090...@virgin.net
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 Hi Folks,

 I have a Z1 buffer board in my K2 and have used it to drive a
 softrock as a panadapter for some time. It works just fine, but I have
 left this uncalibrated and my PC doesn't really have enough horsepower
 to run my external soundcard.

 I have been trying to reduce PC overhead and introduce click to tune
 by using an SDR-IQ instead. The system displays OK, but I cannot get
 Simon's SDR-Radio software to calibrate the panadapter to zero beat the
 radio RX. I know about the cal functions, but can't dial in enough
 offset for all modes. I suspect I am doing something fundamentally
 incorrect - can anyone help?

 1) I am using telling the SDR that the IF is 4.915MHz. I assume that is
 correct? I see that the soft rock radios are at 4.898MHz and I am not
 sure why.

 2) I assume the K2 offsets the frequency when modes are changed? If so,
 by how much on each mode? Does any mode have no offset at all? This
 would be the one I need to perform my initial calibration with.

 If any one has a K2 working with an SDR-IQ (either with SDR-radio or any
 other software that provides click to tune) I'd really like to hear from
 you - i have plenty to learn!

 Thanks es 73
 Steve
 M0BPQ

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Re: [Elecraft] K3 Beta 4.42 and LP Bridge

[Larry Phipps]

Hi Sam. Sorry for the delay in response. I get the reflector in digest 
mode, so I don't see postings sometimes for hours. I subscribe to so 
many reflectors on which 90% of the traffic is superfluous, that I am 
forced to use digest mode to keep the traffic at an acceptable level. A 
direct email or posting to the LP-PAN reflector would be faster.

You need to have the SDR app set to poll slightly slower than LP-Bridge. 
This is because polling from the SDR is passed through when it's 
running, and then some additional commands like SMH are added in 
LP-Bridge. This takes some additional time, and hence the slower polling 
rate in the SDR. I didn't play around much with the minimums in each 
program to see what differential is required, but the 250ms LPB / 300ms 
SDR that I normally use works fine here.

Larry N8LP



On 11/7/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sun, 6 Nov 2011 11:43:48 -0800 (PST)
 From: k5oaik5oai@gmail.com
 Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge
 To:elecraft@mailman.qth.net
 Message-ID:1320608628120-6968539.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii


 wayne burdick wrote:
   
   The latest K3 firmware revisions include a high-accuracy S-meter
   command (SMH) that was targeted at the S-meter Lite application.
   It's possible that other apps are using it, too, and trying to poll
   for it too fast. In any case, Larry and I will investigate.
   
 FYI, great improvements, thanks for all the work,
 but I fear I bare bad news, it's also a case of 2 steps forward and 1 step
 back.

 Pro's:
 I'm using LP-Bridge, v0.0.994 and S Meter Lite v2.22 with K3  beta 4.42
 S-meter Lite now works great, with no freezing like  it previously
 displayed.

 Con's:
 Now I can NOT use either PowerSDR/IF v1.19.3.5 or NaP3 beta 2.
 As soon as I start either pgm, S Meter Lite starts drawing a straight line,
 at the signal level last seen before I started either sdr pgm.
 As soon as I close the sdr pgm S meter Lite resumes working as before.

 I use a softrock with the if out of the K3 feeding a Delta 44 soundcard,
 all ports are real serial ports, no usb involved.

 73  GB
 K5OAI
 Sam Morgan

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Re: [Elecraft] K3 Beta 4.42 and LP Bridge

[Larry Phipps]

Point taken, Sam. I guess posting to both the reflector and me would be 
fast and still cover all interested parties, as you did with this message.

73,
Larry N8LP



On 11/7/2011 8:09 PM, Sam Morgan wrote:
 Thanks for your response Larry,
 not knowing which pgm was the culprit,
 I posted here on the Elecraft list,
 figuring _all_ the different pgm authors were reading here.

 And since only after the new K3 4.42 beta release
 was I now able to actually run S-Meter Lite,
 at the same time as other pgms I wanted to run, such as,
 DXLabs, VE7CC, CWSkimmer MultiPSK, N3FJP logs, to name a few.

 Your slower polling rates of 250ms LPB / 300ms SDR worked perfectly!

 You software gurus are just amazing,
 we (users) are forever in debt for *all* of your contributions
 that make our hobby more and more fun.

 -- 
 GB  73
 K5OAI
 Sam Morgan

 On 11/7/2011 1:08 PM, Larry Phipps wrote:
 Hi Sam. Sorry for the delay in response. I get the reflector in digest
 mode, so I don't see postings sometimes for hours. I subscribe to so
 many reflectors on which 90% of the traffic is superfluous, that I am
 forced to use digest mode to keep the traffic at an acceptable level. A
 direct email or posting to the LP-PAN reflector would be faster.

 You need to have the SDR app set to poll slightly slower than LP-Bridge.
 This is because polling from the SDR is passed through when it's
 running, and then some additional commands like SMH are added in
 LP-Bridge. This takes some additional time, and hence the slower polling
 rate in the SDR. I didn't play around much with the minimums in each
 program to see what differential is required, but the 250ms LPB / 300ms
 SDR that I normally use works fine here.

 Larry N8LP



 On 11/7/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sun, 6 Nov 2011 11:43:48 -0800 (PST)
 Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge
 wayne burdick wrote:

   The latest K3 firmware revisions include a high-accuracy S-meter
   command (SMH) that was targeted at the S-meter Lite application.
   It's possible that other apps are using it, too, and trying to poll
   for it too fast. In any case, Larry and I will investigate.

 FYI, great improvements, thanks for all the work,
 but I fear I bare bad news, it's also a case of 2 steps forward and 
 1 step
 back.

 Pro's:
 I'm using LP-Bridge, v0.0.994 and S Meter Lite v2.22 with K3  beta 4.42
 S-meter Lite now works great, with no freezing like  it previously
 displayed.

 Con's:
 Now I can NOT use either PowerSDR/IF v1.19.3.5 or NaP3 beta 2.
 As soon as I start either pgm, S Meter Lite starts drawing a 
 straight line,
 at the signal level last seen before I started either sdr pgm.
 As soon as I close the sdr pgm S meter Lite resumes working as before.

 I use a softrock with the if out of the K3 feeding a Delta 44 
 soundcard,
 all ports are real serial ports, no usb involved.

 73   GB
 K5OAI
 Sam Morgan


 -
 No virus found in this message.
 Checked by AVG - www.avg.com
 Version: 2012.0.1869 / Virus Database: 2092/4603 - Release Date: 11/07/11


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Re: [Elecraft] KX3 I/Q SDR questions

[Larry Phipps]

The E-MU 0202 was $99, and if you can find one, should still be in that 
price range. Its replacement, the E-MU 0204 is $140, but it should drop 
soon since it has been out for some months. The Infrasonic Quartet is 
$90 and still available at auzentech.com. The two older cards also 
appear periodically on eBay for even less.

Larry N8LP



On 11/7/2011 8:23 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Mon, 7 Nov 2011 15:32:09 -0600
 From: Richard Fjeldrpfj...@embarqmail.com
 Subject: Re: [Elecraft] KX3 I/Q SDR questions
 To: elecraft postingelecraft@mailman.qth.net
 Message-ID:F5837842E184478FA3A133B789FCA8EC@BIOSTAR
 Content-Type: text/plain; format=flowed; charset=iso-8859-1;
   reply-type=response

 Thanks Dave,

 My comments were to address only the pan-adapter aspect.  The SDR-IF
 receiver was the means to achieve a seemingly low cost computerized
 pan-adapter. (I acknowledge that the SDR receiver offers unique features. No
 argument.) I will be interested to see where a 192 KHz card can be bought
 for $120.

 I have been trying to run PSDR-IF on an HP with a P4 at 3 GHz.  with a 96
 KHz SoundBlaster card.  The image problem makes it unusable. Yet WinRad
 displays fine. I've used both a Softrock and an LP-PAN.

 I have a friend, and I read about others, who are trying to make it work on
 other radios with the same problem.  We can't find the solution. I have been
 told that others are successful. Perhaps it lies with the Video Card which
 you omitted in your cost estimates.

 Dick, n0ce

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Re: [Elecraft] K3 Beta 4.42 and LP Bridge

[Larry Phipps]

I have added support for K3 beta v4.42 to LP-Bridge and posted v0.9.994 
update on my LP-Bridge page at http://www.telepostinc.com/LPB.html

I tested this with the latest HRD 4.1 beta and it seems to be solid. I 
also added the SMH command to the speed governed list of commands to 
minimize the chance of this command overloading the K3 serial buffer. 
You should switch back to LP-Bridge and not use LPB2, because LPB2 does 
not limit the polling rate of SMH as LP-Bridge does. In general, K3 
users should use LP-Bridge. LPB2 was mainly designed to support other 
radios.

73,
Larry N8LP



On 11/5/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sat, 5 Nov 2011 06:29:22 -0700 (PDT)
 From: ai6iiai...@att.net
 Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge
 To:elecraft@mailman.qth.net
 Message-ID:1320499762037-6965853.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii

 The story continues My elation at finding a fix with the new LPB2 program
 was premature. I was suddenly plagued with the evil HRD turns the K3 AGC
 off problem, so I attempted to re-install regular LP-Bridge and set about
 trying to find out why I was suddenly having problems. I found that every
 time I keyed the K3, HRD lost connection to LP-Bridge. Mind you this was the
 exact setup that had been working for months before I attempted the K3 FW
 4r42 update. Why the keying causes a disconnect, I cannot tell you. I am
 very sure it is not RF.

 I decided to go back to LPB2 and fight the AGC turns off battle since it
 seems to work in all manner except for the unexpected loss of AGC. I looked
 for more solutions on the Net and found a very recent posting from KD6X who
 said he found the problem occurring only with the P3 in line. His solution
 was to keep the K3 to P3 connection at 38400 Baud, but set the P3 RS232 port
 which connects to the CPU to 9600 Baud. That way, the direct connection of
 HRD (through the P3) to the K3 will slow down the over polling of the K3. I
 am trying that idea using LPB2.

 .. mike AI6II

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Re: [Elecraft] K3 Beta 4.42 and LP Bridge

[Larry Phipps]

Hi Brian. Wayne forwarded this to me. I receive the reflector in digest 
mode and haven't seen the actual thread yet.

This is all news to me. I have not received a support email about it nor 
has it been mentioned on the LP-PAN reflector by any LP-Bridge users 
AFAIK. I run LP-Bridge 24/7 with several apps connected, including 
Skimmer, and never have disconnects. I always keep my K3 updated with 
the latest release, but don't have Beta 4.42 loaded.

I asked Wayne for some more background info on it and will investigate 
tonight.

73,
Larry N8LP



On 11/4/2011 11:15 AM, Wayne Burdick wrote:
 From: briana als...@nc.rr.com
 Date: November 4, 2011 4:32:47 AM PDT
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] K3 Beta 4.42 and LP Bridge

 This problem with a logging program seeing the K3 with LP-bridge
 disconnecting the K3 from the logging program is an old one.

 It existed for much more than a year.   The frequency was low and 
 tolerable.

 The problem has been made lots worse with the newer versions of the K3
 firmware which expanded the S meter range and the version of LPBRIDGE
 which reads it.   It is unusable here.   The setup is simply K3/logging
 program/SKIMMER.  The newer version of LP-BRIDGE also has the same
 problem with older K3 firmware versions even though it is supposedly
 backwards compatible.

 The older version of LPBRIDGE can't work with newer K3 firmwares.

 This makes it impossible for me to upgrade either LPBRIDGE or K3 
 firmware.

 Not a very satisfactory situation.   It appears nobody wants to own this
 problem and look for a fix.

 73 de Brian/K3KO 

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[Elecraft] FS KBPF3

[Larry Phipps]

I have a new KBPF3 for sale in the original packaging. Please contact me 
off-list for pricing and shipping details.

73,
Larry N8LP
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Re: [Elecraft] FS KBPF3

[Larry Phipps]

The KBPF3 has been sold. Thanks to all for your inquiries.

Larry N8LP



On 10/31/2011 7:31 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Mon, 31 Oct 2011 13:05:57 -0400
 From: Larry Phippsn...@telepostinc.com
 Subject: [Elecraft] FS KBPF3
 To:elecraft@mailman.qth.net
 Message-ID:4eaed575.7010...@telepostinc.com
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 I have a new KBPF3 for sale in the original packaging. Please contact me
 off-list for pricing and shipping details.

 73,
 Larry N8LP

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Re: [Elecraft] using P3 and Skimmer

[Larry Phipps]

Correct Jack. Just a couple additional comments...

