Re: [Elecraft] KPA-500 "Output for Input" schedule?

[Cortland Richmond]

The INTERESTING thing about the article is that it is ANALOG predistortion.
Even a few dB would be an improvement, if 10 to 20 dB proves beyond reach
for such a broad (16:1) spectrum as HF.

 

Cortland

KA5S



Date: Thu, 12 May 2011 13:43:51 -0400
From: Jack Smith 
Subject: Re: [Elecraft] KPA-500 "Output for Input" schedule?
To: elecraft@mailman.qth.net
Message-ID: <4dcc1c56.5050...@cliftonlaboratories.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Geoff & list readers ...

There's an article in the current Electronics Design News, as a matter
of fact, on pre-distortion.

http://www.edn.com/article/518070-RF_predistortion_straightens_out_your_sign
als.php

Although aimed at cellular radio digital modulation, the concepts apply
to analog SSB as well.

Jack


On 5/12/2011 12:44 PM, Geoffrey Mackenzie-Kennedy wrote:
> Hello Guy,
>
> The short answer to the first part of your question is yes, and the
generic
> term for such a scheme is Predistortion. A term that has been used to
> identify a Predistortion scheme which employ digital techniques is a
> "Digital Predistortion Linearizer" (DPL), and its use can bring about a
> significant reduction in the level of IMD being transmitted compared to a
> classic class AB design. Unfortunately the relevant data that I have is
> packed ready to leave for Luxembourg.
>
> I don't know how easy or difficult DPL would be to implement in the K3, or
> in any other "already designed" rig which employs DSP, but I suspect that
> somebody else reading this could tell you.
>
> 73,
> Geoff
> GM4ESD
>
>



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Re: [Elecraft] [KX1] Key input doesnt like capacitance

[AB8XA]

Here's another happy camper with the KX1, a Hustler 6BTV over 40 radials at 
home and a 26 foot random wire in the field.

I'm considering a 26 foot wire on a 28 foot Jackite fiberglass pole for 20, 30, 
and 40 meters with a clip-on 40 foot wire at the top, run via dacron line to a 
tree for an inverted-L on 80 meters. We'll see.

--
Moe - AB8XA
Elecraft KX1 #2484, Fists #13020, SKCC #7460, 
FPQRP #2617,  NAQCC #5352, QRP-ARCI #14326


On May 13, 2011, at 3:01 PM, Chip Stratton wrote:

> I've had seemingly good results with my KX1 on 20, 30, and 40 just using the
> 25 ft wire thrown into a tree and a 16 ft counterpoise along the ground. The
> KXAT1 found useable matches every time. It seems like I remember doing OK on
> 80 meters too, but that may have been into my 6BTV vertical at home.
> ...

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Re: [Elecraft] KPA500 Assy Manual

[Eric Swartz - WA6HHQ, Elecraft]

Not yet - its still in the review/changes cycle.

73, Eric


On 5/13/2011 1:47 PM, n...@n5ge.com wrote:
> Thought I'd ask if there is an preview of the Assy manual?
>
> 73,
> Tom
> Amateur Radio Operator N5GE
>
>
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Re: [Elecraft] KPA500 Utility

[Eric Swartz - WA6HHQ, Elecraft]

typo. I'll change it to KPA500.
73, Eric


On 5/13/2011 1:12 PM, Richard Squire - HB9ANM wrote:
> The FW page for KPA Utility (Windows Version 1.4.5.4)  May 4, 2011 reads:
>
>  "Download and run the file from the above link.
>  Use this utility to check for the latest releases of new features for
> your K3.
>  Requires either a RS-232 cable or KUSB Serial-USB Cable to download from
> your PC to the K3."
>
> To the K3??? Or to the KPA500?
> Is this a typo?
>
> It's a bit early (still waiting for my KPA500 and it will have the initial
> FW anyway) but I'm curious!
>
> 73
> Richard
>
> -
> Richard - HB9ANM
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/KPA500-Utility-tp6361039p6361039.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> __
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Re: [Elecraft] Monitor output...

[Eric Swartz - WA6HHQ, Elecraft]

Yes.

73, Eric


On 5/13/2011 1:04 PM, R. Kevin Stover wrote:
> Agreed.
>
> I'm a little curious if the P3 will have enough horsepower to
> drive my 22" LCD to slightly respectable resolution. If not, why bother?
>
>
> On Fri, 13 May 2011 11:45:36 -0700
> David Gilbert  wrote:
>
>> I don't think I can agree with that part of your post ... this looks
>> like a pretty nice display to me.
>>
>> http://www.telepostinc.com/TRX-rev13.png
>>
>> Dave   Ab7E
>
>
>
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

[Rex Lint]

Poul,

This is allowed, according to the guidelines at
http://www.elecraft.com/elecraft_list_guidelines.htm:


"7. Commercial postings are allowed if they relate to Elecraft products,
QRP, QRO, home-brewing, building etc. and are of interest to this list's
membership. Please keep them as short as possible and provide web links to
more detailed information. I'll step in if we feel someone is posting too
many messages of this type.

7a. Please limit commercial postings to one per month per offering or
product area (i.e. Builder for Hire postings, ham radio related products
etc.)"



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Poul Erik Karlshøj
(PKA)
Sent: Friday, May 13, 2011 5:38 AM
To: Alan Price; Elecraft
Subject: Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

SPAM mail?

-Oprindelig meddelelse-
Fra: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] På vegne af Alan Price
Sendt: 13. maj 2011 03:55
Til: Elecraft
Emne: [Elecraft] Let me build you a new K2 or other Elecraft kit


I have built more than 265 K2's to date.  The K2 is still a great little
radio.  Let me build one for you.  You receive a new radio with the options
you want.  My prices are reasonable.  Please respond off of the reflector.
 
73
Alan
W1HYV 
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Re: [Elecraft] QRP POWER

[Vic K2VCO]

You can come to Fresno and join us, Wayne. We came in 3rd nationally in the 1A 
battery 
class in FD last year with my K2.

And... this was after we were snowed out of our killer Sierra location and had 
to operate 
from one of our backyards!

On 5/13/2011 11:20 AM, Wayne Burdick wrote:
> Nice work, RC. I'm envious...I need to get out of the lab and do some
> more operating :)
>
> 73,
> Wayne
> N6KR
>
> Robert 'RC' Conley wrote:
>
>> Forgive me for tooting my on horn, but Wayne said I should..
>> According to QST JUNE 2011 issue
>> K3 #3212/10 and I are Delta Division (QRP category) Plaque Winners
>> of the ARRL Nov 2011 Sweepstakes
>> K3 MoJo you bet! Amen!
>>
>> --
>> RC KC5WA

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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[Elecraft] Warning during "Transmitter Gain Calibration".

[David Quental]

Hello all,

today I got the XXV3A interface and installed it inside K3, all went 
well and I performed tests according manual. It performed all power 
tests and get this warning:

StopTune: Unexpected response 'TQ1;' to ''. State 77. Retrying

However calibration went succeefull in 50, 5 watts and 1 Milliwat power.

Now version inside K3 is 04.36 and 01.14, DSP is 02.73.

Best 73 to all.

CT1DRB
David Quental

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[Elecraft] KPA500 Assy Manual

[n5ge]

Thought I'd ask if there is an preview of the Assy manual?

73,
Tom
Amateur Radio Operator N5GE

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[Elecraft] KPA500 Utility

[Richard Squire - HB9ANM]

The FW page for KPA Utility (Windows Version 1.4.5.4)  May 4, 2011 reads:

"Download and run the file from the above link.
Use this utility to check for the latest releases of new features for
your K3.
Requires either a RS-232 cable or KUSB Serial-USB Cable to download from
your PC to the K3."

