[Elecraft] WTB: PX3

[nz8j]

Looking for a PX3, if you have one for sale please send details to include age, 
condition and price sent priority mail ti zip 45324
Please contact direct to n...@woh.rr.com , also prefer to pay by paypal.
ThanksTimNZ8J
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Re: [Elecraft] Missing first piece of dash or dot when sending CW with K3S USB input with Wintest.

[Bob Wilson, N6TV]

Are you connecting the amplifier to the TX Inhibit pin of the K3 ACC port?
Do you have CONFIG:TX INH set to Low=Inh or Hi=Inh?  You must first set
CONFIG:TECH MD ON to see it.  Try changing TX INH to OFF.

>From the Expert 2K-FA manual, section 13.3:

"All modern transceivers have a delay before the transmission to allow the
linear to
stabilize their relays avoiding damage to them and possible effects of "Hot
Switching".
The Expert 2K-FA has a settling time of only 6.5 msec. compatible with all
modern
transceivers (see the manual of the transceiver).
Some transceivers have an input (called TX-INHIBIT, LINEAR, MUTE, etc..)
which
disables the transmission.
*This input can be used with transceivers that do not have such delay *or,
more generally,
to improve the safety of switching."

So unless you are using CW QRQ mode in the K3 (and PTT lead=0 in Win-Test),
the relay should close well before the RF is output, so it   should not be
necessary to enable TX INH at all.

73,
Bob, N6TV

On Jul 13, 2017 7:58 PM, "VA2EW"  wrote:

> Thanks guys for your fast answers and suggestions.
>
> After having read you, I made several tests.
>
> I have observed some very strange things leading me to think that the K3
> USB by itself is not involved:
>
> The problem occurs only when the amplifier (Expert 2K-FA) is in operate
> mode and whatever the output power even 50W in a dummy load (the RF is not
> involved).
>
> The problem disappears when I put 0 ms as well as 30ms in the "CW-PTT ON
> delay" of the interface configuration of Win-test.
> That delay is the time between the initial PTT ON signal and the first CW
> sending.
> The problem comes back when I put my initial 12ms setting. So why 0 and 30
> are ok and not 12ms...that's the strange thing?
>
> I'm starting to think that there is something related with the inhibit
> output of the amplifier, when there is an inhibit signal at the input of
> the K3, the transmission stops and we cannot hear anymore the transmitted
> CW. So, maybe the USB is correctly doing its job but the inhibit signal is
> hiding it.
>
> You could tell me :" you have found a solution so stop digging" but I do
> not like when things are floating around in the station so I have to put an
> oscilloscope in all that and check the timings.
>
> I'll tell you if I find something interesting for the reflector
>
> 73, Gilles VA2EW
>
>
>
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Re: [Elecraft] Interesting meter

[David Christ]

The first question that comes to mind is  “How do we know that SWR stands for 
Standing Wave Ratio?”

David K0LUM


> On Jul 13, 2017, at 10:22 PM, Howard Hoyt  wrote:
> 
> Hi all,
> 
> I figured maybe one of you was, um, experienced enough to recognize this 
> meter and let me know what piece of equipment it came from.  I found it in a 
> cache of old broadcast equipment, so it is possible it was part of an old 
> carrier current transmitter or some other such thing.  This is the link to 
> the picture:
> 
> https://proaudioeng.com/swr-meter/
> 
> Cheers & 73,
> 
> Howie - WA4PSC
> 
> __



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[Elecraft] Interesting meter

[Howard Hoyt]

Hi all,

I figured maybe one of you was, um, experienced enough to recognize this 
meter and let me know what piece of equipment it came from.  I found it 
in a cache of old broadcast equipment, so it is possible it was part of 
an old carrier current transmitter or some other such thing.  This is 
the link to the picture:


https://proaudioeng.com/swr-meter/

Cheers & 73,

Howie - WA4PSC

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Re: [Elecraft] Missing first piece of dash or dot when sending CW with K3S USB input with Wintest.

[VA2EW]

Thanks guys for your fast answers and suggestions.

After having read you, I made several tests.

I have observed some very strange things leading me to think that the K3 
USB by itself is not involved:


The problem occurs only when the amplifier (Expert 2K-FA) is in operate 
mode and whatever the output power even 50W in a dummy load (the RF is 
not involved).


The problem disappears when I put 0 ms as well as 30ms in the "CW-PTT ON 
delay" of the interface configuration of Win-test.
That delay is the time between the initial PTT ON signal and the first 
CW sending.
The problem comes back when I put my initial 12ms setting. So why 0 and 
30 are ok and not 12ms...that's the strange thing?