LP-PAN has more than enough isolation, but we recommend the optional 
preamp (mounts inside LP-PAN) to overcome the total losses of the K3 
buffer and the hybrid splitter in the P3.

FWIW, I have measured the isolation of the P3 splitter, and it is 
considerably lower than 30dB. If using a SoftRock, I would consider it 
imperative to use a Z1 or similar buffer. It would also make sense 
to use one of your low noise preamps ahead of the Z1 if weak signal 
decoding in CW Skimmer is important. I would set the gain of the preamp 
at about 10dB, and the buffer at about 0dB.

73,
Larry N8LP


On 8/29/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sun, 28 Aug 2011 20:42:04 -0400
 From: Jack Smithjack.sm...@cliftonlaboratories.com
 Subject: Re: [Elecraft] using P3 and Skimmer
 To:elecraft@mailman.qth.net
 Message-ID:4e5ae05c.1020...@cliftonlaboratories.com
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 Don:

 I recently had a question from a prospective customer for a Z1B
 buffer amplifier about the need for additional isolation if a Softrock
 is used with the P3's splitter IF output.

 I can't find a spec for the P3's isolation between the IF output port
 and the IF Input, but 30 dB isn't a bad estimate for a 3 dB  hybrid
 splitter.

 Typical local oscillator leakage out of a Softrock is -40 dBm, so a -70
 dBm signal (approximately) will be injected into the P3's input if a
 Softrock is connected to the P3's IF out port. This will appear as a
 spurious pip on the P3's display at around -70 dBm.

 The LPPan has isolation and it's leakage is not a problem when used in
 this fashion.  But, I believe a Softrock will require additional
 isolation, on the order of 60 dB or so, in order to be useful without
 injecting a spurious pip into the P3.

 Jack K8ZOA


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Re: [Elecraft] Looking for miniature 14-V power supply for travel, use

[Larry Phipps]

Look through your old laptop PC power supplies. They are typically 14-19 
VDC with 1.5-2.2 A current supply capability. Some are clean, some are 
dirty, but they are generally quite small. I used to use one with my K2 
at trade shows.

Larry N8LP


On 7/5/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Mon, 4 Jul 2011 14:23:14 -0700
 From: Wayne Burdickn...@elecraft.com
 Subject: [Elecraft] Looking for miniature 14-V power supply for travel
   use
 To: Elecraft Reflectorelecraft@mailman.qth.net
 Message-ID:90fa3334-f5d5-41d6-93f6-0bacd2c4a...@elecraft.com
 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

 I'm going to take a KX3 with me on vacation this summer, and I like to
 travel light. I'll have internal batteries for field operation, but
 for indoor use, I'm hoping to find a miniature power supply that meets
 these criteria:

 - very small (say 4 x 3 x 1 inches)
 - light weight (less than 1 lb)
 - 2 A min. peak output current
 - 13 to 14 VDC output voltage
 - input AC voltage range of 100-130 V
 - low noise

 I'm sure it will have to be a switching supply. The question is
 whether any exist with this form-factor that are also quiet from an RF
 perspective.

 Anyone know of such a unit?

 73,
 Wayne
 N6KR

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Re: [Elecraft] KX3 netbook

[Larry Phipps]

  And lots of images with mono input ;-)

Larry N8LP



On 6/2/2011 11:27 AM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 1 Jun 2011 20:06:50 -0700
 From: Grega...@cablespeed.com
 Subject: Re: [Elecraft] KX3 netbook
 To: Rick Tavanrta...@gmail.com
 Cc:Elecraft@mailman.qth.net  Elecraft@mailman.qth.net
 Message-ID:BANLkTik+H45d5EU1OV_=wt7sks6zhvk...@mail.gmail.com
 Content-Type: text/plain; charset=ISO-8859-1

 The iSDR website says with mono input you will get 22kHz BW and 44kHz with
 stereo input.

 Greg
 AB7R

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Re: [Elecraft] Elecraft Digest, Vol 85, Issue 36

[Larry Phipps]

  It was great seeing you Johnny, and putting a face with the name ;-) 
It seems like more of our DX friends were able to make the trip this year.

73,
Larry N8LP



On 5/21/2011 10:15 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sun, 22 May 2011 09:45:46 +0800 (HKT)
 From: Johnny Siuvr2...@yahoo.com.hk
 Subject: [Elecraft] Glad to see you in Dayton 2011
 To: Elecraftelecraft@mailman.qth.net
 Message-ID:228783.5726...@web19305.mail.hk2.yahoo.com
 Content-Type: text/plain; charset=iso-8859-1

 Hello Group,
 ?
 It has been a wonderful time to see many of you in person (of course 
 including Wayne and Eric) in the past two days.? We have been in 
 correspondence?with some?of you for?quite a long time in this mail 
 reflector.? It is the first time that we met each other face-to-face.? The 15 
 long hour flight from Hong Kong?is very worthwhile.
 ?
 I also met Don Wilhem who has helped me a lot in my weakest areas - technical 
 side of Elecraft products.? I took the chance to say 'thank you' to him 
 personally.

 I will take the chance to visit the airforce musem in Dayton tomorrow.? After 
 that, I will?stay in?NYC for a couple of days?for sight seeing before 
 returning to Hong Kong.

 Hope to see you again !!



 TNX  73,

 ?
 Johnny VR2XMC

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[Elecraft] Subject: Glad to see you in Dayton 2011

[Larry Phipps]

 It was great seeing you Johnny, and putting a face with the name ;-)
 It seems like more of our DX friends were able to make the trip this year.

 73,
 Larry N8LP



 On 5/21/2011 10:15 PM,elecraft-requ...@mailman.qth.net  wrote:
   Date: Sun, 22 May 2011 09:45:46 +0800 (HKT)
   From: Johnny Siuvr2...@yahoo.com.hk
   Subject: [Elecraft] Glad to see you in Dayton 2011
   To: Elecraftelecraft@mailman.qth.net
   Message-ID:228783.5726...@web19305.mail.hk2.yahoo.com
   Content-Type: text/plain; charset=iso-8859-1
 
   Hello Group,
   ?
   It has been a wonderful time to see many of you in person (of course 
  including Wayne and Eric) in the past two days.? We have been in 
  correspondence?with some?of you for?quite a long time in this mail 
  reflector.? It is the first time that we met each other face-to-face.? The 
  15 long hour flight from Hong Kong?is very worthwhile.
   ?
   I also met Don Wilhem who has helped me a lot in my weakest areas - 
  technical side of Elecraft products.? I took the chance to say 'thank you' 
  to him personally.
 
   I will take the chance to visit the airforce musem in Dayton tomorrow.? 
  After that, I will?stay in?NYC for a couple of days?for sight seeing 
  before returning to Hong Kong.
 
   Hope to see you again !!
 
 
 
   TNX   73,
 
   ?
   Johnny VR2XMC


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Re: [Elecraft] Trying to get LP-100 PLOT to make K3 output

[Larry Phipps]

  Jim, set the control in Plot to Kenwood, keying mode to FSK. Set the 
K3 for Data and sub-mode to FSK-D or PSK-D. Works like a champ.

73,
Larry N8LP


On 4/20/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Message: 25
 Date: Wed, 20 Apr 2011 00:42:06 -0400
 From: Jim Staffordw...@amsat.org
 Subject: [Elecraft] Trying to get LP-100 PLOT to make K3 output
   carrier
 To:elecraft@mailman.qth.net
 Message-ID:4dae641e.1000...@amsat.org
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 Anyone done this.  I did it a long time ago with an ICOM but have
 never gotten the K3 to key.  It changes the frequency and mode, etc
 so I know the connection is good but I've tried DTR RTS and RTS DTR on
 the PTT-KEY
 option but to no avail.  There is only a K2 method of interfacing between
 rig and software so that may not be the best for the K3.

 I have also tried using the Kenwood interfacing to the rig.  It appears to
 key the K3, the red light comes on, but does not KEY the rig to get
 output power.  I can at that point during the 1 second intervals, key
 the rig manually and get a data point for each and a plot for the band.
 Just can't
 get it to work all automatically.

 Thoughts?

 jim/w4qo

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Re: [Elecraft] SDR IQ/IF Questions

[Larry Phipps]

  Hi Geoffrey. I just read through your thread (I receive the reflector 
in digest mode). I didn't see one of your questions answered, so I will 
tackle it...

I'm not aware of any version of PowerSDR which works with SDR-IQ. The 
interface has to be a sound card. My favorite version of PowerSDR is the 
/IF version by Scott, WU2X. I have tried others like PowerSDR/IQ, but 
they are not as well integrated with the K3 or LP-Bridge.

A recent addition, on which I am a contributing developer, is TRX-Pan. 
It is much simpler and cleaner looking than PowerSDR/IF and integrates 
more tightly with the K3. In fact, more tightly than any other 
panadapter for the K3, I believe. You can read about it here, 
http://www.telepostinc.com/TRXP.html TRX-Pan does not provide 
demodulated audio as PowerSDR does, so it can't be used as a sub-rcvr, 
but it does display and track passbands for both VFOs very nicely. It's 
more like a P3 with huge screen and mouse control.

I wasn't aware that Quisk now supports Windoze. Leigh might have 
mentioned this and I just forgot. I will play with it when I have some 
time. Maybe it could be customized to the level that TRX-Pan is in terms 
of K3 / LP-Bridge integration.

Before deciding on a PC based solution versus a partial PC based 
solution versus a standalone solution, I would download and play with 
the programs that would be required for any of these. They are all 
available as a free download, although WU2X requests a donation to 
support PowerSDR/IF if you decide to go that route. You can set these up 
to control the rig and display noise from your sound card. This will 
help you decide if the PC approach is right for you.

73,
Larry N8LP



On 4/6/2011 5:11 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 6 Apr 2011 13:29:45 -0400
 From: Geoffrey Wolfliltechdud...@gmail.com
 Subject: [Elecraft] SDR IQ/IF Questions
 To:elecraft@mailman.qth.net
 Message-ID:000f01cbf480$39143d10$ab3cb730$@gmail.com
 Content-Type: text/plain; charset=us-ascii

 Hello fellow SDR enthusiasts,



 I have looked around a little bit and haven't found a very definitive answer
 for the questions that I'm having about the way the K3 and external SDR
 equipment works.



 I've been looking into the LP-Pan which converts the IF output from the K3
 into (im guessing) audio signals which then are converted into digital data
 by a soundcard. The trouble I'm having is understanding what exactly I/Q is.
  From what I understand, I/Q is digital data that software like CW Skimmer
 understands.



 Now, I've also been looking at the SDR-IQ which does all of this internally
 by taking the IF output from the K3 and converts it directly into digital
 data which is then ferried to the computer over USB, forgoing the need for
 an extra soundcard.



 Now, I've seen two versions of PowerSDR. I've seen PowerSDR/IF (looks more
 developed/supported), and PowerSDR-IQ. What is the difference?



 I suppose the summary question of this email is. can you use PowerSDR/IF
 with an SDR-IQ rather than an LP-Pan? I personally would rather buy an
 SDR-IQ and take that extra hardware stage (possible audio loss) out of the
 picture.



 Thanks!



 Geoffrey Wolf

 AB3LS - Amateur Radio Callsign

 University of Pittsburgh '14

 gr...@pitt.edu

 liltechd...@me.com

 (412) 450-1310

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Re: [Elecraft] SDR IQ/IF Questions

[Larry Phipps]

  Sound card only.

Larry N8LP



On 4/6/2011 11:14 PM, Joe Subich, W4TV wrote:

 Larry,

  A recent addition, on which I am a contributing developer, is TRX-Pan.
  It is much simpler and cleaner looking than PowerSDR/IF and integrates
  more tightly with the K3.

 Does TRX-Pan support SDR-IQ or is it limited to soundcard based
 devices?

 73,

... Joe, W4TV


 On 4/6/2011 10:09 PM, Larry Phipps wrote:
Hi Geoffrey. I just read through your thread (I receive the reflector
 in digest mode). I didn't see one of your questions answered, so I will
 tackle it...

 I'm not aware of any version of PowerSDR which works with SDR-IQ. The
 interface has to be a sound card. My favorite version of PowerSDR is the
 /IF version by Scott, WU2X. I have tried others like PowerSDR/IQ, but
 they are not as well integrated with the K3 or LP-Bridge.

 A recent addition, on which I am a contributing developer, is TRX-Pan.
 It is much simpler and cleaner looking than PowerSDR/IF and integrates
 more tightly with the K3. In fact, more tightly than any other
 panadapter for the K3, I believe. You can read about it here,
 http://www.telepostinc.com/TRXP.html TRX-Pan does not provide
 demodulated audio as PowerSDR does, so it can't be used as a sub-rcvr,
 but it does display and track passbands for both VFOs very nicely. It's
 more like a P3 with huge screen and mouse control.