To the K3??? Or to the KPA500?
Is this a typo?

It's a bit early (still waiting for my KPA500 and it will have the initial
FW anyway) but I'm curious!

73
Richard

-
Richard - HB9ANM
--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KPA500-Utility-tp6361039p6361039.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Monitor output...

[R. Kevin Stover]

Agreed.

I'm a little curious if the P3 will have enough horsepower to
drive my 22" LCD to slightly respectable resolution. If not, why bother?


On Fri, 13 May 2011 11:45:36 -0700
David Gilbert  wrote:

> 
> I don't think I can agree with that part of your post ... this looks 
> like a pretty nice display to me.
> 
> http://www.telepostinc.com/TRX-rev13.png
> 
> Dave   Ab7E




-- 
R. Kevin Stover
AC0H
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Re: [Elecraft] K3: 106W on 6m

[Stephen Prior]

Jim,

It's what the display of the K3 is telling me - Wayne has already
replied - it's a (temporary) mathematical curiosity with the firmware.

As a physics professor I'm acutely aware of the measurement problems
you describe!

73, Stephen G4SJP

On 13 May 2011 20:54, Jim Brown  wrote:
> On 5/13/2011 12:21 PM, Stephen Prior wrote:
>> I have only just noticed that on 6m only, the maximum power output
>> that can be dialled up is 106W.  110W on all other bands.
>
> I would be VERY VERY interested in how you can reliably resolve the
> difference between 110 watts and 106 watts, or even how you're certain
> it's 106 watts.  The accuracy of a Bird 43 wattmeter is 5% of full
> scale. To measure 106 watts you need a 250W slug. 5% of that is 12.5
> watts.  Where did you get that slug? Do you have any assurance that it
> was calibrated?
>
> Perhaps another wattmeter?  Has it been calibrated against a known
> standard?  Do you know the frequency response of that meter?  That is,
> if it's calibrated at 14 MHz, is it also correct at 28 MHz?  At 50 MHz?
> How do you know?  That is, what voltage or current reference are you
> using to determine it?  When and where was that voltage or current
> reference last calibrated?
>
> 73, Jim Brown K9YC
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Re: [Elecraft] Monitor output...

[Al Lorona]

It looks like that sound card has a problem with harmonics of some sort of 
spurious or noise signal. Unless I'm reading the screen wrong... which is my 
2nd 
complaint about it.

Al W6LX


I don't think I can agree with that part of your post ... this looks 
like a pretty nice display to me.

http://www.telepostinc.com/TRX-rev13.png

Dave  Ab7E
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Re: [Elecraft] K3: 106W on 6m

[Jim Brown]

On 5/13/2011 12:21 PM, Stephen Prior wrote:
> I have only just noticed that on 6m only, the maximum power output
> that can be dialled up is 106W.  110W on all other bands.

I would be VERY VERY interested in how you can reliably resolve the 
difference between 110 watts and 106 watts, or even how you're certain 
it's 106 watts.  The accuracy of a Bird 43 wattmeter is 5% of full 
scale. To measure 106 watts you need a 250W slug. 5% of that is 12.5 
watts.  Where did you get that slug? Do you have any assurance that it 
was calibrated?

Perhaps another wattmeter?  Has it been calibrated against a known 
standard?  Do you know the frequency response of that meter?  That is, 
if it's calibrated at 14 MHz, is it also correct at 28 MHz?  At 50 MHz?  
How do you know?  That is, what voltage or current reference are you 
using to determine it?  When and where was that voltage or current 
reference last calibrated?

73, Jim Brown K9YC
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Re: [Elecraft] Monitor output...

[GDanner]

Dave,
I have both and have migrated to using the P3's display 100% of the time.
LP-Pan on the computer might be much more useful for me if I had a second 
monitor.
I will probably try the P3 external monitor when it becomes available. At 
that time I can decide on the LP-Pan or larger P3 display.
IMHO - if cost is the major issue then I would recommend LP-Pan. If seamless 
integration where you don't want to futz with the computer, sound card & 
software issues then the P3 should be your choice; especially if the VGA 
option looks good in a larger format.
Disclaimer - I have not moved to TRX-Pan on my LP-Pan so my comments are for 
the LP-Pan using PowerSDR/IF.
George
AI4VZ

-Original Message- 
From: David Gilbert
Sent: Friday, May 13, 2011 2:45 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Monitor output...


I don't think I can agree with that part of your post ... this looks
like a pretty nice display to me.

http://www.telepostinc.com/TRX-rev13.png

Dave   Ab7E



On 5/13/2011 10:49 AM, John Ragle wrote:
>
> As a panadapter, the P3 is much nicer to work with than e.g. HDSDR/PMSDR
> or LP-Pan, which take up most of a screen with doo-dads.
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Re: [Elecraft] Can P3 output to a monitor?

[w5ov]

This email was an LDE from last Saturday that somehow was transmitted today.


> On Sat, May 7, 2011 at 12:17 PM, W2BLC  wrote:
>> I haven't bought the K3 and P3 combo - still kicking the tires. That,
>> and getting a few more questions answered.
>>
>> It is possible to output the P3 to a large monitor? Anyone doing it that
>> can comment?
>
> If you search the list, its has been asked several times.
>
> Answer:  Not right now,  but Elecraft is actively developing this
> enhancement.
>
> 73
>
> -aps
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Re: [Elecraft] K3: 106W on 6m

[Wayne Burdick]

Feature :)

This a mathematical curiosity related to the way I handle 6-meter  
power control in firmware. It's on the list somewhere.

Wayne
N6KR


On May 13, 2011, at 12:21 PM, Stephen Prior wrote:

> I have only just noticed that on 6m only, the maximum power output
> that can be dialled up is 106W.  110W on all other bands.
>
> Bug or feature I wonder?  Just curious.
>
> Using K3/P3 with latest firmware (4.36)
>
> 73 Stephen G4SJP
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[Elecraft] K3: 106W on 6m

[Stephen Prior]

I have only just noticed that on 6m only, the maximum power output
that can be dialled up is 106W.  110W on all other bands.

Bug or feature I wonder?  Just curious.

Using K3/P3 with latest firmware (4.36)

73 Stephen G4SJP
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Re: [Elecraft] Can P3 output to a monitor?

[Eric Swartz - WA6HHQ, Elecraft]

We are -very-  actively working on it at this time. Look for it later 
this summer if everything goes to plan.

73, Eric

On 5/13/2011 10:50 AM, Alexander Sack wrote:
> On Sat, May 7, 2011 at 12:17 PM, W2BLC  wrote:
>> I haven't bought the K3 and P3 combo - still kicking the tires. That,
>> and getting a few more questions answered.
>>
>> It is possible to output the P3 to a large monitor? Anyone doing it that
>> can comment?
> If you search the list, its has been asked several times.
>
> Answer:  Not right now,  but Elecraft is actively developing this enhancement.
>
> 73
>
> -aps
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Re: [Elecraft] We need to develop the Ideal Antenna!

[Chip Stratton]

I've had seemingly good results with my KX1 on 20, 30, and 40 just using the
25 ft wire thrown into a tree and a 16 ft counterpoise along the ground. The
KXAT1 found useable matches every time. It seems like I remember doing OK on
80 meters too, but that may have been into my 6BTV vertical at home.