I'm starting to think that there is something related with the inhibit 
output of the amplifier, when there is an inhibit signal at the input of 
the K3, the transmission stops and we cannot hear anymore the 
transmitted CW. So, maybe the USB is correctly doing its job but the 
inhibit signal is hiding it.


You could tell me :" you have found a solution so stop digging" but I do 
not like when things are floating around in the station so I have to put 
an oscilloscope in all that and check the timings.


I'll tell you if I find something interesting for the reflector

73, Gilles VA2EW



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[Elecraft] K3 NR and KIO3B INTERFACE

[Peter Pellack via Elecraft]

  Last year we upgraded one of the K3's with the installation of the KIO3B 
interface kit. Shortly after we noticed that the NR sounded different. Like an 
"echo", even on the least aggressive setting. The NR performance appeared to 
have significantly suffered. Coincidence with the KIO3B installation ? We put 
the K3 on the shelf and used the backup K3 w/o the upgraded IO board.  Two 
months ago we upgraded the backup K3 with the KIO3B interface. Guess what, the 
same issue,the NR reduction has suffered the same symptoms as the 1st K3 ! What 
is going on here ? Tnx,73,Peter,HS0ZKX 
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Re: [Elecraft] Missing first piece of dash or dot when sending CW with K3S USB input with Wintest.

[Bob Wilson, N6TV]

I did not experience any problems like that during 24 hours of the IARU
contest keying a pair of K3S rigs with Win-Test over the USB line, in full
QSK mode, on a single computer (which was running Windows 7 32-bit).  With
Win-Test's excellent software CW timing, there's usually no need to buy a
WinKey.

The suggestion to check the USB Power Management settings is a good one.

I think further questions about this should be addressed in the Win-Test
reflector , since
this is unlikely to be a K3S problem.

73,
Bob, N6TV

On Thu, Jul 13, 2017 at 3:31 PM, VA2EW  wrote:

> Last WE during the IARU HF I have tested the use of the USB input of the
> K3S in replacement of a RIGEXPERT TI-5 box.
>
> Everything looked great until I experimented that sometimes randomly the
> beginning of the first dash or dot was missing when sending CW via Wintest
> under Windows 10.
>
> I guess it is a real-time related problem with USB under Windows.
>
> Is there someone who have a solution to fix that or must I come back to
> the RIGEXPERT or eventually add a Winkeyer ?
>
> 73,s
>
> Gilles VA2EW
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Re: [Elecraft] Missing first piece of dash or dot when sending CW with K3S USB input with Wintest.

[Brian Hunt]

It's possible that Windows 10 is powering down the hub that the device 
is connected to.  In the Windows 10 Settings dialog click on devices and 
scroll all the way down to the bottom and select Device Manager.   Then 
click on USB controllers to open and view all the hubs.  Double click on 
each hub and select the Power Management tab and then uncheck the box 
that allows the computer to turn off the device to save power.  See if 
that helps.


Also make sure that Windows Sounds are off.  This is because Windows may 
stop all I/O including USB when it's doing a sound.  (Or at least that's 
what I've heard).


Good Luck!

73,
Brian, K0DTJ

On 7/13/2017 15:31, VA2EW wrote:

Hi all,

Last WE during the IARU HF I have tested the use of the USB input of 
the K3S in replacement of a RIGEXPERT TI-5 box.


Everything looked great until I experimented that sometimes randomly 
the beginning of the first dash or dot was missing when sending CW via 
Wintest under Windows 10.




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Re: [Elecraft] Missing first piece of dash or dot when sending CW with K3S USB input with Wintest.

[Don Wilhelm]

Gilles,

As long as you are dependent on an application running on the PC for 
timing, you will have similar problems. Windows prioritizes the timing 
of events to its own pleasure, and servicing the application is not 
necessarily of the highest priority. It is normally not noticed, but 
with things like CW keying where timing is critical, the operating 
system gets in the way.
Back in the old DOS days when the currently running application had the 
full attention and command of computer resources, this was not a problem 
- back then, there was no "background processing".

The Winkey is the solution normally employed to attack that problem.

If you do not want to invest in the Winkeyer, then confine yourself to 
running only the application that is doing the CW keying.  The more 
applications you have running at the same time, the worse the contention 
for computer resources becomes.


