[Elecraft] K3S - High SWR on 6 Meters

[Bob McGraw]

Is the ATU in BYPASS or  AUTO mode?  A dit would cause it to resolve a 
match or recall a previous match.   If your 6M antenna has an SWR of 
1.5:1 or less, then the ATU should be in BYPASS mode for 6M.


With WSJT-X, is the Radio Setup menu set to Fake It or SPLIT? If SPLIT, 
then is VFO B on some random or frequency distant from VFO A?   I 
suggest setting the WSJT-X Setup to Fake it.


73

Bob, K4TAX


On 6/14/2022 7:46 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 6
Date: Tue, 14 Jun 2022 09:37:33 -0600
From: "N4ST - Jim"
To:,   
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters
Message-ID:<02b901d88004$aafe32c0$00fa9840$@n4st.com>
Content-Type: text/plain;   charset="us-ascii"

High SWR occurs immediately when using the FT8 Tune function on WSJT-X
It does not occur initially with a dummy load, however once the high SWR
state occurs, it persists when switching to a dummy load.
A CW dit will clear the high SWR state..

___
73,
Jim - N4ST


--
IF ONE EXPECTS COMPUTERS AND TECHNOLOGY TO SOLVE THEIR PROBLEMS,
ONE DOESN'T UNDERSTAND COMPUTERS AND TECHNOLOGY
AND ONE DOESN'T UNDERSTAND THEIR PROBLEMS."


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Re: [Elecraft] What is a reasonable turnover time to hear from Elecraft support:

[John Paul Keon]

As for the Elecraft Support Staff, I am very happy and a very
satisfied customer.

I emailed them several times and got replies within a reasonable amount of
time.

I sent my K3S in for repair and got it back in a short time.
They made the necessary repairs, and upgrades and it works better
than it did new.  Evidently when I built it I did not tighten down some
parts
and did not do some other things properly.
They sent it back calibrated and factory updated.

I also received several calls from Doug and he explained what happened
to the radio.  Some of the support techs also called.

Happy?  Yes!
Supportive? YES!

I know they were hung up for a while with the K4D production and the issues
they had in house.  After that cleared they took my RMS and got it done!

John Paul // AB4PP

On Tue, Jun 14, 2022 at 9:03 PM Bert  wrote:

> Don't assume the email has been received. Send the email again.
> Bert VE3NR
>
>
>
> On 2022-06-14 20:46, Dave (NK7Z) wrote:
> > I have had very good results with Elecraft Support!  Maybe a day or so
> > when I email them.
> >
> > 73, and thanks,
> > Dave (NK7Z)
> > https://www.nk7z.net
> > ARRL Volunteer Examiner
> > ARRL Technical Specialist, RFI
> > ARRL Asst. Director, NW Division, Technical Resources
> >
> > On 6/14/22 16:04, John Paul Keon wrote:
> >> I get answers in a day or two depending on the holidays and the
> >> weekends.
> >>
> >> No problem here.
> >>
> >> John Paul // AB4PP
> >>
> >> On Tue, Jun 14, 2022 at 6:13 PM Stephen Dubin via Elecraft <
> >> elecraft@mailman.qth.net> wrote:
> >>
> >>>   I sent an inquiry to Elecraft Support (my plaintiff "What to do
> >>> when'When
> >>> all else fails' fails:?" message) and * have not hear back.  I
> >>> wonder what,
> >>> under current conditions, is a reasonable time to wait for a
> >>> response or,
> >>> at least,  acknowledgement..  TNX FER  HELP!
> >>> VY 73 de W3UECSteve Dubindubinse@aol.com39.928995 N, -75.339629 W
> >>> __
> >>> Elecraft mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> >>> Message delivered to jpkeon...@gmail.com
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Re: [Elecraft] What is a reasonable turnover time to hear from Elecraft support:

[Bert]

Don't assume the email has been received. Send the email again.
Bert VE3NR



On 2022-06-14 20:46, Dave (NK7Z) wrote:
I have had very good results with Elecraft Support!  Maybe a day or so 
when I email them.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 6/14/22 16:04, John Paul Keon wrote:
I get answers in a day or two depending on the holidays and the 
weekends.