If I'm out during the day and happy with 20 meters only, I use an End-Fedz
20 meter half wave antenna and no counterpoise, and  it works well for me
with the KXAT1 turned off.

Good luck!

Chip

On Fri, May 13, 2011 at 1:17 PM, Don Wilhelm  wrote:

>  Bob,
>
> Actually, a properly functioning KX1 has an MDS of better than -130 dBm,
> so it actually is a sensitive receiver.
>
> Some like the Carolina Windom, but I don't like any unbalanced antennas,
> and have a high preference for center fed antennas, they are easier to
> tame, and if the feedline leaves the antenna at right angles from the
> center, seldom do "RF-in-the-shack" problems emerge.
>
> The KXAT1 has a more limited range on 80 meters than the other bands
> just because the total inductance and capacitance is limited - only 3
> choices of each.
>
> I would suggest a trap antenna with traps for 40 and 20 meters.  Feed it
> with balanced feedline cut a half wavelength (or multiple) on 80 meters
> - the tuner should be able to match it on 30 meters and the half
> wavelength of feedline on 80 meters should present a feedpoint impedance
> close to that at the antenna center (50 to 75 ohms) for 80, 40, and 20
> (assuming the traps are used).
> I have not actually built such an antenna, but the theory says it should
> work just fine.  Keep the balanced feedline supported along its entire
> length and don't forget that there is a velocity factor to consider when
> determining a half wavelength - if you cannot do that, add a trap for 30
> meters and feed it with any length of coax.  Coaxial traps are not
> difficult to build, and for QRP use, can even use RG174 on a piece of
> 1/2 inch PVC for a form.  Doug DeMaw (SK) W1FB had information on
> building traps like that in QST a very long time ago (try in the
> 1980s).  Also see the W1FB Antenna Notebook and/or the article in QST
> for Decenber 1984 page 37 by N4UU.  Gary o'Neil N3GO also has some good
> information about coaxial traps on the web (use Google).
>
> I realize that a 135 foot long antenna is not "easy to deploy", so I
> would suggest an alternative - build a coax fed trap antenna for 40, 30
> and 20 meters (traps for 30 and 20), and carry along 2 33 foot lengths
> of wire - insulators on one end and an alligator clip on the other -
> when you want to operate 80 meters, add the wires to each end of the
> radiator.  You could carry that concept a bit further, and build the
> antenna for 20 meters with no traps and then add a set wires for use on
> 30 meters, another set of wires for 40, and yet another set for 80.
> clip on the wires for whichever band you want to operate.
>
> That is my nickel's worth.
>
> 73,
> Don W3FPR
>
> On 5/13/2011 1:31 PM, AB5N wrote:
> > Hi Guys-
> >
> > Well, I'm in week two of enjoyment with my new KX-1. I did have a few
> > problems in assembling, but
> > that is history.
> >
> > This little rig has a simple receiver which has only half the sensitivity
> of
> > a usual radio. As well, we are dealing
> > with 3-4 watts TX out max. We have to have an excellent antenna. I've
> tried
> > the suggested 25 ft. long wire
> > with radials. Ah, it's not good enough. I even got some strange
> RX-feedback
> > internally at some frequencies using it. I believe the criteria for an
> > excellent antenna will be as follows:
> >
> > 1. Will match up well using the internal tuner on all four bands.
> >
> > 2. Has enough metal in the air to provide adequate microvolts to the RX -
> to
> > make it function well without
> > being overloaded.
> >
> > 3. Provides some gain - or at least a clean predictable pattern
> >
> > 4. Is light, compact and easy to deploy.
> >
> > My inkling is that a normal Carolina Windom may be the thing. I'll work
> on
> > developing a micro-QRP version.
> >
> > What doesn't work?
> >
> > Classic G5RV (102 Ft) - will not load on any band with tuner.
> > Offset-Zepp fed with Coax (75'x25')
> >
> > What say guys? Anybody have superb luck with an antenna yet?
> >
> > Bob-AB5N
> >
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Re: [Elecraft] LED's in K2 keycaps

[Sverre Holm (LA3ZA)]

Both of the additional LEDs that you propose are already indicated in the LCD
display: VFO Lock with a blinking decimal point and the KNB2's with its own
arrow. Thus the need isn't there in the same way as for the five that I have
fitted: Zerobeat, Split, AFIL on, TX, RX ant on

See  http://www.qslnet.de/member/la3za/K2_LEDS.html
http://www.qslnet.de/member/la3za/K2_LEDS.html 

-
Sverre, LA3ZA

K2 #2198, K3 #3391
LA3ZA Unofficial Guide to K2 modifications 
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Re: [Elecraft] Monitor output...

[David Gilbert]

I don't think I can agree with that part of your post ... this looks 
like a pretty nice display to me.

http://www.telepostinc.com/TRX-rev13.png

Dave   Ab7E



On 5/13/2011 10:49 AM, John Ragle wrote:
>
> As a panadapter, the P3 is much nicer to work with than e.g. HDSDR/PMSDR
> or LP-Pan, which take up most of a screen with doo-dads.
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Re: [Elecraft] LED's in K2 keycaps

[Don Wilhelm]

  John,

The NB on signal can be found on the KNB2 board, but the VFO LOCK 
condition has no signal outside the microprocessor associated with it 
that I am aware of.

73,
Don W3FPR

On 5/13/2011 11:46 AM, John Cooper wrote:
> Ok Ive got LEd’s in the keycaps in the Mode/Vox switch for transmit A=B/Split 
> for rit/xit/ and split mode, and XFIL/AFIL for audio filter on.
>
> Still Planning on the rant switch light in the ANT 1/2/TUNE button when I buy 
> the 160M option and the CW zero beat light in the PRE/ATT/SPOT cap.
>
>Now I wanna do the same thing for Rate/LOCK key to light when you have the 
> VFO knob locked out and for the NB/LEVEL switch when the NB is on.  Has 
> anyone looked at adding lights for these 2 functions?
>
>
> John WT5Y
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Re: [Elecraft] QRP POWER

[Wayne Burdick]

Nice work, RC. I'm envious...I need to get out of the lab and do some  
more operating :)

73,
Wayne
N6KR

Robert 'RC' Conley wrote:

> Forgive me for tooting my on horn, but Wayne said I should..
> According to QST JUNE 2011 issue
> K3 #3212/10 and I are Delta Division (QRP category) Plaque Winners
> of the ARRL Nov 2011 Sweepstakes
> K3 MoJo you bet! Amen!
>
> -- 
> RC KC5WA



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Re: [Elecraft] We need to develop the Ideal Antenna!

[Don Wilhelm]

  Bob,

Actually, a properly functioning KX1 has an MDS of better than -130 dBm, 
so it actually is a sensitive receiver.

Some like the Carolina Windom, but I don't like any unbalanced antennas, 
and have a high preference for center fed antennas, they are easier to 
tame, and if the feedline leaves the antenna at right angles from the 
center, seldom do "RF-in-the-shack" problems emerge.

The KXAT1 has a more limited range on 80 meters than the other bands 
just because the total inductance and capacitance is limited - only 3 
choices of each.