73,
Don W3FPR

On 7/13/2017 6:31 PM, VA2EW wrote:

Hi all,

Last WE during the IARU HF I have tested the use of the USB input of the 
K3S in replacement of a RIGEXPERT TI-5 box.


Everything looked great until I experimented that sometimes randomly the 
beginning of the first dash or dot was missing when sending CW via 
Wintest under Windows 10.


I guess it is a real-time related problem with USB under Windows.

Is there someone who have a solution to fix that or must I come back to 
the RIGEXPERT or eventually add a Winkeyer ?



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[Elecraft] Missing first piece of dash or dot when sending CW with K3S USB input with Wintest.

[VA2EW]

Hi all,

Last WE during the IARU HF I have tested the use of the USB input of the 
K3S in replacement of a RIGEXPERT TI-5 box.


Everything looked great until I experimented that sometimes randomly the 
beginning of the first dash or dot was missing when sending CW via 
Wintest under Windows 10.


I guess it is a real-time related problem with USB under Windows.

Is there someone who have a solution to fix that or must I come back to 
the RIGEXPERT or eventually add a Winkeyer ?


73,s

Gilles VA2EW


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Re: [Elecraft] K3 with 2m tvtr - power control feature request

[Graham Kimbell]

Thanks to everyone who answered this both private and public. To recap, 
I'm using the internal 2m transverter K144XV and trying to reduce the 
output on 2m below 1W whilst keeping the max of 10W.  I conclude:


   * the 2m internal tvtr cannot be adjusted to produce both 10W out
 max and 1W out min
   * this is a generic issue, not specific to my K3, and not due to
 oscillation or other fault
   * it would be preferable to integrate the 2m tvtr and control it by
 measuring the power out as per other bands but this probably
 requires a hardware change
   * the issue has been around for a couple of years without resolution
   * users will have to find work-arounds, probably in external circuitry


Graham

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Re: [Elecraft] Just a test

[ab2tc]

Hi Don,

It is indeed very quiet nut the reflector is working just fine. As you said,
it looks like everybody is on a vacation. State parks typically have no
Wi-Fi.

Knut


Don Wilhelm wrote
> I have not seen many posts on the reflector in the last couple days.
> Just wondering if everyone is on vacation or the reflector is not working.
> 
> 73,
> Don W3FPR
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--
View this message in context: 
http://elecraft.365791.n2.nabble.com/Just-a-test-tp7632396p7632408.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] no longer interested in buying a K-2

[Mark Paley]

I managed to repair my Yaesu FT-747SX so I'm not needing a K-2. Thanks 
to all who replied.


Mark--K8LD--

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Re: [Elecraft] Using a KX2 with an SP3 external speaker ?

[Walter Underwood]

I use a 15 W per channel amp that runs off of 12 V. It costs about $10 (price 
varies) from Amazon. I wrote it up on my blog.

https://observer.wunderwood.org/2017/03/04/speakers-for-my-elecraft-kx3/ 


This amp and the one Dave recommends are both built around a TDA audio amp IC.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jul 12, 2017, at 11:40 PM, Dave AD6A  wrote:
> 
> Phil,
> 
> I use a little 7W mono amp from MCM electronics that gives plenty of punch
> into a small comms speaker.
> I've tried it with the SP3 also - works just fine. I also use one with my
> KX3 on my 10/24GHz portable rig.
> 
> It's part number 809077 at MCM here
> http://electronics.mcmelectronics.com/search?w=809077
> 
> 73,Dave, AD6A
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad
> Sent: Wednesday, July 12, 2017 10:56 PM
> To: elecraft 
> Subject: [Elecraft] Using a KX2 with an SP3 external speaker ?
> 
> So far, I have mostly used my KX2 with headphones but I just acquired the
> KXPA100 100-watt amplifier so will be using the KX2 plus KXPA100 for a
> backup base station.  And, I think I want to use an external speaker.
> Preferably my  Elecraft SP3.
> 
> I understand that the KX2 requires the Headphones output to be amplified for
> use with something like the SP3.  Has anyone built their own little audio
> amp or maybe just purchased one for using with the SP3?
> 
> Or, any other ideas would be welcome as well.
> 
> 73, phil, K7PEH
> 
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> 
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Re: [Elecraft] Head phone/speaker question, time set

[Bob McGraw K4TAX]

Just be sure your computer clock is updated before doing this. I use 
this method frequently by allowing the computer to automatically and 
electronically update to a time standard.  The Utility is free for 
download from the Elecraft website.