 I wasn't aware that Quisk now supports Windoze. Leigh might have
 mentioned this and I just forgot. I will play with it when I have some
 time. Maybe it could be customized to the level that TRX-Pan is in terms
 of K3 / LP-Bridge integration.

 Before deciding on a PC based solution versus a partial PC based
 solution versus a standalone solution, I would download and play with
 the programs that would be required for any of these. They are all
 available as a free download, although WU2X requests a donation to
 support PowerSDR/IF if you decide to go that route. You can set these up
 to control the rig and display noise from your sound card. This will
 help you decide if the PC approach is right for you.

 73,
 Larry N8LP



 On 4/6/2011 5:11 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 6 Apr 2011 13:29:45 -0400
 From: Geoffrey Wolfliltechdud...@gmail.com
 Subject: [Elecraft] SDR IQ/IF Questions
 To:elecraft@mailman.qth.net
 Message-ID:000f01cbf480$39143d10$ab3cb730$@gmail.com
 Content-Type: text/plain;charset=us-ascii

 Hello fellow SDR enthusiasts,



 I have looked around a little bit and haven't found a very 
 definitive answer
 for the questions that I'm having about the way the K3 and external SDR
 equipment works.



 I've been looking into the LP-Pan which converts the IF output from 
 the K3
 into (im guessing) audio signals which then are converted into 
 digital data
 by a soundcard. The trouble I'm having is understanding what exactly 
 I/Q is.
  From what I understand, I/Q is digital data that software like CW 
 Skimmer
 understands.



 Now, I've also been looking at the SDR-IQ which does all of this 
 internally
 by taking the IF output from the K3 and converts it directly into 
 digital
 data which is then ferried to the computer over USB, forgoing the 
 need for
 an extra soundcard.



 Now, I've seen two versions of PowerSDR. I've seen PowerSDR/IF 
 (looks more
 developed/supported), and PowerSDR-IQ. What is the difference?



 I suppose the summary question of this email is. can you use 
 PowerSDR/IF
 with an SDR-IQ rather than an LP-Pan? I personally would rather buy an
 SDR-IQ and take that extra hardware stage (possible audio loss) out 
 of the
 picture.



 Thanks!



 Geoffrey Wolf

 AB3LS - Amateur Radio Callsign

 University of Pittsburgh '14

 gr...@pitt.edu

 liltechd...@me.com

 (412) 450-1310

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Re: [Elecraft] [LP-PAN] K3 FW 4.31 problem

[Larry Phipps]

  Hi Steve. I tried 4.31 with the current version of LP-Bridge and I 
couldn't reproduce this with just LP-Bridge or with LP-Bridge and 
PowerSDR/IF v1.19.3.5. I did have a little trouble getting 4.31 to load, 
but after a couple tries it loaded OK. It is normal for PowerSDR to mute 
when XMIT is pressed or key/paddle is used, but in my case it releases 
quickly as it should. What polling rate are you using for LP-Bridge and 
what kind of serial port do you have? I have an FTDI USB to serial 
adapter on my laptop. The OS is W7 32-bit.

73,
Larry N8LP



On 3/25/2011 6:26 PM, Steve Ellington wrote:


 I recently loaded new firmware 4.31 and observed the following when 
 used with PowerSDR-IF and LPPAN.
 PowerSDR enters MUTE status when K3 buttons RIT, XIT, XMIT, Menu are 
 used. Also happens when K3 is keyed with key or paddle. PowerSDR-IF 
 MUTE triggers and will not disengage automatically but will release 
 when clicked with mouse.
 Has anyone else noticed?
 Steve
 N4LQ


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Re: [Elecraft] K3, LP-Bridge, SteppIR BiggIR antenna

[Larry Phipps]

  Hi John. First, make sure that you are using the top port on the 
SteppIR controller. Second, you can't use a standard cable. The SteppIR 
requires a special cable which you can make yourself. It needs to be 
3-wire null modem (crossover), with pins 79 tied together on the 
SteppIR side. Here is a rough sketch of how it works...

SteppIR end ...  PC end
-
1 - 2
2 - 1
5 - 5
7
I
9

You can also try a Y cable on the K3 side of the USB adapter, but you'll 
have to set the baud rate in the SteppIR controller to 38,400 if that's 
possible. There are subtle advantages to using the LP-Bridge output, as 
long as you always have LP-Bridge running.

73,
Larry N8LP


On 1/11/2011 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Mon, 10 Jan 2011 23:25:59 -0500
 From: John Gaynardjgayn...@columbus.rr.com
 Subject: [Elecraft] K3, LP-Bridge, SteppIR BiggIR antenna
 To:elecraft@mailman.qth.net
 Message-ID:04ae01cbb147$a6087e80$f2197b...@columbus.rr.com
 Content-Type: text/plain; charset=us-ascii

 I have the LP-Bridge functioning with the logger.  I now need to get it
 working with the SteppIR.  The K3 connects to the computer via the COM1
 port.  I have the current  K3 USB serial cable connected to the SteppIR via
 COM9 port  using a serial extension cable with DB9 F to DB9F adapter to
 match up with the DB9M connector on the K3 USB cable.  The SteppIR is set to
 Kenwood command set and 4800bps.  The SteppIR is not responding to frequency
 changes on the K3.  I see the USB serial output on the LP-Bridge port
 display.



 John K8WDN

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Re: [Elecraft] An AGC story

[Larry Phipps]

  I have been talking with Dick Dievendorf about changes to the K3 
Utility and LP-Bridge to allow most of the utility functionality to work 
(not including firmware revisions, however). This should benefit other 
utilities as well. The problem is finding time for changes and testing.

Larry N8LP



On 12/10/2010 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Fri, 10 Dec 2010 03:39:04 -0800 (PST)
 From: Barry N1EUbarry.n...@gmail.com
 Subject: Re: [Elecraft] An AGC story
 To:elecraft@mailman.qth.net
 Message-ID:1291981144656-5822793.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii



 David Gilbert wrote:
   
   Nice program, but it doesn't run with LP-Bridge if I want to have more
   than one application (N1MM, CW Skimmer, K3_EZ, etc)  interfacing with my
   K3.  It is fine for simplifying the changing of AGC settings, but not on
   the fly during a contest.
   
 I strongly agree.  There's a great need for some simple utilities for the K3
 that will run with LP-Bridge or other CAT port sharing schemes:  AGC/EQ
 management, expanded rig display, subrx control (avoid BSET), etc

 Barry N1EU

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Re: [Elecraft] Fwd: New Sherwood report

[Larry Phipps]

  I wondered when somebody would comment on that. It seems like it's at 
least a tie.

Larry N8LP


On 12/5/2010 5:15 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Wed, 01 Dec 2010 15:23:28 -0500
 From: Joe Subich, W4TVli...@subich.com
 Subject: Re: [Elecraft] Fwd: New Sherwood report
 To:elecraft@mailman.qth.net
 Message-ID:4cf6aec0.2090...@subich.com
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed


 Interesting ... why does Rob put the FT-5000 above the K3?

 2 KHz IMDDR are the same (101 dB) ... FT-5000 filter ultimate
 rejection is*poorer*  than the K3, LO noise is*poorer*  than
 the K3, 100 KHz blocking is*poorer*  than the K3.  Sensitivity
 and noise floor are comparable depending on which preamp is
 active on each radio ... with no preamp the K3 has a lower
 noise floor and greater sensitivity.

 Maybe I'm biased but I would still rate the K3 numero uno ..

 73,

  ... Joe, W4TV

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Re: [Elecraft] K3/SV/SDR-IQ/VSPE

[Larry Phipps]

  I can't speak to SV issues, but almost all issues related to LP-Bridge 
can be traced to a USB-to-serial adapter problem, either with the 
adapter, a self powered USB hub or a driver problem. It is always 
advisable to use a motherboard or PCI board serial port if possible. For 
USB adapters, my experience and that of my users seems to point to a 
preference for adapters with FTDI chipsets. Also, many users have 
reported good success with Digi Edgeport adapters, which can be found 
cheaply on eBay.

Larry N8LP




On 11/29/2010 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Sun, 28 Nov 2010 20:18:56 -0800 (PST)
 From: N1JMjohnn...@gmail.com
 Subject: Re: [Elecraft] K3/SV/SDR-IQ/VSPE
 To:elecraft@mailman.qth.net
 Message-ID:1291004336158-5783241.p...@n2.nabble.com
 Content-Type: text/plain; charset=us-ascii


 K3/SV/SDR-IQ/LP-Bridge  works super on my Win7 PC but on my laptop with
 XP(Macbook Pro with bootcamp) it causes BSOD.
 -- View this message in context: 
 http://elecraft.365791.n2.nabble.com/K3-SV-SDR-IQ-VSPE-tp5782232p5783241.html 
 Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[Larry Phipps]

  'Yup, as far as I can tell, and also for any BW on 12, 10 or 6m.

Larry N8LP


On 11/15/2010 3:33 PM, James Sarte wrote:
 This is one thing I don't understand with the TS-590s:

 For 1.8/3.5/7/14/21MHz amateur bands, when receiving in CW/FSK/SSB 
 modes down conversion is selected automatically if the final passband 
 is 2.7kHz or less

 So does that mean if the passband selected is greater than 2700 Hz, 
 the receiver switches to upconversion?!?

 James K2QI

 On Mon, Nov 15, 2010 at 3:23 PM, N8LP n...@telepostinc.com 
 mailto:n...@telepostinc.com wrote:


 The panadapter limitations are easily taken care of with a 3rd party
 panadapter. FT5K versions are among the top 4 selling versions of
 LP-PAN.
 They were smart enough to include a built in IF output. More than
 I can say
 for Kenwood, who not only didn't provide an IF output jack on
 their latest
 offering, but came up with perhaps the goofiest conversion scheme
 I have
 seen in a long time.

 Larry N8LP




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[Elecraft] Panadapters - need for bandmap capability

[Larry Phipps]

   Scott, WU2X, the author of PowerSDR/IF and I have discussed this a 
number of times. He is interested in doing it, but I don't know if or 
when it might show up. The current priority is merging his version up to 
the 2.0 release from Flex Radio, which is theoretically due out soon 
(been in beta for quite some time). I'm sure that if it happens, it 
would be an option, since many would not want the clutter.

73,
Larry N8LP



On 11/8/2010 1:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Mon, 8 Nov 2010 14:10:50 +
 From: Barry N1EUbarry.n...@gmail.com
 Subject: [Elecraft] Panadapters - need for bandmap capability
 To: elecraftElecraft@mailman.qth.net
 Message-ID:
   aanlktimxq8=m26dvt2tv5pt4ymgcsdoxjgxxw4djg...@mail.gmail.com
 Content-Type: text/plain; charset=UTF-8

 I'm offering this as food for thought.  It seems that one important feature
 that panadapters (SDR, LP-PAN, P3, etc) lack is the inability to tag a
 spectral trace with a callsign to mark its identity.  For example, check
 this mockup:http://n1eu.com/bndmp_spec.jpg

 If I qsy to a trace I see on a busy band, I want to be able to ID that trace
 so I don't keep coming back to it.  And those ID'd callsigns by trace
 frequency would constitute a bandmap.  Ultimately, this bandmap could have
 the same functionality as the bandmap in a contest logger (e.g., N1MM).
 It's just rotated 90 degrees and has freq interval spacing aligned with the
 panadapter waterfall display.  This ID'd panadapter functionality would be
 immensely useful in both unassisted and assisted contesting.  I realize that
 development of this capability might require unique collaboration between
 several software/hardware vendors but it would fundamentally enhance
 panadapter-centric operating.

 (CW Skimmer provides some of this capability, but it's totally limited to
 callsigns decoded by Skimmer, not by the operator, etc.)

 73,
 Barry N1EU

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Re: [Elecraft] Elecraft Digest, Vol 78, Issue 8

[Larry Phipps]

  A couple of further comments, Bob...

There are pictures of the K2 BFO leakage being displayed in PowerSDR/IF 
through LP-PAN using the two connection points that you can compare to 
each other and also to the results you are seeing. They are in the K2 
installation manual for the Z1,

http://www.cliftonlaboratories.com/Documents/Installing%20the%20Z1B-K2%20In%20an%20Elecraft%20K2%20Transceiver.pdf

Since the connection that reduces the K2 leakage the most also reduces 
sensitivity a bit, if you try LP-PAN you might also want to get the new 
preamp option, which adds a high gain, low noise preamp to the front end 
of LP-PAN.