I would suggest a trap antenna with traps for 40 and 20 meters.  Feed it 
with balanced feedline cut a half wavelength (or multiple) on 80 meters 
- the tuner should be able to match it on 30 meters and the half 
wavelength of feedline on 80 meters should present a feedpoint impedance 
close to that at the antenna center (50 to 75 ohms) for 80, 40, and 20 
(assuming the traps are used).
I have not actually built such an antenna, but the theory says it should 
work just fine.  Keep the balanced feedline supported along its entire 
length and don't forget that there is a velocity factor to consider when 
determining a half wavelength - if you cannot do that, add a trap for 30 
meters and feed it with any length of coax.  Coaxial traps are not 
difficult to build, and for QRP use, can even use RG174 on a piece of 
1/2 inch PVC for a form.  Doug DeMaw (SK) W1FB had information on 
building traps like that in QST a very long time ago (try in the 
1980s).  Also see the W1FB Antenna Notebook and/or the article in QST 
for Decenber 1984 page 37 by N4UU.  Gary o'Neil N3GO also has some good 
information about coaxial traps on the web (use Google).

I realize that a 135 foot long antenna is not "easy to deploy", so I 
would suggest an alternative - build a coax fed trap antenna for 40, 30 
and 20 meters (traps for 30 and 20), and carry along 2 33 foot lengths 
of wire - insulators on one end and an alligator clip on the other - 
when you want to operate 80 meters, add the wires to each end of the 
radiator.  You could carry that concept a bit further, and build the 
antenna for 20 meters with no traps and then add a set wires for use on 
30 meters, another set of wires for 40, and yet another set for 80.  
clip on the wires for whichever band you want to operate.

That is my nickel's worth.

73,
Don W3FPR

On 5/13/2011 1:31 PM, AB5N wrote:
> Hi Guys-
>
> Well, I'm in week two of enjoyment with my new KX-1. I did have a few
> problems in assembling, but
> that is history.
>
> This little rig has a simple receiver which has only half the sensitivity of
> a usual radio. As well, we are dealing
> with 3-4 watts TX out max. We have to have an excellent antenna. I've tried
> the suggested 25 ft. long wire
> with radials. Ah, it's not good enough. I even got some strange RX-feedback
> internally at some frequencies using it. I believe the criteria for an
> excellent antenna will be as follows:
>
> 1. Will match up well using the internal tuner on all four bands.
>
> 2. Has enough metal in the air to provide adequate microvolts to the RX - to
> make it function well without
> being overloaded.
>
> 3. Provides some gain - or at least a clean predictable pattern
>
> 4. Is light, compact and easy to deploy.
>
> My inkling is that a normal Carolina Windom may be the thing. I'll work on
> developing a micro-QRP version.
>
> What doesn't work?
>
> Classic G5RV (102 Ft) - will not load on any band with tuner.
> Offset-Zepp fed with Coax (75'x25')
>
> What say guys? Anybody have superb luck with an antenna yet?
>
> Bob-AB5N
>
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[Elecraft] K3EXREF 10 MHz Ref Input on order form

[Eric Swartz - WA6HHQ, Elecraft]

The K3EXREF 10 MHz Reference Input for the K3 is now up on the order 
form at:
http://www.elecraft.com/elecraft_prod_list.htm#exref

This also includes a link to the manual.

73, Eric  WA6HHQ

-- 

http://www.elecraft.com

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Re: [Elecraft] We need to develop the Ideal Antenna!

[k4tmc]

Bob,

How about just a basic dipole?  Or, a fan dipole that resonates on the 
appropriate bands.

73,
Henry - K4TMC



 

 


 

 

-Original Message-
From: AB5N <7000...@gmail.com>
To: elecraft@mailman.qth.net
Sent: Fri, May 13, 2011 1:31 pm
Subject: [Elecraft] We need to develop the Ideal Antenna!


Hi Guys-

Well, I'm in week two of enjoyment with my new KX-1. I did have a few
problems in assembling, but
that is history. 

This little rig has a simple receiver which has only half the sensitivity of
a usual radio. As well, we are dealing
with 3-4 watts TX out max. We have to have an excellent antenna. I've tried
the suggested 25 ft. long wire 
with radials. Ah, it's not good enough. I even got some strange RX-feedback
internally at some frequencies using it. I believe the criteria for an
excellent antenna will be as follows:

1. Will match up well using the internal tuner on all four bands.

2. Has enough metal in the air to provide adequate microvolts to the RX - to
make it function well without
being overloaded.

3. Provides some gain - or at least a clean predictable pattern

4. Is light, compact and easy to deploy.

My inkling is that a normal Carolina Windom may be the thing. I'll work on
developing a micro-QRP version.

What doesn't work? 

Classic G5RV (102 Ft) - will not load on any band with tuner.
Offset-Zepp fed with Coax (75'x25')

What say guys? Anybody have superb luck with an antenna yet?

Bob-AB5N

--
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Re: [Elecraft] Can P3 output to a monitor?

[Alexander Sack]

On Sat, May 7, 2011 at 12:17 PM, W2BLC  wrote:
> I haven't bought the K3 and P3 combo - still kicking the tires. That,
> and getting a few more questions answered.
>
> It is possible to output the P3 to a large monitor? Anyone doing it that
> can comment?

If you search the list, its has been asked several times.

Answer:  Not right now,  but Elecraft is actively developing this enhancement.

73

-aps
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Re: [Elecraft] Monitor output...

[John Ragle]

John Ragle writes:

According to the powers that be at Elecraft, they are working on the 
design of an SVGA output to augment the LCD screen. The cutout is 
already present in the rear panel of the P3.

Having used a P3 for several weeks, I can tell you that the built-in 
display is much better than one sees in the ads. In part, this is 
physiological...the eye is not fast enough to show the jaggies that show 
in a screen photo. My conclusion wrt display quality is that the LCD 
screen is quite acceptable.

As a panadapter, the P3 is much nicer to work with than e.g. HDSDR/PMSDR 
or LP-Pan, which take up most of a screen with doo-dads.

I should add that because the P3 uses a very fast ADC (60 MHz sampling 
rate!), one does not have to bother about the computer's sound card, in 
which the normal limit is 192 kHz or less (usually LESS, giving lower 
Nyquist frequencies...).

John Ragle -- W1ZI

Sorry about the empty elecraft note...the server apparently doesn't like 
HTML.

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[Elecraft] add'l comment...

[John Ragle]

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[Elecraft] Monitor output...

[John Ragle]

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Re: [Elecraft] Friday the 13th and Gremlins having fun

[Geoffrey Downs]

Or even paraskevidekatriaphobic ;-)

73

Geoff
G3UCK



- Original Message - 
From: "KD3TB" 
To: "'Elecraft reflector'" 
Sent: Friday, May 13, 2011 6:15 PM
Subject: [Elecraft] Friday the 13th and Gremlins having fun


> Being Friday 13th, I have to share this experience with everyone!
>
>
>
> I installed the newest firmware on May 12th, not Friday the 13th  and
> everything worked fine.  When I turned the radio on today (Friday 13th) my
> K3 had no RF output and showed an SWR of >25/1 on 15M.  All of the other
> bands were fine. I tested the antenna (a beam) with another radio and 15M 
> on
> the antenna was fine. Being Friday the 13th, I even check that the radio 
> was
> set to the proper antenna output on 15M...still no output.
>
>
>
> Okay, not being superstitious, I went to the K3 utility and restored my
> previous configuration. 15M now worked! I then went back and restored the
> new configuration I saved after the latest firmware update yesterday.
> Wonderful things happen, the output on 15M was now working again. I 
> checked
> the firmware installed on once again had the latest firmware installed. 
> What
> can I say!  I think the Ham Radio the gremlins that reside in everyone's
> shack had their fun and stopped playing with me
>
>
>
> I'm glad I'm not a Triskaidekaphobic!
>
>
>
>
>
> Irwin - KD3TB
>
>
>
> __
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>
> 

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[Elecraft] We need to develop the Ideal Antenna!