No problem here.

John Paul // AB4PP

On Tue, Jun 14, 2022 at 6:13 PM Stephen Dubin via Elecraft <
elecraft@mailman.qth.net> wrote:

  I sent an inquiry to Elecraft Support (my plaintiff "What to do 
when'When
all else fails' fails:?" message) and * have not hear back.  I 
wonder what,
under current conditions, is a reasonable time to wait for a 
response or,

at least,  acknowledgement..  TNX FER  HELP!
VY 73 de W3UECSteve Dubindubinse@aol.com39.928995 N, -75.339629 W
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Re: [Elecraft] What is a reasonable turnover time to hear from Elecraft support:

[Dave (NK7Z)]

I have had very good results with Elecraft Support!  Maybe a day or so 
when I email them.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 6/14/22 16:04, John Paul Keon wrote:

I get answers in a day or two depending on the holidays and the weekends.

No problem here.

John Paul // AB4PP

On Tue, Jun 14, 2022 at 6:13 PM Stephen Dubin via Elecraft <
elecraft@mailman.qth.net> wrote:


  I sent an inquiry to Elecraft Support (my plaintiff "What to do when'When
all else fails' fails:?" message) and * have not hear back.  I wonder what,
under current conditions, is a reasonable time to wait for a response or,
at least,  acknowledgement..  TNX FER  HELP!
VY 73 de W3UECSteve Dubindubinse@aol.com39.928995 N, -75.339629 W
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Re: [Elecraft] help with mailing list

[Greg Troxel]

Robert Strickland via Elecraft  writes:

> When I send an email to this list, the "from" field prints my name and
> "via Elecraft" together in the from/correspondents column. What am I
> doing to get the "via Elecraft" and what do I do to get rid of it so
> that just my name appears? I am using Thunderbird as a mail client on
> a W10-64 machine. Thanks in advance.

tl;dr: The world is broken and the only thing that you can do is to move
from yahoo to a provider whose addresses you see on the list without
this munging.

A few things come together:

 - Mailinglists resend messages, normally with the From: field
   unchanged.

 - As part of spamfighting, mail senders often add digital signatures
   (DKIM) so that recipients can tell a message was sent by the domain
   in From:

 - Mailinglists add subject tags and footers.  I view this as a bug
   because it breaks signatures, and delivers a message From: someone
   with content they didn't send -- but I'm odd, it's very common and
   many think this is ok.  (People can sort/filter on List-Id: header.)

 - Some domains publish a policy that says "if the messages fails DKIM
   and it didn't come from my servers, reject it."
   yahoo/aol/verizon.net (all the same thing now) is one of those
   domains.  This is called "DMARC reject" and fairly few places do it.

 - Therefore, messages to lists from DMARC reject places experience one of:

   * if there is no subject tag, no footer, and no From: munging: DKIM
 is intact and all is ok

   * if there is modification then the redistributed message fails DKIM
 and hence DMARC

   * If there is modification and the From: line is rewritten to be from
 the list, so that the original sender's domain is not looked up for
 DMARC rules, it is delivered.  But it is broken, because "reply"
 which should send a message to the sender, sends to the list,
 risking publishing private correspondence.

 - There is Authenticated Receive Chain which might be a way out, but it
   might just be too complicated.


So solutions are:

  - move your email to a provider which does not publish a DMARC reject
policy.  It's a good idea to move away from yahoo anyway, because
their inbound spam filtering is broken and unfixable, in my
experience (their customers could not get mail from me to land in
their INBOX despite trying pretty hard, and their support could
not/would not explain why).

  - configure mailinglists to 1) not add subject tags 2) not add footers
and 3) not do From: rewriting.

I recommend doing both, but both are easier said than done.