Larry N8LP




On 10/5/2010 9:10 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Tue, 05 Oct 2010 14:39:26 -0400
 From: Jack Smithjack.sm...@cliftonlaboratories.com
 Subject: Re: [Elecraft] Softrock vs. LP-PAN
 To:elecraft@mailman.qth.net,rbsolo...@verizon.net
 Message-ID:4cab70de.5090...@cliftonlaboratories.com
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Bob:

 There are two possible 'spike' concerns here.

 One is the so-called 'zero' point spike in the software defined
 receivers. This is mostly a function of ground loops between the sound
 card and the Softrock. It can be removed by transformers or some careful
 work with the audio cables and connections. This spike will be located
 at the Softrock center frequency and will be present whether or not the
 Softrock is connected to the K2. The LP-PAN has transformers but similar
 transformers can be externally added to a Softrock.

 The second spike is BFO leakage from the K2 back into the panadapter.
 This spike will shift slightly in frequency as USB or LSB or CW CW-R is
 selected.  This spike is radiated from the K2 for reasons that are
 discussed at my web page
 http://www.cliftonlaboratories.com/k2_interface.htm  and in the Z1B
 buffer amplifier K2 installation instructions.
 http://www.cliftonlaboratories.com/Documents/Installing%20the%20Z1B-K2%20In%20an%20Elecraft%20K2%20Transceiver.pdf
 It will be present at the same level in any panadapter connected to the
 K2, whether it is the LP-PAN or Softrock, one of my HP spectrum
 analyzers or, for that matter, a P3.

 However, the strength of the leakage signal depends upon where the
 Z1B buffer amplifier obtains its IF sample. The Z1B K2
 installation instructions suggest two possible sample points, one at the
 output from the post mixer amplifier and the second at the input to the
 post mixer amplifier. There are plus and minus points with respect to
 each possible connection point, but the BFO leakage will be much reduced
 if the connection is made at the input to the post mixer amplifier, as
 the post mixer amplifier provides additional BFO leakage isolation. The
 Z1B K2 installation instructions show examples of leakage with both
 connection points.

 Additionally, I suspect some variation in BFO leakage level is possible
 depending on cable routing and the like.

 Jack K8ZOA
 www.cliftonlaboratories.com



 As the
 On 10/5/2010 2:19 PM, Bob wrote:
   I've been using a K2 IF version of V6.2 Softrock Lite as a pandapter
   interface with my K2, and the results are OK but not great - among other
   things, the K2 IF is very prominent on the screen. How much improvement
   could I expect if I replace the Softrock with an LP-PAN? (I have a Z1
   buffer amp in my K2, I'm using an E-MU 0202 sound card and I'm using
   PowerSDR-IF software in my computer).
 
   Thanks,
 
   Bob W1SRB

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[Elecraft] K2 and panadapter add-on in CQ

[Larry Phipps]

  I haven't seen this, but a number of K2 owners have added LP-PAN to 
their rig using the Z1 buffer kit from Clifton Laboratories 
(www.cliftonlaboratories.com). Jack Smith, K8ZOA, has full installation 
instructions in the Z1 manual for two versions of the mod... one 
that he did to his K2 and one that I did to mine.

73,
Larry N8LP



On 10/1/2010 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Date: Thu, 30 Sep 2010 14:46:01 -0400
 From: H. Caryh3c...@gmail.com
 Subject: [Elecraft] K2  and panadapter add-on in CQ
 To:elecraft@mailman.qth.net
 Cc: 'DR.R.B. GOBER'rbg...@yahoo.com
 Message-ID:003801cb60cf$bbec1860$33c449...@com
 Content-Type: text/plain; charset=US-ASCII

 K2 Owners-
 The new issue of CQ magazine (Oct 2010) has an interesting piece on adding
 panadapter capability to a K2, including color photo of the buffer amp
 installation.  You can find it on pages 80-81 - under the heading
 Repurposing a Softrock - very interesting!
 73,
 H Cary, K4TM
 K2-100 #4991
 K3-100 #3448

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Re: [Elecraft] LP-Pan and Rocky (was: SDR with a Twist)

[Larry Phipps]

  Sure, it can be used with any SDR app.

Larry N8LP



On 7/23/2010 12:00 PM, elecraft-requ...@mailman.qth.net wrote:
 Message: 2
 Date: Fri, 23 Jul 2010 07:51:39 +0200
 From: Jon K?re Hellanhel...@acm.org
 Subject: [Elecraft] LP-Pan and Rocky (was:  SDR with a Twist)
 To:elecraft@mailman.qth.net
 Message-ID:4c492deb.3010...@acm.org
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 On 07/23/2010 01:17 AM, Steve Ellington wrote:
   Gosh I though someone had filed for documents under the Freedom of
   Information Act. But whatever, this sounds like a good scheme. You're 
  right
   about PwrSDR being a resource hog. I had to get a dual core cpu just to 
  run
   LP Pan smoothly.
 Can Rocky be used with LP-PAN?

 Jon LA4RT

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Re: [Elecraft] LP-100A MCLoader program

[Larry Phipps]

Hi Matt. I sent the file on 7-10. Apparently hotmail didn't accept the 
attachment based on your next email, so I sent it again on 7-11 a different 
way. Then on 7-13 you sent another email which indicated to me that you were 
probably not getting any of my messages, even though I was not getting bounced 
messages from your ISP. Your SPAM filter must be blocking them, even the ones 
without attachments. I then sent an email which included a link to the file so 
that you could download it from my website, and apparently you did not receive 
this one either. Check your trash folder in your email client and I'm sure 
you will find some of these messages. 

Anyway, you can download it here,
www.telepostinc.com/Files/mcloader.zip

Please let me know when you have it.

73,
Larry N8LP


Date: Wed, 14 Jul 2010 20:26:35 -0700
From: Matt Zilmer mzil...@verizon.net
Subject: [Elecraft] LP-100A MCLoader program
To: Elecraft@mailman.qth.net
Message-ID: 9qvs361erq9l3ogtustt9aqn0q0rm0d...@4ax.com
Content-Type: text/plain; charset=us-ascii

Does anyone have the MCLoader program for the TelePost LP100 or -100A?
I am unable to obtain it from TelePost.  Guess Larry's too busy; I've
tried him via email several times on this.

Please send direct to mzil...@verizon.net.

73 and TNX,
matt W6NIA
K3 #24
K2 #2810





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Re: [Elecraft] Fwd: [FlexEdge] Field Day, Focus and Contest, Skins?

[Larry Phipps]

If you set all of the keyboard shortcuts in the PowerSDR/IF 
SetupKeyboard tab to none, then typing while you're in the focus of 
the panadapter will not get you in trouble. You could still use 
shortcuts if you are careful to avoid any key that your logger uses as a 
shortcut, or any letter or number key which might be used to enter a 
callsign. In my case, I run N1MM in contests, and I can enter data, tab 
through the entries, etc. even while my mouse is hovering over the pan 
display. I use a mouse utility called WizMouse to allow the focus to 
follow the mouse without clicking. After saving the contact, I can click 
on another signal and the N1MM entry boxes are cleared and ready to 
accept new data.

I find that it also helps to run PowerSDR in collapsed mode to 
eliminate clutter. This mode is not available in the Flex releases of 
PowerSDR.

It may not be a 100% solution, but it's pretty good and you won't risk 
having the rig jumping around in frequency if you type while in the 
focus of the panadapter. And as I said, with N1MM the text even shows up 
in the call sign entry box as you would want.

73,
Larry N8LP



 Date: Mon, 28 Jun 2010 12:54:03 -0700
 From: Brett Howard br...@livecomputers.com
 Subject: Re: [Elecraft] Fwd: [FlexEdge] Field Day, Focus and Contest
   Skins?
 To: Lyle Johnson k...@wavecable.com
 Cc: Elecraft Group elecraft@mailman.qth.net
 Message-ID:
   aanlktineroz9lybqm-gavbmc8oilf7cwbhk2kft9-...@mail.gmail.com
 Content-Type: text/plain; charset=ISO-8859-1

 I actually had a similar experience however our guys were using the K3
 an LP-PAN and PowerSDR I/F.  They'd go to enter the callsign and the
 number of the call would send you off to that frequency.  Not to
 mention that we were in a white automotive tent which made it quite
 bright inside there and it was tough to see the mouse cursor for some
 of the ops.

 ~Brett (N7MG)

 On Mon, Jun 28, 2010 at 12:49 PM, Lyle Johnson k...@wavecable.com wrote:
   
  ?I think you'll find this interesting.
 
  Lyle

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Re: [Elecraft] Fwd: [FlexEdge] Field Day, Focus and Contest, Skins?

[Larry Phipps]

Hi Steve. Go to the PowerSDR/IFSetupGeneral tab and select the Options 
tab on the second row. In the Keyboard section, uncheck  Quick QSY 
and then uncheck Enable Shortcuts.

Larry N8LP



Steve Ellington wrote:
 The below is correct except for the number 5. I set all my keyboard 
 shortcuts to 'none' but if I hit 5 the K3 jumps to 6 meters!

 If you set all of the keyboard shortcuts in the PowerSDR/IF
 SetupKeyboard tab to none, then typing while you're in the focus of
 the panadapter will not get you in trouble. 
 Steve
 N4LQ
 - Original Message - From: Larry Phipps n...@telepostinc.com
 To: elecraft@mailman.qth.net
 Sent: Tuesday, June 29, 2010 2:07 AM
 Subject: Re: [Elecraft] Fwd: [FlexEdge] Field Day, Focus and Contest, 
 Skins?


 If you set all of the keyboard shortcuts in the PowerSDR/IF
 SetupKeyboard tab to none, then typing while you're in the focus of
 the panadapter will not get you in trouble. You could still use
 shortcuts if you are careful to avoid any key that your logger uses as a
 shortcut, or any letter or number key which might be used to enter a
 callsign. In my case, I run N1MM in contests, and I can enter data, tab
 through the entries, etc. even while my mouse is hovering over the pan
 display. I use a mouse utility called WizMouse to allow the focus to
 follow the mouse without clicking. After saving the contact, I can click
 on another signal and the N1MM entry boxes are cleared and ready to
 accept new data.

 I find that it also helps to run PowerSDR in collapsed mode to
 eliminate clutter. This mode is not available in the Flex releases of
 PowerSDR.

 It may not be a 100% solution, but it's pretty good and you won't risk
 having the rig jumping around in frequency if you type while in the
 focus of the panadapter. And as I said, with N1MM the text even shows up
 in the call sign entry box as you would want.

 73,
 Larry N8LP



 Date: Mon, 28 Jun 2010 12:54:03 -0700
 From: Brett Howard br...@livecomputers.com
 Subject: Re: [Elecraft] Fwd: [FlexEdge] Field Day, Focus and Contest
 Skins?
 To: Lyle Johnson k...@wavecable.com
 Cc: Elecraft Group elecraft@mailman.qth.net
 Message-ID:
 aanlktineroz9lybqm-gavbmc8oilf7cwbhk2kft9-...@mail.gmail.com
 Content-Type: text/plain; charset=ISO-8859-1

 I actually had a similar experience however our guys were using the K3
 an LP-PAN and PowerSDR I/F.  They'd go to enter the callsign and the
 number of the call would send you off to that frequency.  Not to
 mention that we were in a white automotive tent which made it quite
 bright inside there and it was tough to see the mouse cursor for some
 of the ops.

 ~Brett (N7MG)

 On Mon, Jun 28, 2010 at 12:49 PM, Lyle Johnson k...@wavecable.com 
 wrote:

  ?I think you'll find this interesting.
 
  Lyle

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Re: [Elecraft] time to order your P3, design details?

[Larry Phipps]

That version of PowerSDR is not optimized for panadapter use. Like 
anything, there are a variety of SDR programs around. The latest 
PowerSDR/IF Stage svn from WU2X  W1CEG can fill the screen with just 
the pan display (or waterfall or panafall). You can also add a 
VFO/S-Meter strip and/or Band/Mode buttons. No clutter, huge pan 
display, just the most needed controls. Here are some examples...

http://www.telepostinc.com/psdr35_collapsed_2a.png
http://www.telepostinc.com/DSCN0583f.jpg

73,
Larry N8LP



 Date: Mon, 19 Apr 2010 11:26:09 -0700 (PDT) From: Al Lorona 
 alor...@sbcglobal.net Subject: Re: [Elecraft] time to order your P3, 
 design details? To: elecraft@mailman.qth.net Message-ID: 
 990531.32803...@web82607.mail.mud.yahoo.com Content-Type: 
 text/plain; charset=iso-8859-1
 ?To get you started, look at ... 
  http://www.youtube.com/watch?v=q_Fom1QwNa4feature=related ?
 