[AB5N]

Hi Guys-

Well, I'm in week two of enjoyment with my new KX-1. I did have a few
problems in assembling, but
that is history. 

This little rig has a simple receiver which has only half the sensitivity of
a usual radio. As well, we are dealing
with 3-4 watts TX out max. We have to have an excellent antenna. I've tried
the suggested 25 ft. long wire 
with radials. Ah, it's not good enough. I even got some strange RX-feedback
internally at some frequencies using it. I believe the criteria for an
excellent antenna will be as follows:

1. Will match up well using the internal tuner on all four bands.

2. Has enough metal in the air to provide adequate microvolts to the RX - to
make it function well without
being overloaded.

3. Provides some gain - or at least a clean predictable pattern

4. Is light, compact and easy to deploy.

My inkling is that a normal Carolina Windom may be the thing. I'll work on
developing a micro-QRP version.

What doesn't work? 

Classic G5RV (102 Ft) - will not load on any band with tuner.
Offset-Zepp fed with Coax (75'x25')

What say guys? Anybody have superb luck with an antenna yet?

Bob-AB5N

--
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[Elecraft] Can P3 output to a monitor?

[W2BLC]

I haven't bought the K3 and P3 combo - still kicking the tires. That, 
and getting a few more questions answered.

It is possible to output the P3 to a large monitor? Anyone doing it that 
can comment?

Thanks,

Bill W2BLC

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Re: [Elecraft] QRP POWER

[Dale Putnam]

Congratulations RC, and sure you should toot you r own horn... if you don't who 
will?
Mark one up for RC, and one more for K3!!

--... ...-- Dale - WC7S in Wy


 
> 
> Forgive me for tooting my on horn, but I Wayne said I should..
> According to QST JUNE 2011 issue
> K3 #3212/10 and I are Delta Division (QRP category) Plaque Winners
> of the ARRL Nov 2011 Sweepstakes
> K3 MoJo you bet! Amen!
> 
> -- 
> RC KC5WA
  
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[Elecraft] QRP POWER

[Robert 'RC' Conley]

Forgive me for tooting my on horn, but I Wayne said I should..
According to QST JUNE 2011 issue
K3 #3212/10 and I are Delta Division (QRP category) Plaque Winners
of the ARRL Nov 2011 Sweepstakes
K3 MoJo you bet! Amen!

-- 
RC KC5WA

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[Elecraft] Friday the 13th and Gremlins having fun

[KD3TB]

Being Friday 13th, I have to share this experience with everyone!

 

I installed the newest firmware on May 12th, not Friday the 13th  and
everything worked fine.  When I turned the radio on today (Friday 13th) my
K3 had no RF output and showed an SWR of >25/1 on 15M.  All of the other
bands were fine. I tested the antenna (a beam) with another radio and 15M on
the antenna was fine. Being Friday the 13th, I even check that the radio was
set to the proper antenna output on 15M...still no output.

 

Okay, not being superstitious, I went to the K3 utility and restored my
previous configuration. 15M now worked! I then went back and restored the
new configuration I saved after the latest firmware update yesterday.
Wonderful things happen, the output on 15M was now working again. I checked
the firmware installed on once again had the latest firmware installed. What
can I say!  I think the Ham Radio the gremlins that reside in everyone's
shack had their fun and stopped playing with me

 

I'm glad I'm not a Triskaidekaphobic!

 

  

Irwin - KD3TB

 

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Re: [Elecraft] K3 always in TX with WSJT

[Stan Gibbs]

Isn't it amazing how many use cases (hardware configurations) a piece of
software like the MicroHam router has to support.

Thanks for the help, Joe!


-
73, Stan - KR7C
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit [End of follow on thread]

[Eric Swartz - WA6HHQ, Elecraft]

[Let's end this thread.]

These postings are specifically allowed and encouraged.

73, Eric
Elecraft List Moderator
---


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Re: [Elecraft] KPA500 with K3 in TUNE mode?

[Eric Swartz - WA6HHQ, Elecraft]

There is a menu option for the KPA500 that automatically drops it into 
standby on a new band change just for this purpose. (Normally defaulted 
to OFF.)

Band data is sent from the K3 to the KPA500 via the binary band-data 
lines, not the AUXBUS.



73, Eric  WA6HHQ


On 5/13/2011 5:48 AM, Randy Farmer wrote:
> I didn't realize the AUXBUS comms were one-way. Turning the TUNE level
> down to a few Watts would work OK with the 235 and the KPA500 on-line.
> Unfortunately, I have another antenna matched with a SG-230 that I want
> to use as well. I don't know if the low level would be enough for the
> 230 or not. I'll do some experimenting to see what it takes.
>
> It would be nice if an Amp Inhibit signal were available. Maybe some day.
>
> Thanks for the advice.
>
> 73...
> Randy, W8FN
>> T
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[Elecraft] LED's in K2 keycaps

[John Cooper]

Ok Ive got LEd’s in the keycaps in the Mode/Vox switch for transmit A=B/Split 
for rit/xit/ and split mode, and XFIL/AFIL for audio filter on.

Still Planning on the rant switch light in the ANT 1/2/TUNE button when I buy 
the 160M option and the CW zero beat light in the PRE/ATT/SPOT cap.

  Now I wanna do the same thing for Rate/LOCK key to light when you have the 
VFO knob locked out and for the NB/LEVEL switch when the NB is on.  Has anyone 
looked at adding lights for these 2 functions?  


John WT5Y
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

[Hector Padron]

 
 That's right Gary,you don't like it,just delete it but let the guy tell others 
about his good work.
Well I turn my radio every morning at 6:00AM tune around from 7125 to 7200 and 
if there is any VK or ZL or JA,work him out,then in half an hour have my 
breakfast,get dressed and go to work,UH! Did I say work? Hell no,not 
anymore,today 5/7/11  I am officially retired from the US government job after 
20 years of service,so that means now I will have more time to play with my 
radios and antennas, hope to contact you soon,73
 
AD4C
 

"If freedom means something,it is the right to tell others what they don't want 
to hear" –George Orwell

From: Hector Padron 
To: Gary Gregory 
Sent: Friday, May 13, 2011 11:31 AM
Subject: Re: [Elecraft] Let me build you a new K2 or other Elecraft kit


That's right Gary,you don't like it,just delete it but let the guy tell others 
about his good work.
Well I turn my radio every morning at 6:00AM tune around from 7125 to 7200 and 
if there is any VK or ZL or JA,work him out,then in half an hour have my 
breakfast,get dressed and go to work,UH! Did I say work? Hell no,not 
anymore,today 5/7/11  I am officially retired from the US government job after 
20 years of service,so that means now I will have more time to play with my 
radios and antennas, hope to contact you soon,73
 
AD4C
 
 

"If freedom means something,it is the right to tell others what they don't want 
to hear" –George Orwell

From: Gary Gregory 
To: Hector Padron 
Cc: "elecraft@mailman.qth.net" 
Sent: Friday, May 13, 2011 6:28 AM
Subject: Re: [Elecraft] Let me build you a new K2 or other Elecraft kit


I agree Hectorthere is always the delete key I think?...:-) 

Working FL each morning Hector...where are you hiding these days?...Grin

73's Hector, good to see you still posting.