(As an addendum, the list blocks messages with OpenPGP signatures.)

73 de n1dam
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Re: [Elecraft] What is a reasonable turnover time to hear from Elecraft support:

[KJ7SOY]

I’ve had replies in two days and I’ve had replies in three weeks. It all 
depends on how busy they are, who’s in and out of the shop, and how swamped 
they are with emails. 

73
Adrian, KJ7SOY


> On Jun 14, 2022, at 4:06 PM, John Paul Keon  wrote:
> 
> I get answers in a day or two depending on the holidays and the weekends.
> 
> No problem here.
> 
> John Paul // AB4PP
> 
>> On Tue, Jun 14, 2022 at 6:13 PM Stephen Dubin via Elecraft <
>> > wrote:
>> 
>> I sent an inquiry to Elecraft Support (my plaintiff "What to do when'When
>> all else fails' fails:?" message) and * have not hear back.  I wonder what,
>> under current conditions, is a reasonable time to wait for a response or,
>> at least,  acknowledgement..  TNX FER  HELP!
>> VY 73 de W3UECSteve Dubindubinse@aol.com39.928995 N, -75.339629 W
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>> Message delivered to jpkeon...@gmail.com
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Re: [Elecraft] What is a reasonable turnover time to hear from Elecraft support:

[John Paul Keon]

I get answers in a day or two depending on the holidays and the weekends.

No problem here.

John Paul // AB4PP

On Tue, Jun 14, 2022 at 6:13 PM Stephen Dubin via Elecraft <
elecraft@mailman.qth.net> wrote:

>  I sent an inquiry to Elecraft Support (my plaintiff "What to do when'When
> all else fails' fails:?" message) and * have not hear back.  I wonder what,
> under current conditions, is a reasonable time to wait for a response or,
> at least,  acknowledgement..  TNX FER  HELP!
> VY 73 de W3UECSteve Dubindubinse@aol.com39.928995 N, -75.339629 W
> __
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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[Elecraft] What is a reasonable turnover time to hear from Elecraft support:

[Stephen Dubin via Elecraft]

 I sent an inquiry to Elecraft Support (my plaintiff "What to do when'When all 
else fails' fails:?" message) and * have not hear back.  I wonder what, under 
current conditions, is a reasonable time to wait for a response or, at least,  
acknowledgement..  TNX FER  HELP! 
VY 73 de W3UECSteve Dubindubinse@aol.com39.928995 N, -75.339629 W 
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Re: [Elecraft] help with mailing list

[Julia Tuttle]

For me, it depends on whether the message was also sent to me directly.
Your initial message included the "from Elecraft" notation since I received
it only through the mailing list, but your reply to me didn't include it
since you sent it to me and the mailing list.

I'm using Gmail, but if your email client works similarly, you should
generally see the notation only on messages where you haven't yet replied.

73,

Julie

On Tue, Jun 14, 2022, 16:06 Robert Strickland  wrote:

> Julia...
>
> If so, why doesn't everyone have similar notation?
>
> ...robert
>
> On 6/14/2022 19:56, Julia Tuttle wrote:
> > The list adds it, and you can't remove it.
> >
> > On Tue, Jun 14, 2022, 13:28 Robert Strickland via Elecraft
> > mailto:elecraft@mailman.qth.net>> wrote:
> >
> > When I send an email to this list, the "from" field prints my name
> and
> > "via Elecraft" together in the from/correspondents column. What am I
> > doing to get the "via Elecraft" and what do I do to get rid of it so
> > that just my name appears? I am using Thunderbird as a mail client
> on a
> > W10-64 machine. Thanks in advance.
> >
> > ..robert
> > --
> > Robert G Strickland, PhD ABPH - KE2WY
> > rc...@verizon.net.usa
> > Syracuse, New York, USA
> > __
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> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > 
> > Help: http://mailman.qth.net/mmfaq.htm
> > 
> > Post: mailto:Elecraft@mailman.qth.net  Elecraft@mailman.qth.net>
> >
> > This list hosted by: http://www.qsl.net 
> > Please help support this email list: http://www.qsl.net/donate.html
> > 
> > Message delivered to ju...@juliatuttle.net
> > 
> >
>
> --
> Robert G Strickland, PhD ABPH - KE2WY
> rc...@verizon.net.usa
> Syracuse, New York, USA
>
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Re: [Elecraft] help with mailing list

[Robert Strickland via Elecraft]

Julia...