 That is really pretty, but?my prevailing thought was that perhaps it's just 
 too much eye candy-- which really doesn't?make interpreting the?data any 
 easier. The spectrum readout-- arguably the most important area of the 
 screen-- is difficult to concentrate on with the distraction of the other 
 detail (color, shading, texture, 3D effects, text, labels, buttons, controls) 
 of the skin.

 I really believe?simpler is better. Let me illustrate by example. The last 
 time you flew on a Boeing 767 this is what the pilots saw on the flight deck:
 http://www.airliners.net/photo/Continental-Airlines/Boeing-767-424-ER/070/sid=0444c7e1280e36facb8845d82b29142f??
  

 Many?of you?would perhaps laugh at such a?simplistic 1970s display and would 
 find excuses not to pay money for it in 2010.?But this is certainly a 
 mission-critical application where simpler displays mean quick, efficient 
 interpretation by the pilots in whose hands we place our lives. They gotta be 
 able to glance and read the situation instantly, without having to twiddle or 
 read a lot of controls. 

 I know I'm comparing apples and oranges. And I know I'm sounding like an old 
 guy. But the trend in radios-- whether traditional or SDR-- is certainly 
 going towards more and more eye candy. These fancier and fancier GUIs (and 
 front panels) can start to make one dizzy. If it doesn't have at least?four 
 blue LEDs and?two or three?irregular-shaped pink buttons, people won't buy 
 it, I guess!

 The display of the P3 shares many characteristics with the 767 display. 
 Without getting into any of the pro-computer/ anti-computer arguments, this 
 is one reason why I like the way the P3 has been laid out.

 I kinda like simple and uncluttered. If it's good enough for the captain of a 
 767, it's good enough for me.

 --

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Re: [Elecraft] LP-PAN and other SDR

[Larry Phipps]

Phil, is this the case for all bands, or just 2m? If it's all bands, 
make sure that the little cable that connects the K3 IF buffer to the 
rear panel connector is seated properly. Also, make sure all the 
applicable modules are enabled in Setup.

Larry N8LP




 Date: Fri, 09 Apr 2010 11:25:35 -0400
 From: Phil LaMarche plama...@verizon.net
 Subject: [Elecraft] LP-PAN and other SDR
 To: Elecraft@mailman.qth.net
 Cc: lp-...@yahoogroups.com
 Message-ID: 56fa9e417074492f951c1e3d263e8...@lamarcheenterpr
 Content-Type: text/plain;charset=US-ASCII

 Got my K3 back after having the 144 module installed and all hardware
 updates done.  Works wonderful except for one aspect.  I have several SDR
 platforms to use and in every one, the panadaptor base line is below the
 -140 and I can't see the signals.  Worked fine before.  Any ideas?
  
 Phil
  
 Philip LaMarche
  
 LaMarche Enterprises, Inc
  
 727-944-3226
 727-937-8834 Fax
 727-510-5038 Cell  
 www.w9dvm.com http://www.w9dvm.com/  
 K3 #1605
  
 CCA 98-00827
 CRA 1701
 W9DVM
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[Elecraft] LP-PAN and other SDR

[Larry Phipps]

Phil, is this the case for all bands, or just 2m? If it's all bands, make sure 
that the little cable that connects the K3 IF buffer to the rear panel 
connector is seated properly. Also, make sure all the applicable modules are 
enabled in Setup.

Larry N8LP




 Date: Fri, 09 Apr 2010 11:25:35 -0400
 From: Phil LaMarche plama...@verizon.net
 Subject: [Elecraft] LP-PAN and other SDR
 To: Elecraft@mailman.qth.net
 Cc: lp-...@yahoogroups.com
 Message-ID: 56fa9e417074492f951c1e3d263e8...@lamarcheenterpr
 Content-Type: text/plain; charset=US-ASCII

 Got my K3 back after having the 144 module installed and all hardware
 updates done.  Works wonderful except for one aspect.  I have several SDR
 platforms to use and in every one, the panadaptor base line is below the
 -140 and I can't see the signals.  Worked fine before.  Any ideas?
  
 Phil
  
 Philip LaMarche
  
 LaMarche Enterprises, Inc
  
 727-944-3226
 727-937-8834 Fax
 727-510-5038 Cell 
  
 www.w9dvm.com http://www.w9dvm.com/ 
  
 K3 #1605
  
 CCA 98-00827
 CRA 1701
 W9DVM

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Re: [Elecraft] Elecraft K3 with K2 as station panadapter, setup?

[Larry Phipps]

You could use one of the Output ports in LP-Bridge to drive the K2. 
It's a one-way port, but the K2 should follow the K3 in this mode. You 
will need a null modem adapter at the PC end of the cable to reverse the 
serial lines. The K2 end uses custom wiring as shown in the manual. Set 
the K2 to 4800 baud. 73, Larry N8LP Message: 19 Date: Wed, 07 Apr 2010 
10:07:33 -0400 From: Don Wilhelm w3...@embarqmail.com Subject: Re: 
[Elecraft] Elecraft K3 with K2 as station panadapter setup? To: Sam 
Morgan k5oai@gmail.com Cc: elecraft@mailman.qth.net 
elecraft@mailman.qth.net Message-ID: 4bbc91a5.4030...@embarqmail.com 
Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sam, To 
listen with both the K2 and K3 at the same time and with the same 
antenna, You could use something external to the K3 - think SO2R setup, 
or at least a subset of SO2R. With the KXV3, there is the RX ANT Out 
connector - but that is only connected to the antenna when the RX ANT is 
selected. With a 3 dB splitter placed there, you could connect one 
splitter output to RX ANT IN and the other splitter output to the K2. 
You would loose 3 dB in each receiver, but that may not be a problem for 
the application you are trying to use. On the K3, you can quickly 
recover that 3 dB by taking it out of RX ANT with a button tap - you 
would lose reception on the K2, but have full sensitivity on the K3. I 
believe you would have to run 2 copies of HRD, one to control the K3 and 
another to control the K2 - I don't know how you get two instances of 
HRD to track frequency wise, so that is for you to solve. Yes, LP-Bridge 
*may* be helpful, but in any case, you will need two physical serial 
ports, one for the K2 and one for the K3, LP-Bridge does not split on 
the K3 side, only on the application side. 73, Don W3FPR Sam Morgan wrote:

  I want to use both my K3 and my K2
  at the same time, on the same frequency and antenna.
  I wish to TX and RX on the K3.
  I also wish to use my K2,
  which has a softrock being use with PowerSDR/IF as a panadapter,
  as just that, a panadapter on the same frequency using the same antenna.
 
  I'm sure this is a relatively simple thing to do,
  but my aging gray matter just switches to the
  'you want to do wat?' mode
  and I end up in an endless loop of
  how to connect all this
  and not hurt any of the equipment involved.
 
  All physical connections are with serial cables to a desktop rig.
  I have both HRD 5.0 and DXLabs, but prefer using HRD.
  I use PowerSDR/IF for the panadapter display.
 
  I have heard of some virtual serial ports or bridges,
  but am clueless as to what, which, or how to involve it/them.
 
  TIA

 
   
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Re: [Elecraft] Need to select a dummy load for K3 TX, calibration...(advice?)

[Larry Phipps]

I agree with everything that's been said about the Ridge loads. I have been 
recommending them for a couple years to customers of the LP-100A kit for use in 
calibration. One note: make sure you have an appropriate BNC to N adapter as 
their loads tend to all have N connectors (usually male).

73,
Larry N8LP



Date: Wed, 24 Feb 2010 13:00:02 -0500
From: Don Wilhelm w3...@embarqmail.com
Subject: Re: [Elecraft] Need to select a dummy load for K3  TX
calibration...(advice?)
To: Don Nelson n...@comcast.net
Cc: elecraft@mailman.qth.net
Message-ID: 4b856922.7030...@embarqmail.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Don,

He is *offering* it up for bid at a starting price of $9.99 - that is 
not the same as selling it.  Who knows the bidding may go up to $50 
before the 3 days have ended.

So many people tell me about things like that quoting the bid price, but 
when I look, the price is always higher.  Please clarify if it is a 
bidding price or a selling price (as in BUY NOW)

BTW, the Ridge Equipment dummy loads are very good.  Too bad they no 
longer have the 200 watt load nearly flat up to 1 GHz.  I should have 
gotten 2 or 3 instead of only one.

73,
Don W3FPR

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Re: [Elecraft] Elecraft Digest, Vol 70, Issue 36

[Larry Phipps]

I have been corresponding recently with Dick Dievendorff about this. I 
am looking into allowing K3 Utility to work through LP-Bridge. The issue 
has to do with K3 Utility needing to be able to change one of the meta 
commands in the K3, which is normally blocked by LP-Bridge to prevent 
multiple applications from independently changing meta commands which 
might conflict with other apps.

If I do this, it will add a check box for the VPort where K3 Utility is 
connected, and I would still strongly recommend that flashing of new 
firmware NOT be done through LP-Bridge.

73,
Larry N8LP






Date: Thu, 18 Feb 2010 11:01:57 -0800 (PST)
From: Bob - W0GI b...@gotoloveland.com
Subject: [Elecraft] K3 Utility and LP-Bridge - Correction
To: elecraft@mailman.qth.net
Message-ID: 1266519717347-4593636.p...@n2.nabble.com
Content-Type: text/plain; charset=us-ascii


While setting up LP-Bridge, I assumed the the K3 Utility would work ok as
Test Communications worked ok, and the firmware page was showing my
versions.  But I have found other functions do no work.

Looking at the LP-Bridge page I found this.

Some commands are intenionally blocked altogether. For this reason, the K3
Utility should not be used with LP-Bridge.

Mommy always told me to read the manual first. :)

That said, my previous posts on using K3Util with LP-Bridge are incorrect.

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[Elecraft] K3 Utility and LP-Bridge - Correction

[Larry Phipps]

I have been corresponding recently with Dick Dievendorff about this. I 
am looking into allowing K3 Utility to work through LP-Bridge. The issue 
has to do with K3 Utility needing to be able to change one of the meta 
commands in the K3, which is normally blocked by LP-Bridge to prevent 
multiple applications from independently changing meta commands which 
might conflict with other apps.

If I do this, it will add a check box for the VPort where K3 Utility is 
connected, and I would still strongly recommend that flashing of new 
firmware NOT be done through LP-Bridge.

73,
Larry N8LP






Date: Thu, 18 Feb 2010 11:01:57 -0800 (PST)
From: Bob - W0GI b...@gotoloveland.com
Subject: [Elecraft] K3 Utility and LP-Bridge - Correction
To: elecraft@mailman.qth.net
Message-ID: 1266519717347-4593636.p...@n2.nabble.com
Content-Type: text/plain; charset=us-ascii


While setting up LP-Bridge, I assumed the the K3 Utility would work ok as
Test Communications worked ok, and the firmware page was showing my
versions.  But I have found other functions do no work.

Looking at the LP-Bridge page I found this.

Some commands are intenionally blocked altogether. For this reason, the K3
Utility should not be used with LP-Bridge.

Mommy always told me to read the manual first. :)

That said, my previous posts on using K3Util with LP-Bridge are incorrect.

-- 
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Re: [Elecraft] Elecraft Digest, Vol 69, Issue 53

[Larry Phipps]

I think you'll find that the FW card takes fewer resources than a USB card, at 
least that's what I've found as a general rule. On my system anyway, the PCI 
sound cards take the least resources, followed by FW, followed by USB. The same 
is generally true of serial ports. If you have a desktop PC, always lean 
towards PCI interfaces rather than USB if you have the slots to do so.

FWIW, I have 6 sound cards installed on a 2.8GHz P4 without problems, but the 
USB cards add about 50% to the CPU load when they're running.

Larry N8LP



Date: Sat, 30 Jan 2010 11:35:17 -0800 (PST)
From: Wes Stewart n...@yahoo.com
Subject: Re: [Elecraft] [OT] PCI Express sound card for digimodes
To: w...@q.com
Cc: elecraft@mailman.qth.net, G4ILOJulian julian.g4...@gmail.com
Message-ID: 262124.96639...@web52303.mail.re2.yahoo.com
Content-Type: text/plain; charset=iso-8859-1

Hi Lance,

Hmmm... I don't think so.  The computer has a 2.3 GHz Core2 Duo processor and 2 
GB of RAM.  As I said, but not clearly enough, I gave up on the LP-Pan (for now 
anyway) so it wasn't running.  The only thing running was whichever RTTY/log 
software and Firefox, which I use for looking at Internet spots.  Since in some 
of these contests I was in an unassisted category, even that wasn't always open.