Gary


On 13 May 2011 20:19, Hector Padron  wrote:

"occur often enough to be offensive"
> 
>How come a simple AD like that could be "offensive" ? Even If I see it every 
>week it will not bother me at all.its a simple way to let us know someone has 
>enough skills to help us out building K2 and K1's.I think its a great idea to 
>promote his help and nobody should be offended at all.
> 
>AD4C
> 
> 
>
>"If freedom means something,it is the right to tell others what they don't 
>want to hear" –George Orwell
>
>From: Jim Wiley 
>To: ""Poul Erik Karlshøj (PKA)"" 
>Cc: Elecraft 
>Sent: Friday, May 13, 2011 6:04 AM
>Subject: Re: [Elecraft] Let me build you a new K2 or other Elecraft kit
>
>
>
>No.  Alan has been building K2s for sometime for those hams that don't
>have the time or skills to build their own.  There are others who offer
>the same service.  You will see their "ads" occasionally.  As you
>probably know, assembled K2 systems are not available from the factory. 
>They are kit only.
>
>
>This sort of thing is permitted on this list as long as it does not
>occur often enough to be offensive.  Eric (our moderator) says about
>once or twice a month is usually enough.
>
>
>- Jim, KL7CC
>
>
>
>Poul Erik Karlshøj (PKA) wrote:
>> SPAM mail?
>>
>> 
>
>> -Oprindelig meddelelse-
>>
>> Emne: [Elecraft] Let me build you a new K2 or other Elecraft kit
>>
>>
>> I have built more than 265 K2's to date.  The K2 is still a great little 
>> radio.  Let me build one for you.  You receive a new radio with the options 
>> you want.  My prices are reasonable.  Please respond off of the reflector.
>> 
>> 73
>> Alan
>> W1HYV                        
>> __
>>
>> 
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-- 

VK4FD - Motorhome Mobile
Elecraft Equipment
K3 #679, KPA-500 #018
Living the dream!!!
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Re: [Elecraft] K3 vs RigExperts SWR meter issue

[Alexander Sack]

On Mon, May 9, 2011 at 6:03 PM, Jeff Cochrane - VK4BOF
 wrote:
> Hi Alexander,
> I see this a lot with my K3.
> The truth is that the KAT3 is never really out of circuit.
> The trick is to enable the KAT3 (Hold ATU Tune), use it to show a low VSWR
> to the rigs finals, then disable it (Hold ATU TUNE) again.
> You will then find that the VSWR will presented to the rig will be correct
> as per the analyser.
> I don't why the KAT3 still appears to be in circuit when supposedly switched
> out but at least there is a workaround.

That works!  I tried it last night (been busy).  I had a 1.5 on my
RigExpert and the K3 confirmed it.  You absolutely have to tune it
FIRST or the VSWR will be off.  Seems strange.

@Elecraft (Wayne/Eric/Alan, etc):

Can you confirm this is by design?  :-)

And what does *bypass* do exactly?  I would assume leave the circuit
tuned based on the last push of the ATU button which of course maybe
wrong depending on what frequency you are on (which is why I initially
had a "HI SWR" message.

73

-aps
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Re: [Elecraft] K3 always in TX with WSJT

[Joe Subich, W4TV]

> I'm not 100% clear on WHEN that option would be used in preference to
> COM port PTT, but, with WSJT it is clearly a problem.

The Sound card PTT option is useful for software that has no other PTT
support - or no means of PTT support *except* CAT commands with rigs
that don't support PTT via CAT (e.g., old Icom, etc.).

73,

... Joe, W4TV


On 5/13/2011 10:33 AM, Stan Gibbs wrote:
> Joe,
>
> Thanks for the response, you were 100% on target!  I was a bit lazy, I
> guess, when I set up the preset for WSJT, and didn't clear the "Sound card
> PTT" check box on the PTT tab.  I'm not 100% clear on WHEN that option would
> be used in preference to COM port PTT, but, with WSJT it is clearly a
> problem.
>
> WSJT is working great, thanks!!
>
>
> Joe Subich, W4TV-4 wrote:
>>
>> Do you have "Sound card PTT" checked on the PTT tab in microHAM Router?
>>
>
>
> -
> 73, Stan - KR7C
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/K3-always-in-TX-with-WSJT-tp6358024p6359649.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] [K3] Variable filters? And what filter is best for AMbroadcast reception?

[Matt Zilmer]

It's a tradeoff.  13 KHz gets you FM capability on TX, but should not
be used for AM.  The 6 KHz filter is adequate for SWL and allows AM
TX.

Personally, I have no need for AM TX, so using the 13 KHz filters (one
in each RX), also allowing regular FM on TX/RX.  This is useful if you
have the K144XV 2m transverter.  The 13 KHz filters work fine for AM
RX.  Because I operate on MARS freqs, the KBPF3 is also a necessary
ingredient and I have one on both receivers.  Same thing for you to
use in SWL work.  Your only limitation is reduced sensitivity around
the 8.2 MHz IF, and TX is hard-locked out from 7.5 to 9.0 MHz.  The K3
RX also won't show the specified sensitivity in between ham bands,
when the KBPF3 is in use.

The KBPF3 doesn't give the front end protection that the bandpass
filters do, but it gives you at least reasonable sensitivity between
the ham banads.

73,
matt W6NIA

On Fri, 13 May 2011 11:06:52 +0100, you wrote:

>Hi,
>
>I read somewhere, some time ago, that there was a plan to introduce variable
>filters to the K3.
>
>Do any such filters exist, either as 3rd party mods or official by
>Elecraft/Inrad? And is there any firmware support for this?
>
>I already have 2*2.7kHz and 2*500Hz in my K3, plus a 2.1kHz in the main
>receiver only, but I would like a wider filter for AM-broadcast SWL and AM
>TX/RX.
>
>Also, I would like to listen to shortwave broadcast stations so I was
>planning to get the KBPF3 and additional filters. As far as I can tell the
>best filter for this would be KFL3B-FM, to capture the wide signals of the
>broadcast stations in the highest possible quality, is that correct or is
>the KFL3A-6K more useful? And can I transmit 6kHz AM with the 13kHz FM
>filter or must I have the 6kHz one as well?
>
>73, Thomas M0TRN
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Re: [Elecraft] K3 always in TX with WSJT

[Stan Gibbs]

Joe,

Thanks for the response, you were 100% on target!  I was a bit lazy, I
guess, when I set up the preset for WSJT, and didn't clear the "Sound card
PTT" check box on the PTT tab.  I'm not 100% clear on WHEN that option would
be used in preference to COM port PTT, but, with WSJT it is clearly a
problem.

WSJT is working great, thanks!!


Joe Subich, W4TV-4 wrote:
> 
> Do you have "Sound card PTT" checked on the PTT tab in microHAM Router?
> 


-
73, Stan - KR7C
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Re: [Elecraft] KPA500 with K3 in TUNE mode?

[Nels Anderson]

I'm confused as to why the aux bus is referred to as being one way.