If so, why doesn't everyone have similar notation?

...robert

On 6/14/2022 19:56, Julia Tuttle wrote:

The list adds it, and you can't remove it.

On Tue, Jun 14, 2022, 13:28 Robert Strickland via Elecraft 
mailto:elecraft@mailman.qth.net>> wrote:


When I send an email to this list, the "from" field prints my name and
"via Elecraft" together in the from/correspondents column. What am I
doing to get the "via Elecraft" and what do I do to get rid of it so
that just my name appears? I am using Thunderbird as a mail client on a
W10-64 machine. Thanks in advance.

..robert
-- 
Robert G Strickland, PhD ABPH - KE2WY

rc...@verizon.net.usa
Syracuse, New York, USA
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--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] help with mailing list

[Julia Tuttle]

The list adds it, and you can't remove it.

On Tue, Jun 14, 2022, 13:28 Robert Strickland via Elecraft <
elecraft@mailman.qth.net> wrote:

> When I send an email to this list, the "from" field prints my name and
> "via Elecraft" together in the from/correspondents column. What am I
> doing to get the "via Elecraft" and what do I do to get rid of it so
> that just my name appears? I am using Thunderbird as a mail client on a
> W10-64 machine. Thanks in advance.
>
> ...robert
> --
> Robert G Strickland, PhD ABPH - KE2WY
> rc...@verizon.net.usa
> Syracuse, New York, USA
> __
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Re: [Elecraft] KX3/KPA100/Powerwerx Revisited

[alan]

On mine, the fan comes on briefly when the power supply is first turned 
on and then turns off.  It comes back on again if it starts to get hot.  
I just confirmed that by transmitting 100W into a dummy load for 2 minutes.


Alan N1AL


On 6/13/22 23:31, Walter Underwood wrote:

Are the fans on those power supplies running? Both of those power supplies have 
fans on the back.

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


On Jun 12, 2022, at 12:51 PM, Jim Ruff via Elecraft  
wrote:

Thanks everyone for your quick responses.  So far, none of the suggested 
solutions have worked, so I hooked the KPA100 up to a different power supply, 
an Alinco DM-330MV, and I had the same whirling noise, only not quite as loud.

This leads me to believe that something in the KPA100 is causing some kind of 
line noise to the power supply.  Is there a fix for this?  If not, the noise 
doesn't really bother me, but is this noise affecting my signal when I TX?  
That is my real concern and I should have made that clearer in my first email.
Thanks,Jim W7JHR



Sent from Yahoo Mail. Get the app
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[Elecraft] help with mailing list

[Robert Strickland via Elecraft]

When I send an email to this list, the "from" field prints my name and 
"via Elecraft" together in the from/correspondents column. What am I 
doing to get the "via Elecraft" and what do I do to get rid of it so 
that just my name appears? I am using Thunderbird as a mail client on a 
W10-64 machine. Thanks in advance.


...robert
--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] KX3 and Heatsink

[Ed Cole]

I added a heat sink to my KX3 a few years ago since I use it with long 
"key-down" digital modes such as wsjt-x (primarily on 6m).


I obtained the heat sink from VE7FMN and it installed easily.  Later 
Elecraft came out with its version which I bought (but have not 
installed).  Being a thin metal plate didn't seem comparable in heat 
conduction to the die-cast aluminum unit with cooling fins.  I tried 
finding VE7FMN's product and domain name is not registered so guessing 
he quit making them.