Regards,

Wes

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Re: [Elecraft] Elecraft Digest, Vol 69, Issue 53

[Larry Phipps]

My comment didn't address built-in (integrated motherboard) sound cards. 
I haven't had any trouble testing them, but don't actually use them 
except for desktop PC sounds and such.

73,
Larry N8LP



Wes Stewart wrote:
 I'm sure you're correct, but I went to the FW card because of problems with 
 the built-in sound card.  Presumably that had the least overhead of all.

 Wes  N7WS

 --- On Sun, 1/31/10, Larry Phipps n...@telepostinc.com wrote:

   
 From: Larry Phipps n...@telepostinc.com
 Subject: Re: [Elecraft] Elecraft Digest, Vol 69, Issue 53
 To: elecraft@mailman.qth.net
 Date: Sunday, January 31, 2010, 6:56 AM
 I think you'll find that the FW card
 takes fewer resources than a USB card, at least that's what
 I've found as a general rule. On my system anyway, the PCI
 sound cards take the least resources, followed by FW,
 followed by USB. The same is generally true of serial ports.
 If you have a desktop PC, always lean towards PCI interfaces
 rather than USB if you have the slots to do so.

 FWIW, I have 6 sound cards installed on a 2.8GHz P4 without
 problems, but the USB cards add about 50% to the CPU load
 when they're running.

 Larry N8LP



 Date: Sat, 30 Jan 2010 11:35:17 -0800 (PST)
 From: Wes Stewart n...@yahoo.com
 Subject: Re: [Elecraft] [OT] PCI Express sound card for
 digimodes
 To: w...@q.com
 Cc: elecraft@mailman.qth.net,
 G4ILOJulian julian.g4...@gmail.com
 Message-ID: 262124.96639...@web52303.mail.re2.yahoo.com
 Content-Type: text/plain; charset=iso-8859-1

 Hi Lance,

 Hmmm... I don't think so.  The computer has a 2.3 GHz
 Core2 Duo processor and 2 GB of RAM.  As I said, but
 not clearly enough, I gave up on the LP-Pan (for now anyway)
 so it wasn't running.  The only thing running was
 whichever RTTY/log software and Firefox, which I use for
 looking at Internet spots.  Since in some of these
 contests I was in an unassisted category, even that wasn't
 always open.

 Regards,

 Wes

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Re: [Elecraft] [OT] PCI Express sound card for digimodes

[Larry Phipps]

My system is a 5-year old single processor P4. I think that has a lot to do 
with it. Plus, I'm running the latest PowerSDR and CW Skimmer to get to these 
numbers. Still, the USB sound card produces double the load of my PCI sound 
cards.

Larry N8LP




Date: Sun, 31 Jan 2010 11:02:03 -0800 (PST)
From: Leigh L. Klotz Jr WA5ZNU le...@wa5znu.org
Subject: Re: [Elecraft] Elecraft Digest, Vol 69, Issue 53
To: elecraft@mailman.qth.net
Message-ID: 1264964523136-4490521.p...@n2.nabble.com
Content-Type: text/plain; charset=us-ascii


This may be OS dependent, or it may be due to hidden sample rate conversions
in the drivers.
I use the EMU-0202 with Quisk for LP-PAN and Griffin iMic with fldigi
simultaneously on Linux and don't notice this level of CPU load at all. 

Leigh/WA5ZNU

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Re: [Elecraft] K3 software utility needed

[Larry Phipps]

LP-Bridge allows simultaneous polling (GET) commands from 5 applications 
at the same time with no limitations. The only possible issue is 
multiple SET commands at the same time, which is an unlikely occurrence. 
The traffic to/from the K3 is almost constant, regardless of the number 
of applications requesting data.

73,
Larry N8LP


 Date: Thu, 10 Dec 2009 12:24:57 -0500
 From: Joe Subich, W4TV li...@subich.com
 Subject: Re: [Elecraft] K3 software utility needed
 To: n...@nf4l.com,  'Monty Shultes' mon...@mindspring.com
 Cc: 'elecraft@mailman.qth.net' Elecraft@mailman.qth.net
 Message-ID: 5d24e970c6ee496ab7e84818cd38d...@laptop
 Content-Type: text/plain; charset=us-ascii


 Unless you are using LP-Pan for its panadapter functions, LP-Bridge 
 is probably overkill.  The free Enterlogic VSPE port splitter will 
 create multiple virtual ports that share a single real port (USB 
 or motherboard) and allow multiple applications to access the K3 
 simultaneously.  

 Note, with multiple applications there are limitations ... the total 
 polling load can not exceed the processing capability of the K3 
 controller.  In addition, each application must be able to ignore 
 responses to the other applications ... that is each application 
 may process the data (e.g., the IF; data) but unexpected data should 
 not be capable of confusing any application. 

 The most significant problem with multiple software access is the 
 case of multiple command strings.  It is nearly impossible to make 
 multiple command strings work in a shared access environment due  
 to the probability that a poll from one application will occur in 
 the middle of a command string from another application. 

 73, 

... Joe, W4TV 
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Re: [Elecraft] [MM] W2 connection problem - NZ0T Comment

[Larry Phipps]

LP-Bridge only works with K3. It is not a generic serial splitter, but more 
like a multi-port router with conditioning of the data.

73,
Larry N8LP



Date: Tue, 24 Nov 2009 14:52:48 -0800 (PST)
From: Julian, G4ILO julian.g4...@gmail.com
Subject: Re: [Elecraft] [MM]  W2 connection problem - NZ0T Comment
To: elecraft@mailman.qth.net
Message-ID: 1259103168822-4061795.p...@n2.nabble.com
Content-Type: text/plain; charset=us-ascii




NZ0T wrote:

  
  Hi Julian,
  
  It works just fine with the real serial port.  Works fine with the virtual
  port with the K3 but not with the W2.
  
   

Have you tried the demo version of this:
http://www.serialportsplitter.com/splitter.html ? It might help determine
whether the problem is with the emulation of VSPE or something else.

Unfortunately the only other free serial port splitter I know of is com0com
http://com0com.sourceforge.net/ and I couldn't get that to work at all.
There is also LP-Bridge http://www.telepostinc.com/LPB.html but that
emulates a K3 in memory and I don't know whether it would work with a W2.

-
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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Re: [Elecraft] LP-PAN Buffer Modification

[Larry Phipps]

Hi Chris. Just a little clarification. The mod only improves overall 
noise figure of a receiver connected to the IF output of the K3, by 
eliminating about 10dB of loss. It does not improve K3 receiver 
performance. The improvement is most noticeable with the K3 preamp OFF. 
When the K3 preamp is ON, the gain distribution limits the degradation 
of the loss that comes after it to a degree.

73,
Larry N8LP



 --
 Date: Fri, 14 Aug 2009 10:18:57 EDT
 From: w3...@aol.com
 Subject: [Elecraft] LP-PAN Buffer Modification
 To: elecraft@mailman.qth.net
 Message-ID: cdd.56be324f.37b6c...@aol.com
 Content-Type: text/plain; charset=US-ASCII

  
 Hello:
  
  While sniffing around the LP-PAN website _http://www.telepostinc.com/_ 
 (http://www.telepostinc.com/)   I  noticed a mod to the K-3 Buffer Amp that 
 is supposed to improve receiver  performance.  The instruction information 
 states that the modis not yet an  approved mod for the K3. Wayne has 
 indicated that it probably will be at some  point.  
  Can someone tell me if the mod has been approved  or incorporated into 
 production K-3's?  If the mod has been incorporated  into K-3's, what is 
 the starting serial number for incorporation?  
  Lastly, if someone who has done the mod has made  any before and after 
 measurements on receiver performance, can he or she kindly  publish the 
 results? 
  Thanks and 73.  Chris Patterson  W3CMP



 --
   

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Re: [Elecraft] K3 Serial Port

[Larry Phipps]

Eterlogic can work as long as the two programs don't poll much, reducing the 
chance of collisions. It takes all incoming data and mixes it together, which 
can cause lost or corrupted commands. It also sends all K3 responses to all 
connected programs, which can be a problem with some programs, which may not 
support all the incoming commands. Some programs also require a proper response 
to each command in sequence, and will be confused by a response that was not 
just polled for.

It is a very useful program for many things, though, and should make a good 
addition to LP-Bridge for some of the more exotic setups requiring bridges 
between programs and hardware, a second PC, etc. As long as the connection is 
one-to-one (or one-to-many under some circumstances) it should be fine, but I 
haven't tested it.

73,
Larry N8LP



Message: 18
Date: Mon, 30 Mar 2009 16:23:48 -0600
From: ni0c n...@earthlink.net
Subject: [Elecraft]  K3 Serial Port
To: elecraft@mailman.qth.net
Message-ID: 001c01c9b186$3377e800$f215f...@oemcomputer
Content-Type: text/plain;   charset=iso-8859-1

Another solution is provided by Eterlogic's Virtual Serial Port Emulator, 
a free download from Eterlogic's web site.  You can create a serial port
splitter, for using diifferent software programs that talk with the K3.

I use it to run DXBase 2007 and DXLab's Commander program
simultaneously.  

73,
Chuck  NI0C
K2/10 s/n 5853
K3/100 s/n 1061  



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Re: [Elecraft] Interesting!

[Larry Phipps]

Are you hearing them on both the K3 and LP-PAN?

73,
Larry N8LP



Phil LaMarche wrote:
 Tuning 10 meters with my K3 and looking at the LP Pan scope, I see AM 
 signals across the band.  Tuning to each one, it sounds like WWV with 
 the beep beep etc.  Any idea what is doing that?
  
 Phil
  

 Philip LaMarche
 LaMarche Enterprises, Inc.
 _www.instantgourmetspices.com_ http://www.instantgourmetspices.com/

 www.w9dvm.com http://www.w9dvm.com/
 800-395-7795 pin 02
 727-944-3226
 FAX 727-937-8834
 NASFT 30210

 K3  #1605

 CCA  AC98  00827
 W9DVM

  
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Re: [Elecraft] K3 receiver desensing on CW during contest

[Larry Phipps]

Not today... but give it a couple years. There is a lot of RD being 
poured into this by a number of competing chip manufacturers. Even if 
the next batch of designs falls a little short, an all digital design 
with BDR close to the best conventional designs would probably enjoy a 
very substantial market.

73,
Larry N8LP



Alan Bloom wrote:
 On Mon, 2009-02-23 at 18:40, N8LP wrote:
 ...
   
 I think the days of receivers with xtal filters are numbered. High speed
 ADCs capable of 140dB dynamic range without xtal filtering are on the
 horizon. A 20-bit ADC with enough processing gain would do it. 
 

 I don't think you'll find a 20-bit ADC with a high enough sample rate to
 digitize the 3-30 MHz HF band (i.e. 65-70 MHz or so).  At least not at
 a reasonable cost.

 I believe the best suitable, reasonable-cost ADCs available these days
 are able to achieve a 500-Hz blocking dynamic range in the low 120's dB,
 maybe 15-20 dB worse than the K3.  That's significantly better than the
 previous generation of ADCs could achieve, and no doubt someday we'll
 get even better parts that are good enough to challenge the traditional
 superhet/crystal filter architecture.  But I don't believe we're close
 to that level of performance today.

 Another issue, of course, is spurious responses.  I'm pretty sure that
 current ADCs don't have good enough spurious-free dynamic range to
 challenge a state-of-the-art receiver like the K3.

 Al N1AL



   
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Re: [Elecraft] Poor man's pan adapter - K2 Panadapter

[Larry Phipps]

The hardware is available to order now, and the LP-Bridge support for 
the reduced command set of the K2 will be ready in a few weeks. If you 
plan to order, use the standard order buttons and add a note that it's 
for K2.

73,
Larry N8LP



Jack Smith wrote:
 My understanding is that the LP-PAN for K2 is very close to release - 
 perhaps Larry can provide the official word.

 Jack


 Jim Campbell wrote:
 Jack,

 I'm glad that you have instructions for adding the Z1 to the K2,
 because I looked around and couldn't find my translation of the German
 instructions.  By the way, the setup works just fine but I don't use it
 too much.  I'm waiting hopefully for the K2 version of LP-Bridge (?) so
 that the frequency of the K2 would be shown on the PowerSDR scale.  Any
 news on LP-Bridge?

 73,

 Jim - W4BQP

 Jack Smith wrote:
  
 Jim:

 If you are going to extract an IF sample out of the K2, the Z1
 buffer amplifier can be installed inside the K2 with the internal
 installation option. This provides a convenient IF output with
 bandpass filtering, protected against short circuits on the IF sample
 port connector and with excellent  isolation--around 100 dB reverse
 gain when installed according to the instructions provided with the
 Z1 kit.