Just received KPA500 #32 yesterday and starting playing around with it. 
When I change bands on the K3 the band automatically changes on the 
KPA500 (as indicated by the display). When I use one of the band buttons 
on the KPA500 to change bands, the same band change takes place on the 
K3. To me that sounds like two way communications. Still more learning 
to do to maximize ease of operation though :-)

73 Nels K1UR

On 5/13/2011 8:48 AM, Randy Farmer wrote:
> I didn't realize the AUXBUS comms were one-way. Turning the TUNE level
> down to a few Watts would work OK with the 235 and the KPA500 on-line.
> Unfortunately, I have another antenna matched with a SG-230 that I want
> to use as well. I don't know if the low level would be enough for the
> 230 or not. I'll do some experimenting to see what it takes.
>
> It would be nice if an Amp Inhibit signal were available. Maybe some day.
>
> Thanks for the advice.
>
> 73...
> Randy, W8FN
>> The AUXBUS provides one-way communication between the KPA500 and the K3
>> (KPA500 to K3).  So the KPA500 won't know that the K3 is in TUNE mode.  The
>> KPA500 has about 12-13 dB gain, so if the SG235 can take up to 100 watts
>> without problems, you could set the TUNE mode to output no more than 5-watts
>> for tuning.  Unfortunately the K3 amp-enable output is always active whether
>> in TUNE mode or normal operating mode (I understand this is hard-wired and
>> so can't be changed in firmware).
>>
>> What would be nice is if the K3 would output a signal (Dig Out 0 or Dig Out
>> 1?) that would feed the amp-inhibit input on the KPA500 (pin 11) when you
>> press TUNE on the K3.  Not sure if this is possible, but that would do the
>> trick.
>>
>> Phil - AD5X
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Re: [Elecraft] [K3] Variable filters? And what filter is best for AMbroadcast reception?

[Joe Subich, W4TV]

> The a.m. receive audio passband was 4Khz wide with either filter.
> The  13Khz filter did not provide wider audio as expected in my K3.

Unless your AM filter is significantly wider than the published 6 KHz
or you are using the Sync detector with the IF filter offset for one
sideband, the AM filter can not produce a flat audio response to the
full 4.2 KHz allowed by the DSP with the added analog lowpass filter,

If the AM filter is doing its job (based on the published selectivity 
at: http://www.elecraft.com/K3/K3_8_pole_plots.htm) and the filter is
centered on the carrier frequency, the audio response should be down
by nearly 40 dB at 4 KHz compared to response at 3 KHz.

73,

... Joe, W4TV

On 5/13/2011 9:34 AM, Barry N1EU wrote:
>
> Craig D. Smith wrote:
>>
>> For this purpose, the 13 KHz is better as you point out.
>>
> FWIW, I directly compared the 6Khz and 13Khz filters on AM receive in my K3,
> which has the latest dsp updates (includes a 4Khz low pass audio filter).
> The a.m. receive audio passband was 4Khz wide with either filter.  The 13Khz
> filter did not provide wider audio as expected in my K3.
>
> Barry N1EU
>
>
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/K3-Variable-filters-And-what-filter-is-best-for-AM-broadcast-reception-tp6358819p6359445.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] [K3] Variable filters? And what filter is best for AMbroadcast reception?

[Barry N1EU]

Craig D. Smith wrote:
> 
> For this purpose, the 13 KHz is better as you point out.  
> 
FWIW, I directly compared the 6Khz and 13Khz filters on AM receive in my K3,
which has the latest dsp updates (includes a 4Khz low pass audio filter). 
The a.m. receive audio passband was 4Khz wide with either filter.  The 13Khz
filter did not provide wider audio as expected in my K3.

Barry N1EU


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Re: [Elecraft] KPA500 with K3 in TUNE mode?

[Randy Farmer]

That's just what I'm going to do. With all of the brain power in the K 
line I had just hoped that the system might do it for me. Looks like it 
won't. It just seems to me that if you have a no-tune amplifier, the 
TUNE function must logically be for tuning something other than the amp, 
and whatever that is it probably doesn't need to be done at high power.

73...
Randy, W8FN

On 05/11/2011 00:06, n...@n5ge.com wrote:
> Hello Randy,
>
> You should put the Amplifier in standby and let the tuner tune from the K3's
> Tune power.  That applies to all amplifiers.  It doesn't make any difference
> what brand of amplifier or what type of tuner you have you have.
>
> The safe way to tune a tuner before applying amplifier power is what I 
> described
> above, no matter what it's final output will be.
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Re: [Elecraft] KPA500 with K3 in TUNE mode?

[Randy Farmer]

Maybe I should have said "operator headspace overhead" instead. As I get 
older, I seem to be taking more and more advantage of every opportunity 
to screw up. Change bands, rate turns to crap, takes longer and longer 
to look at the lights and realize the amp's not engaged. It's bound to 
happen.

You're right about how times have changed. I remember way back in '65 
when I got a Johnson T/R switch installed to replace the old plastic 
DPDT knife switch in my Novice station. I thought I'd died and gone to 
heaven. Remember the colored tape on the front panels of the C-lines, 
TS-830s and L-4Bs to mark the settings for each band for fast QSY? Now 
here I am bellyaching about having to push one stupid switch. This 
high-tech stuff is WAY too addictive, but it sure is fun!

73...
Randy, W8FN

> While automating this (disable PTT to the amp for the first transmission
> after a band change - just like Tokyo Hy-Power does) should be part of the
> eventual Elecraft tuner /amp implementation, and not just when in tune mode,
> I'm surprised that pressing the "OPER/STBY" button on the front panel of the
> KPA500 constitutes "a lot of ergonomic overhead"?
>
> I think of what was "normal" with something like a Drake C-line, MN2000
> tuner and L4B amplifier. Now, there's some ergonomic overhead!
>
> Times and perspectives certainly have changed.
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Re: [Elecraft] KPA500 with K3 in TUNE mode?

[Randy Farmer]

I didn't realize the AUXBUS comms were one-way. Turning the TUNE level 
down to a few Watts would work OK with the 235 and the KPA500 on-line. 
Unfortunately, I have another antenna matched with a SG-230 that I want 
to use as well. I don't know if the low level would be enough for the 
230 or not. I'll do some experimenting to see what it takes.

It would be nice if an Amp Inhibit signal were available. Maybe some day.

Thanks for the advice.

73...
Randy, W8FN
> The AUXBUS provides one-way communication between the KPA500 and the K3
> (KPA500 to K3).  So the KPA500 won't know that the K3 is in TUNE mode.  The
> KPA500 has about 12-13 dB gain, so if the SG235 can take up to 100 watts
> without problems, you could set the TUNE mode to output no more than 5-watts
> for tuning.  Unfortunately the K3 amp-enable output is always active whether
> in TUNE mode or normal operating mode (I understand this is hard-wired and
> so can't be changed in firmware).
>
> What would be nice is if the K3 would output a signal (Dig Out 0 or Dig Out
> 1?) that would feed the amp-inhibit input on the KPA500 (pin 11) when you
> press TUNE on the K3.  Not sure if this is possible, but that would do the
> trick.
>
> Phil - AD5X
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Re: [Elecraft] [K3] Variable filters? And what filter is best for AMbroadcast reception?

[Craig D. Smith]

Good Morning Thomas ...

The variable BW filter concept was pitched early on - before the K3 was
first produced.  But nothing has come of it, so don't hold your breath.
Even if it does materialize, it probably wouldn't cover an extremely broad
range, such as 10 KHz to CW widths.

So go ahead and purchase either the 6 KHz or the 13 KHz for SW and BCB AM
listening.  For this purpose, the 13 KHz is better as you point out.  That
is what I use.  But if you plan on transmitting on AM you will need the 6
KHz filter.

73   Craig  AC0DS



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Re: [Elecraft] [K3] Variable filters? And what filter is best for AM broadcast reception?

[Don Wilhelm]

  Thomas,

As I recall, the variable filter concept has been dropped.  Even if it 
were to be available, it would be only a narrow filter, not a wide one.

The 13 kHz filter can be used for FM transmit and receive, but only for 
AM receive - you must have the 6 kHz filter for AM transmit.  The folks 
at Elecraft are reluctant to allow the 13 kHz filter to be used for AM 
transmit because of the potential for spurs.  A couple of users have 
reported here on the reflector that they have "lied" to the K3 about the 
filter width and tried it, but I am not certain how rigorously that 
setup was tested.