Also I use the utility to store the latest configuration.  This is good 
in case something gets messed up or "some friend" decides to turn knobs 
and push buttons.


73

Bob, K4TAX


On 7/13/2017 8:42 AM, Mark E. Musick wrote:

You can use the K3 utility to set the clock.
Select the Configuration tab and there is a button at the bottom labeled
"Set K3 Date and Time".





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Re: [Elecraft] Head phone/speaker question, time set

[Mark E. Musick]

You can use the K3 utility to set the clock.
Select the Configuration tab and there is a button at the bottom labeled
"Set K3 Date and Time".

Mark, WB9CIF

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rick Stealey
Sent: Thursday, July 13, 2017 12:06 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Head phone/speaker question, time set

Gene, On the clock thing, tap 2 to change the minutes, 3 to change the
seconds.

Rick  K2XT

From: elecraft-boun...@mailman.qth.net  on
behalf of Gene O 
Sent: Thursday, July 13, 2017 2:37:36 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Head phone/speaker question, time set

I have been off the air for about 10 months and just now trying to set up my
K3.  I have 2 Bose speakers wired to the K3, (stereo plug in the back of the
K3).  When I plug headphones into the front panel shouldn't the speakers
turn off? They stay on.

In the config menu I have the SPKR+PH option set to NO.  Also the SPKRS set
to 2.

What am I missing?

One other question.  The time is now 02.32.  The time shown on the K3 is
02.39.37.  I can change the 2 by turning the main VFO dial. How do I change
the the other numbers?

I am missing something here also.

Thanks, Gene
W2BXR
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Re: [Elecraft] Head phone/speaker question, time set

[Rick Stealey]

Gene, On the clock thing, tap 2 to change the minutes, 3 to change the seconds.

Rick  K2XT

From: elecraft-boun...@mailman.qth.net  on 
behalf of Gene O 
Sent: Thursday, July 13, 2017 2:37:36 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Head phone/speaker question, time set

I have been off the air for about 10 months and just now trying to set
up my K3.  I have 2 Bose speakers wired to the K3, (stereo plug in the
back of the K3).  When I plug headphones into the front panel shouldn't
the speakers turn off? They stay on.

In the config menu I have the SPKR+PH option set to NO.  Also the SPKRS
set to 2.

What am I missing?

One other question.  The time is now 02.32.  The time shown on the K3 is
02.39.37.  I can change the 2 by turning the main VFO dial. How do I
change the the other numbers?

I am missing something here also.

Thanks, Gene
W2BXR
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Re: [Elecraft] Using a KX2 with an SP3 external speaker ?

[Don Wilhelm]

Phil,

I use the West Mountain Radio COMspkr.  They are modestly priced stereo 
speakers and are "RF proof".  The stereo pair allows listening to both 
sides when Dual RX is turned on and you are operating SPLIT.


73,
Don W3FPR

On 7/13/2017 1:55 AM, Phil Hystad wrote:

So far, I have mostly used my KX2 with headphones but I just acquired the 
KXPA100 100-watt amplifier so will be using the KX2 plus KXPA100 for a backup 
base station.  And, I think I want to use an external speaker.  Preferably my  
Elecraft SP3.

I understand that the KX2 requires the Headphones output to be amplified for 
use with something like the SP3.  Has anyone built their own little audio amp 
or maybe just purchased one for using with the SP3?

Or, any other ideas would be welcome as well.

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Re: [Elecraft] Using a KX2 with an SP3 external speaker ?

[Dave AD6A]

Phil,

I use a little 7W mono amp from MCM electronics that gives plenty of punch
into a small comms speaker.
I've tried it with the SP3 also - works just fine. I also use one with my
KX3 on my 10/24GHz portable rig.

It's part number 809077 at MCM here
http://electronics.mcmelectronics.com/search?w=809077

73,Dave, AD6A

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad
Sent: Wednesday, July 12, 2017 10:56 PM
To: elecraft 
Subject: [Elecraft] Using a KX2 with an SP3 external speaker ?

So far, I have mostly used my KX2 with headphones but I just acquired the
KXPA100 100-watt amplifier so will be using the KX2 plus KXPA100 for a
backup base station.  And, I think I want to use an external speaker.
Preferably my  Elecraft SP3.

I understand that the KX2 requires the Headphones output to be amplified for
use with something like the SP3.  Has anyone built their own little audio
amp or maybe just purchased one for using with the SP3?

Or, any other ideas would be welcome as well.

73, phil, K7PEH

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