 There's an embarrassingly long manual with the details on installing
 the Z1 inside a K2 at
 http://www.cliftonlaboratories.com/elecraft_k3_and_panadapters.htm

 Jack K8ZOA
 www.cliftonlaboratories.com


 Jim Campbell wrote:

 Ron,

 I'm not familiar with the Conexant audio device.  However, many
 laptops do not have a stereo input such as a Line In.  The microphone
 input is usually mono.  You are going to need the stereo/line-in
 input in order to have the SDR work correctly.  If you don't have
 such an input on your laptop you will need an external USB audio
 adapter.  I am using the SoundBlaster X-Fi USB with my HP laptop.
 As a side note, I have added the Clifton Labs buffer amplifier
 (X-1 ?) to my K2 and am using one of the SoftRock Lites tailored
 for the K2 for a panadaptor.  Yes, I realize that the K2 doesn't
 provide an IF output, but I found that a K2-owner in Germany had
 tapped in to the K2 IF and had published the description (in German,
 naturally).  I think I have a translation of the article around here
 somewhere if anyone is interested.

 73,

 Jim - W4BQP
 K2 #2268

 Ron Midwin wrote:
  
 Fellow Elecraft enthusiasts,

  

 I just ordered the SoftRock Lite from Tony, KB9YIG, below.  I would
 like to be able to observe whatever bandwidth I can around any band
 I am working on my K-3.  Since this appears to be a compromise over
 the Pan Adapter that is available for ~$300, per Tony's suggestion
 I wonder if any of you have successfully tried this?  And how does
 it work?  FYI, I have an HP Pavilion dv9700 Notebook PC, AMD Turion
 X2 Mobile Technology TL-60  2.00 GHz, 2.00 GB Memory, 32 Bit Op
 System, with Vista.

  

 Not sure which sound card is built in.  Driver is Conexant High
 Definition Smart Audio 221, if that helps.

  

 73,

  

 RonAE6RH

  

  

 / /


 
  


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Re: [Elecraft] K3 ADAT ADT-200A by HB9CBU

[Larry Phipps]

Yes, it has been an informative thread indeed. I considered weighing in, 
but everything seemed to be covered in excellent detail. I will say 
that, based on my measurements, a much bigger issue today is transmitter 
performance rather than receiver performance. The main culprit is of 
course synthesizer noise, but splatter and key clicks are also 
contributors. I have pictures from my panadapter, which uses a xtal 
oscillator LO, of an analog signal generator feeding the panadapter 
directly at about S9+80dB. The picture is clean as a whistle. The same 
signal going through the K3 shows some spreading of the signal within a 
few kHz due to the effect of the synthesizer. The noise floor 
degradation is a modest 10dB at 2 kHz, and none at 5kHz.. The same 
setup, fed by a signal from my TS-480S is unbelievable. The noise floor 
jumps about 25 dB, and extends tens of kHz either side of the signal. A 
signal 2kHz from the TS-480S would have to be S9+10dB to be heard!


On the interface, I love having the option of controlling the K3 by hand 
or through one of the connected programs. to me, it's the best of both 
worlds.


Good point about virtual studio. I retired just before they came into vogue.

73,
Larry N8LP



Toby Deinhardt wrote:

Hi Larry,

I have lots of experience with video editing suites, both 
traditional, and
high end workstation based systems. They each have their advantages, 
and I

haven't noticed any speed advantage for either when it comes to
post-production. When it comes to live production, however, buttons and
knobs win hands down IMO. 


The point is not so much *if* buttons, sliders, knobs and the like are 
better, but how the operating controls are arranged. For example, I 
would hate to think of doing a live edit of a sports event if 
everything is mounted a vertical plane.


Otoh, I was involved in a live sports magazine show, which was 
produced in a virtual studio - this would not have been possible 
without a context sensitive GUI on a computer screen.


For a contest situation I would like a little of both, especially if 
my hands do not have to wander around to operate various parts of 
the station and at the same time do the logging.


vy 73 de toby

PPS: Amazing how my innocent question whether the ADT-200A had been 
tested somewhere, has resulted in a wonderful thread dealing with many 
aspects of modern radio design...



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Re: [Elecraft] Bigger K3 S-meter

[Larry Phipps]

Once calibrated to an accurate reference, LP-PAN provides an extremely 
accurate S-Meter in dBm, in addition to the display.  +/- 2dB absolute 
accuracy can be obtained by using an Elecraft XG-2 mini  module as the 
reference for calibration. The linearity is better than 1 dB over a 
115dB range. This is independent of any K3 AGC settings.


Larry N8LP


 From: ab2tc [EMAIL PROTECTED]
 Subject: Re: [Elecraft] Bigger K3 S-meter
 To: elecraft@mailman.qth.net
 Date: Friday, October 31, 2008, 8:01 AM
 Hi,
 
 Adding a new command for a dBm report would not break any

 existing software.
 A resolution of 1 S unit or 5dB is really unsatisfactory.
 
 

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[Elecraft] Re: KAT100 affecting power output

[Larry Phipps]

Hi Bill. I don't have the KAT100, but those values look typical for 
antenna tuners that are internal to a rig. Because of size constraints, 
they tend to be a bit lossier than external tuners, although all tuners 
have some loss, which varies with band. I prefer external tuners for the 
simple reasons that they can be heftier (handle 1500W), can be used with 
all the rigs in the shack, can be used with or without the amplifier on 
and can be placed after the wattmeter, which is the best place for them. 
Internal tuners are great for portable operation, although I didn't get 
one this time because I use a K2 for remote ops. 73, Larry N8LP Date: 
Thu, 23 Oct 2008 17:44:00 -0700 (PDT) From: NZ0T [EMAIL PROTECTED] Subject: 
Re: [Elecraft] KAT100 affecting power output To: 
elecraft@mailman.qth.net Message-ID: 
[EMAIL PROTECTED] Content-Type: text/plain; 
charset=us-ascii Was it something I said? Dumb question or is the 
problem something obvious I should know? Any help appreciated! NZ0T wrote:


 
 It seems my KAT100 is reducing power output on 10, 12 and 15 meters when

 in line:
 
w/tunerw/o tuner

 10 75w   85
 12 80 95
 15 85 90
 
 I have tested the short coax jumper between the rig and tuner and it is

 fine.  Do I neede to redo the power calibration of R3/R4?  Could this be
 off and shutting down the power?  Why just on the upper bands?
 
 As always thanks to all for any help!
 
 73 Bill NZ0T

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Re: [Elecraft] K3 HRD lastest beta not working with LP-Bride

[Larry Phipps]

OK Simon. I added support for AG$, IS, MD$, OM, RG$, RVA, RVF and RVR to 
LP-Bridge. That seems to allow HRD to work properly, at least for the 
commands that you appear to have added to the main polling routine. I 
will look through the dev reflector for further new commands that need 
to be added. I pass all your new SET commands through, so I only need to 
be concerned about new GET commands at the moment.


After a little testing, I will release this version, but I will leave 
the current version on my website as well for those who are not running 
the K3 beta firmware.


73,
Larry N8LP

- Original Message - 
From: Simon (HB9DRV) [EMAIL PROTECTED]

To: Larry Phipps [EMAIL PROTECTED]; elecraft@mailman.qth.net
Sent: Monday, October 06, 2008 12:41 AM
Subject: Re: [Elecraft] K3 HRD lastest beta not working with LP-Bride


  

 Hi Larry,

 Here's 1989 - 
 http://mannindustries.net/hrd/public/betas/041/HRDv041b1989_Full.exe


 This implements everything available in Wayne's CAT support, as the radio 
 stays in K31 all the time I hope your bridge is no longer broken - let's 
 see.


 Simon Brown, HB9DRV
 www.ham-radio-deluxe.com

 - Original Message - 
 From: Simon (HB9DRV) [EMAIL PROTECTED]



 New kit in about 30 minutes, I'll be in K31 mode all the time (as 
 pre-1988) with the exception of the FW command where I'll send 
 K30,FW;K31;.


  

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Re: [Elecraft] K3 HRD lastest beta not working with LP-Bride

[Larry Phipps]

Hi Simon. I have not implemented the $ commands yet, or some of the 
other new commands discussed on the developer's reflector. I plan to do 
that when I get caught up on orders. Because the K3 might be talking to 
up to five different applications, I generally don't allow meta commands 
to be passed to the K3. I keep it in one mode for K2* and K3* commands. 
I can add this as an option for one main program, but that could cause 
problems with other programs. I could also add a slew of commands to 
fill in the virtual K3 that I create so that it can answer either K30 
or K31 commands, but that's a lot of work that will have to wait. I have 
about 45 GET commands implemented, but I think there have been at 
least a dozen added in the last few weeks by Wayne. Most SET commands 
are passed on, except for some of the dev commands and meta commands.


In the meantime, I will download and test your latest beta to see what's 
going on. It seems that it should still work at the level it used to, 
even without the added command support.


Larry N8LP




Message: 22
Date: Sun, 5 Oct 2008 17:39:41 +0200
From: Simon (HB9DRV) [EMAIL PROTECTED]
Subject: Re: [Elecraft] K3 HRD lastest beta not working with LP-Bride
To: [EMAIL PROTECTED],  'Doug Alspaugh'
[EMAIL PROTECTED], elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original

Also I am switching the K30 / K31 quite a bit so that I can use the various 
filtering options. Maybe Larry's not expecting this.


Simon Brown, HB9DRV
www.ham-radio-deluxe.com



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Re: [Elecraft] K3/KRX3 80M SPLIT

[Larry Phipps]

For those of you who are having the problem Jim reports. I found a 
formatting error in LP-Bridge in split mode which was dropping a zero 
in the reported frequency to SteppIR in this mode. It is fixed in 
version 0.9.8.2, which can be downloaded on the LP-Bridge page at 
http://www.telepostinc.com/LPB.html


73,
Larry N8LP


Message: 23
Date: Fri, 26 Sep 2008 02:24:38 -
From: James Denneny [EMAIL PROTECTED]
Subject: [Elecraft] K3/KRX3 80M SPLIT
To: elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain;   charset=us-ascii

There may be a bug here.  The key seems to be simplex or split.  If I put
both vfos on the same 80M freq and leave K3 in simplex, SteppIR tuning is
perfect.  If I select SPLIT and key K3, the SteppIR controller heads to
35Mhz even though both vfo's are on same freq.

 


Fortunately, I have a band-aid.  I use LP-Bridge output to communicate with
controller.  I simply turn LP-Bridge output off when operating split on 80
and then I don't care what the K3 is trying to tell the controller.

 


I am running latest K3 firmware.  I have not investigated this phenomenon on
other bands as I only use the BiggIR on 80M

 


Jim Denneny

K7EG  

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[Elecraft] Re: [LP-PAN] LP-Bridge - Way Cool!!!

[Larry Phipps]

Hi Greg. I replied to your Elecraft post about AT-Auto and suggested you 
try LP-Bridge. I used Nabble for the first time, so I don't know if the 
post got to you, or you just figured it out. AT-Auto and SteppIR are two 
of the reasons I added the Output ports to LP-Bridge.


73,
Larry N8LP



Greg wrote:


This is working great.  I received my new AT-Auto tuner and configured 
it for Kenwood settings.  Connected the supplied cable to a COM port 
on a PCIe card and set LP-Bridge to COM6.  The tuner is reading the 
frequency just fine and it works great.
 
Outstanding!
 
73

Greg
AB7R
 
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[Elecraft] Re: Elecraft Digest, Vol 53, Issue 9

[Larry Phipps]

Thanks for your typically thorough testing and analysis, Jack. I would 
add one comment to your tests as it relates to my testing during the 
design of LP-PAN. You assume a 10K load Z for a typical sound card. I 
have now characterized half a dozen professional sound cards suitable 
for use with broadband softrock type receivers. In my testing I have 
found substantial variation of input Z vs. frequency, ranging from under 
500 ohms to almost 100K ohms depending on card and frequency. It should 
be noted that my test equipment leaves something to be desired when 
measuring Z at very low audio frequencies. I don't know that such loads 
would affect the distortion of the circuit being tested, but I suspect 
it could at certain frequencies.