So the bottom line is that you need the real 6 kHz filter to transmit AM 
or ESSB.  The 13 kHz filter will work nicely for AM receive, although 
synchronous AM reception can be used with just as wide an audio 
passband, so you might want to investigate that approach and get the 6 
kHz filter if you do not anticipate using FM.

73,
Don W3FPR

On 5/13/2011 6:06 AM, Thomas Horsten wrote:
> Hi,
>
> I read somewhere, some time ago, that there was a plan to introduce variable
> filters to the K3.
>
> Do any such filters exist, either as 3rd party mods or official by
> Elecraft/Inrad? And is there any firmware support for this?
>
> I already have 2*2.7kHz and 2*500Hz in my K3, plus a 2.1kHz in the main
> receiver only, but I would like a wider filter for AM-broadcast SWL and AM
> TX/RX.
>
> Also, I would like to listen to shortwave broadcast stations so I was
> planning to get the KBPF3 and additional filters. As far as I can tell the
> best filter for this would be KFL3B-FM, to capture the wide signals of the
> broadcast stations in the highest possible quality, is that correct or is
> the KFL3A-6K more useful? And can I transmit 6kHz AM with the 13kHz FM
> filter or must I have the 6kHz one as well?
>
> 73, Thomas M0TRN
>
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

[Gary Gregory]

I agree Hectorthere is always the delete key I think?...:-)

Working FL each morning Hector...where are you hiding these days?...Grin

73's Hector, good to see you still posting.

Gary

On 13 May 2011 20:19, Hector Padron  wrote:

> "occur often enough to be offensive"
>
> How come a simple AD like that could be "offensive" ? Even If I see it
> every week it will not bother me at all.its a simple way to let us know
> someone has enough skills to help us out building K2 and K1's.I think its a
> great idea to promote his help and nobody should be offended at all.
>
> AD4C
>
>
>
> "If freedom means something,it is the right to tell others what they don't
> want to hear" –George Orwell
>
> From: Jim Wiley 
> To: ""Poul Erik Karlshøj (PKA)"" 
> Cc: Elecraft 
> Sent: Friday, May 13, 2011 6:04 AM
> Subject: Re: [Elecraft] Let me build you a new K2 or other Elecraft kit
>
>
>
> No.  Alan has been building K2s for sometime for those hams that don't
> have the time or skills to build their own.  There are others who offer
> the same service.  You will see their "ads" occasionally.  As you
> probably know, assembled K2 systems are not available from the factory.
> They are kit only.
>
>
> This sort of thing is permitted on this list as long as it does not
> occur often enough to be offensive.  Eric (our moderator) says about
> once or twice a month is usually enough.
>
>
> - Jim, KL7CC
>
>
>
> Poul Erik Karlshøj (PKA) wrote:
> > SPAM mail?
> >
> >
>
> > -Oprindelig meddelelse-
> >
> > Emne: [Elecraft] Let me build you a new K2 or other Elecraft kit
> >
> >
> > I have built more than 265 K2's to date.  The K2 is still a great little
> radio.  Let me build one for you.  You receive a new radio with the options
> you want.  My prices are reasonable.  Please respond off of the reflector.
> >
> > 73
> > Alan
> > W1HYV
> > __
> >
> >
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
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> __
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-- 

VK4FD - Motorhome Mobile
Elecraft Equipment
K3 #679, KPA-500 #018
Living the dream!!!
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

[Hector Padron]

"occur often enough to be offensive"
 
How come a simple AD like that could be "offensive" ? Even If I see it every 
week it will not bother me at all.its a simple way to let us know someone has 
enough skills to help us out building K2 and K1's.I think its a great idea to 
promote his help and nobody should be offended at all.
 
AD4C
 
 

"If freedom means something,it is the right to tell others what they don't want 
to hear" –George Orwell

From: Jim Wiley 
To: ""Poul Erik Karlshøj (PKA)"" 
Cc: Elecraft 
Sent: Friday, May 13, 2011 6:04 AM
Subject: Re: [Elecraft] Let me build you a new K2 or other Elecraft kit



No.  Alan has been building K2s for sometime for those hams that don't 
have the time or skills to build their own.  There are others who offer 
the same service.  You will see their "ads" occasionally.  As you 
probably know, assembled K2 systems are not available from the factory.  
They are kit only.


This sort of thing is permitted on this list as long as it does not 
occur often enough to be offensive.  Eric (our moderator) says about 
once or twice a month is usually enough.


- Jim, KL7CC



Poul Erik Karlshøj (PKA) wrote:
> SPAM mail?
>
>  

> -Oprindelig meddelelse-
>
> Emne: [Elecraft] Let me build you a new K2 or other Elecraft kit
>
>
> I have built more than 265 K2's to date.  The K2 is still a great little 
> radio.  Let me build one for you.  You receive a new radio with the options 
> you want.  My prices are reasonable.  Please respond off of the reflector.
>  
> 73
> Alan
> W1HYV                         
> __
>
>  
__
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[Elecraft] [K3] Variable filters? And what filter is best for AM broadcast reception?

[Thomas Horsten]

Hi,

I read somewhere, some time ago, that there was a plan to introduce variable
filters to the K3.

Do any such filters exist, either as 3rd party mods or official by
Elecraft/Inrad? And is there any firmware support for this?

I already have 2*2.7kHz and 2*500Hz in my K3, plus a 2.1kHz in the main
receiver only, but I would like a wider filter for AM-broadcast SWL and AM
TX/RX.

Also, I would like to listen to shortwave broadcast stations so I was
planning to get the KBPF3 and additional filters. As far as I can tell the
best filter for this would be KFL3B-FM, to capture the wide signals of the
broadcast stations in the highest possible quality, is that correct or is
the KFL3A-6K more useful? And can I transmit 6kHz AM with the 13kHz FM
filter or must I have the 6kHz one as well?

73, Thomas M0TRN
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

[Jim Wiley]

No.  Alan has been building K2s for sometime for those hams that don't 
have the time or skills to build their own.   There are others who offer 
the same service.  You will see their "ads" occasionally.   As you 
probably know, assembled K2 systems are not available from the factory.  
They are kit only.


This sort of thing is permitted on this list as long as it does not 
occur often enough to be offensive.  Eric (our moderator) says about 
once or twice a month is usually enough.


- Jim, KL7CC



Poul Erik Karlshøj (PKA) wrote:
> SPAM mail?
>
>   

> -Oprindelig meddelelse-
>
> Emne: [Elecraft] Let me build you a new K2 or other Elecraft kit
>
>
> I have built more than 265 K2's to date.  The K2 is still a great little 
> radio.  Let me build one for you.  You receive a new radio with the options 
> you want.  My prices are reasonable.  Please respond off of the reflector.
>  
> 73
> Alan
> W1HYV   
> __
>
>   
__
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Re: [Elecraft] Let me build you a new K2 or other Elecraft kit

[PKA]

SPAM mail?

-Oprindelig meddelelse-
Fra: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] 
På vegne af Alan Price
Sendt: 13. maj 2011 03:55
Til: Elecraft
Emne: [Elecraft] Let me build you a new K2 or other Elecraft kit


I have built more than 265 K2's to date.  The K2 is still a great little radio. 
 Let me build one for you.  You receive a new radio with the options you want.  
My prices are reasonable.  Please respond off of the reflector.
 
73
Alan
W1HYV 
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