I add a resistive load across the xfmr secondary to moderate the effects 
of the varying loads, and set a lower limit for cards with extremely 
high input Z. The optimum value changes from card to card, but I found 
approx. 2K ohms to be a reasonable choice with LP-PAN (using SP70 
xfmrs)  where flat response out to 100 kHz is a primary design goal. 
This, of course, would not be the case for a K3 audio output where 5 kHz 
would be adequate response. The added load could probably be lower in 
that case, but that may be counter productive if the sound card has a 
low Z in the 400-800 Hz range used for CW. These things are never 
simple, are they?


Larry N8LP




Date: Fri, 05 Sep 2008 21:22:33 -0400
From: Jack Smith [EMAIL PROTECTED]
Subject: [Elecraft] Harmonic Distortion and Audio Intermodulation in
K3'sLIN OUT Port
To: elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I've completed a series of detailed measurements trying to understand 
why my K3's LIN OUT port exhibits greater distortion and anomalies than 
found in the headphone and speaker ports.


Details are at 
http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm


What I found is that the 604 ohm resistor between U29's output amplifier 
stage and the TTC-108 transformer primary winding forces the TTC-108 
isolation transformer to operate in a regime where the performance 
improving effects of a zero ohm driving source are not available. Hence, 
the TTC-108's 0.5% THD performance significantly limits the LIN OUT 
ports performance.


I've also provided a  theoretical parts value change that should improve 
the LIN OUT distortion and intermodulation. I have not implemented this 
change in my K3, but the external circuit mockup I used for testing 
strongly supports the change.


I've supplied my measurements to the gurus at Elecraft for their 
consideration. If my data and  recommendations make sense, I would 
expect confirmation from Aptos, after they have time to think it over 
and consider possible side effects.


Jack K8ZOA
www.cliftonlaboratories.com
  

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[Elecraft] K3 Harmonic Distortion

[Larry Phipps]

This discussion reminds me of some of the design choices I had to make when designing 
LP-PAN last year. I wound up using the SP-70 MILSPEC xfmrs, each driven by a pair of 
op-amps in a push pull configuration with zero ohm source. My original goal 
was to reduce 2nd harmonic distortion and improve response at frequencies approaching 0 
Hz without the need for large capacitors in the output. The xfmrs are quite expensive, 
even in large quantities, but I have been very happy with the results.

Larry N8LP




Date: Thu, 04 Sep 2008 14:33:19 -0400
From: Jack Smith [EMAIL PROTECTED]
Subject: Re: [Elecraft] K3 Harmonic Distortion
To: David Cutter [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net, Leigh L. Klotz, Jr WA5ZNU
[EMAIL PROTECTED],  Julian, G4ILO [EMAIL PROTECTED]
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

David:

Even a rather poor transformer improves significantly when driven by a 
zero ohm source such as an op amp. The typical modem line transformers 
that are spec'd at 0.5% THD, for example, come in one to two orders of 
magnitude better when driven by a low impedance source. In fact, it's at 
the point where my lowest distortion audio generator (HP 200CD) isn't  
good enough to measure a $4 transformer when driven by an op amp. I'm 
generator limited at -63 dB at the moment.  I hope to improve that 
measurement floor in the next week or so.


Driving the same transformer with a 600 ohm source Z brings you back to 
the 0.5% THD range.


It's all quite interesting and reminds me again that it's not what you 
don't know that's the problem; rather it's what you think you know that 
bites you in the backside.


Jack


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[Elecraft] Re: K3 LOGGING SOFTWARE

[Larry Phipps]

This is exactly what LP-Bridge is designed to do... allow integration of 
K3, LP-PAN and a number of other simultaneous applications like loggers, 
CW Skimmer, etc., as well as hardware that needs frequency data like 
SteppIR and AT Auto. LP-Bridge will expand to include other capabilities 
as well.


73,
Larry N8LP





Date: Fri, 29 Aug 2008 01:45:47 -0400
From: alex [EMAIL PROTECTED]
Subject: [Elecraft] K3LOGGING  SOFTWARE
To: k3 ref elecraft@mailman.qth.net, [EMAIL PROTECTED]
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Many of use our  rigs  with  contest software.   Here are  some  
operating  experiences  which  may be
helpful:   Please   report  your  own  expereinces  with  other  
software,  so that  we will not have  to reinvent   the wheels!!!


Using  K3   with  K1EA   CT-DOS v 10.03:  the following  worked FB
 Plain   vanilla   pc  machine  running  either  WIN98se  or  6.22  DOS.  
K1EA  CT-DOS  V  10.03,  set COMTSR2  -b4800  active,  choose TS940 as 
transceiver and

in ct setup,  comport2 = radio1, 4800baud.
Bandmap, band changes-from the K3  from CT  all  worked.  Did  not 
check split freq  operations.

lpt2  as keying  interface  with  CT  paralell  port  circuit   worked fb
NOTE:  I had no tnc and cannot vouch  for  point es shoot,  
announcements etc


Using  CTWin  Windows op  version  of  K1EA  CTWIN:
PC:  Dell laptop 840c, xp pro,  with Prolific  USB-Comport  device as 
comport3.  Baud rate  4800

Transceiver  TS940,  setup:  comport3 = radio1, 4800 baud rate
LPT2  as keying input
RESULTS:   CTWIN  worked fb EXCEPT  entering  freq  on ctwin  did  not  
change the  K3
frequency  but changing  the freq  on the K3  registered fb  on ctwin.  
Again no experience with a tnc,  spot annoucements  etc.  I do not know 
how to set  up CTWIN  for TELENET  operations.


Using  ctWIN   IN WINDOWS XPPRO,  K1EA  CTWIN
PC: Dell840c laptop, Prolific USB-Comport  device  AND  LP-Bridge  
software from  Telepostinc.com  setting LP-Bridge  Virtual  Comport 1 
with  1A  option  checked   K3  baudrate  set  at 38400  baud.

LPT2  as keying  input  toctwin.
RESULTS:  CTWin  worked  fb,  could set K3  freq  from ctwin, all else 
as above.


This technique of using a Virtual COMPORT  via LP-BRidge  might be one 
method of  using both the LP-PAN  panadapter  AND  a logging/contest  
program simultaneously.  NOTE  there are 3 possible  VIRTUAL  COMPORTS  
available on  LP-Bridge software.


Others might relate their  expereinces  with other  loggin/contest 
software  as well



alex w2ox

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Re: [Elecraft] K3 Buffer Mod

[Larry Phipps]

I have addressed this on my reflector, but for the benefit of those on 
the Elecraft reflector...


95% of LP-PAN users will be happy with the NF and sensitivity without 
any modifications to the K3. On most bands, the resulting NF caused by 
the loss in the K3 buffer will be masked by atmospheric noise. On the 
higher bands, keeping the K3 preamp on will help a lot. This is usually 
OK at most locations because the K3 preamp is quite strong.


The reason I came up with the mod is because a couple users were trying 
to use CW Skimmer for weak signal detection with LP-PAN feeding it. The 
mod improves the NF of the IF output by up to 10dB (K3 preamp off, 
somewhat less with the K3 preamp ON). Even though the NF of LP-PAN 
itself is quite good, it can't do anything to improve the system NF 
since it's downstream of the loss.


My advice is to try it without modifying the K3 first. You will most 
likely be quite happy with the result. Be sure to read all the 
instructions before attempting the mod. It is comparable in complexity 
to the HAGC mod that Elecraft offers... but still requires reworking SMT 
parts.


73,
Larry N8LP



Jack Smith wrote:
Larry's LP-PAN uses my Z1 amplifier design in its front end, with 
a couple of modifications to provide variable gain.


The AD8007 amplifier chip in both my Z1 and the LP-PAN is a decent 
amplifier with a respectable noise figure.


If the K3's IF sample circuit had been built with closer to 0 dB 
transfer gain, then the composite noise figure would be closer to the 
K3's noise figure.


To answer the two questions directly (I don't have an LP-PAN, so Larry 
might wish to modify my answers):


1. Is the mod necessary with the LP-PAN, or is it only needed with other
panadapters? That is, is the noise figure of the LP-PAN's internal 
amplifier
sufficient, or is the mod to the K3 required to lift weak signals 
above the

noise floor of the LP-PAN?

I believe you will see a small improvement in composite K3-LP-PAN 
noise figure if the changes are made to the K3's IF sample circuitry. 
However, I doubt that under most band conditions you will observe a 
difference as there is sufficient external noise to mask the improvement.


2. Would the external buffer amplifier solution be a viable 
alternative to

the mod?

Yes, I believe it is if you are using something other than the LP-PAN 
as the panadapter. Panadapters are not normally designed to be as 
sensitive as a receiver. There are many reasons for that that I won't 
bother to go over now. The consequence is that designers of receivers 
that provide a pan scope RF sample have the levels set so that there 
is at least a net 0 gain, and positive gains of 10 dB or more are not 
uncommon. I'm speaking mostly of commercial and military grade 
equipment, but my Kenwood TS-940 has reasonable transfer gain as well.



Jack K8ZOA
www.cliftonlaboratories.com


Richard Ferch wrote:
I am scratching my head wondering whether any of this applies to the 
LP-PAN,
or whether it is only relevant to other panadaptors such as the 
Softrock and

the Z90.

K8ZOA's web page (the same one everyone is quoting) says:

I looked at two potential panadapters; a Softrock and my Z90.
(Telepostinc's LP-PAN has a built-in amplifier to overcome the 
transfer gain

problem.)

and in the recommendations near the bottom of the page, refering to 
the mod,



These steps are not necessary with an LP-PAN panadapter as it has a
built-in isolation amplifier.

That same web page also suggests that an alternative to the mod would 
be to

use an external buffer amplifier.

So, I have two questions:

1. Is the mod necessary with the LP-PAN, or is it only needed with other
panadapters? That is, is the noise figure of the LP-PAN's internal 
amplifier
sufficient, or is the mod to the K3 required to lift weak signals 
above the

noise floor of the LP-PAN?

2. Would the external buffer amplifier solution be a viable 
alternative to

the mod?

73,
Rich VE3KI

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Re: [Elecraft] K3 Buffer Mod

[Larry Phipps]

I added a section to the instructions for the mod this morning that echo Jack's 
suggestion to check the dissipation of Q10. Because of the great variability of 
specs with the J310, it is a good idea to check it.

Jack's example is not representative of any actual measurements, but rather 
just an example of how to calculate the dissipation.  In my case, I found a 
calculated dissipation of about 125mW... a quite safe value. My original SPICE 
simulation predicted 180mW. The device is rated at 350mW, and my goal was to 
keep dissipation to half that value.

Larry N8LP



Message: 24
Date: Fri, 22 Aug 2008 09:13:40 -0700 (PDT)
From: Bill W4ZV [EMAIL PROTECTED]
Subject: Re: [Elecraft] K3 Buffer Mod
To: elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=us-ascii




Lyle Johnson wrote:

 
  

 Elecraft is well aware of N8LP's mod, Wayne saw no problems with it at
 first
 glance and is now considering whether to make it a production mod.  Both
 N8LP and K8ZOA seem to feel it is not damaging the radio, etc.

 
 Remember to make the measurements Jack points out on his web page if you 
 do the mod.  This is to be sure the buffer transistor does not exceed 
 its thermal ratings.
 
  


Yes, here are the details:

http://cliftonlaboratories.com/elecraft_k3_and_panadapters.htm#Alternative_to_increasing_K3_IF_sample_port_output

**
If you make this modification, I suggest measuring the voltage across the
new R9. Q10's drain current is set by a combination of the voltage drop
across R9 and the individual characteristics of the J310 part in your K3.
FETs have a notoriously wide part-to-part spread in parameters and it's
possible that the J310 device in your K3 has parameters sufficiently far
from the mean that Q10's power dissipation limits will be reached or
exceeded. The surface mount J310 has a maximum power dissipation rating of
350 mw, and for reliability a safe operating value is 200 mw or so. Q10's
current can be easily determined by measuring the voltage drop across R9. If
changed to 49.9 ohms, Q10's drain current Id is 1000*Vs/50 (in milliamperes)
where Vs is  the voltage measured from ground to Q10's source pin. To
calculate the power dissipated in Q10, measure its drain voltage. The power
is then (Vd-Vs)*Id in milliwatts, where Id is in milliamperes.

An example. After replacing R9 with a 49.9 ohm resistor, the following
voltage readings are found: Vs = 2 volts, Vd = 12 volts. The idle current
through Q10 is thus 2 / 49.9 = 40 mA. The power dissipated in Q10 is (12-2)
* 40 = 400 milliwatts. This exceeds the J310's maximum permissible power
dissipation and would not be a good design practice.
**

In my unit the voltage across R9 was 460 mV, which resulted in 0.46/51 = 9
mA and power of 90 mW, well below the maximum rating of 350 mW and below
Jack's recommendation of 200 mW.

73,  Bill


  

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