My testing results: http://www.kl7uw.com/KX3.htm

73, Ed - KL7UW
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[Elecraft] test 2

[KE2WY via Elecraft]

test
--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] K3S - High SWR on 6 Meters ***SOLVED***

[N4ST - Jim]

That was it!
I was running the latest firmware version, but since I had the old PA module , 
inserting the 6dB of attenuation would not let me reach full power on 6M.
My "new" refurbished PA module was of the newer variety and required the 6dB of 
attenuation in order to avoid instabilities.
Putting my TenTec Eagle back in the closet. .

Thank You Elecraft support for supplying new LPA/PA modules and diagnosing my 
problem.

_
73,
Jim - N4ST

-Original Message-
From: Keith Trinity WE6R  
Sent: Tuesday, June 14, 2022 09:32
To: Elecraft@mailman.qth.net
Cc: hamsh...@n4st.com
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters

Jim;
Make sure you are updated to the latest 5.67 Firmware.
In the notes of the K3 Utility you will find this in the Help\K3 
Firmware Release Notes;
It is specific for 6m, it is -only- for the KPA3"A", and will fix any 
oscillation issues (which can manifest as High-SWR);
Keith WE6R Elecraft K3/K4 Tech

K3 MCU 5.67 / DSP 2.88 / FPF 1.26, 1-22-2019
* 6 M GAIN REDUCTION (FOR USE WITH KPA3A):
In some cases the KPA3A may have more gain than necessary on 6 meters. 
As a precaution, all radios using a KPA3A (instead of the older KPA3) 
should be configured to insert some attenuation. See instructions below. 
No hardware modifications are required.

INSTRUCTIONS:  [Do this only on a K3S, or a K3 that has a KPA3A installed.]
1. Select the 6 meter band.
2. Connect a dummy load rated at 50 W (or higher) to the transceiver.
3. Set the PWR control to 50 watts.
4. Place the ATU in bypass mode.
5. Locate the CONFIG:TUN PWR menu entry. Set the value to NOR using VFO A.
6. Locate the CONFIG:TXGN HP menu entry.
7. Tap the '8' switch (NR) once to add "ATN6" to the parameter display 
on VFO A.
 (Tapping it a second time would return to the original 
non-attenuated setting.)
8. Exit the menu.
9. Hold TUNE to do automatic power calibration on 6 meters at the 50 W 
level. After a few seconds, tap XMIT to terminate the TUNE operation.

NOTE: If you have difficulty reaching full power on 6 meters after 
making this change, it could be because your PA module is actually a 
KPA3, not a KPA3A. In this case, re-do the above procedure, changing the 
TXGN HP menu setting back to the original (i.e., without "ATN6" 
showing). (Max. power output at 50 MHz is specified at 100 W +/- 1 dB, 
typical. 1 dB below 100 W is approx. 90 W. See Specifications for max 
output at 51 MHz and higher.)


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Re: [Elecraft] K3S - High SWR on 6 Meters

[N4ST - Jim]

Thanks Jim,

It is a real puzzler.

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Jim Brown
Sent: Tuesday, June 14, 2022 02:28
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters

On 6/13/2022 11:05 PM, N4ST - Jim wrote:
> SWR is fine with CW, problem only occurs with FT8.  Same antenna, same
coax,
> same frequency.
> Only occurs on 6M.

I've seen guys trying to help asking questions for which I haven't seen 
answers. I'll try ONCE to help.

1. Describe the antenna. Where is it (with respect to the shack)?
5el Cushcraft located 55 feet from the shack.
2. As others have observed, the first thing to check in any system when 
something like this happens is to suspect EVERYTHING in the antenna 
system, ESPECIALLY ever piece of coax and every connection. That means 
getting serious to check that every connector is wrench tight, and to 
"rattle" all cables and connectors while watching for any changes.
By passed Daiwa antenna switch.  Swapped coax jumper cables.  
3. What WAS the SWR on CW? What was it on FT8?
1.1-1.2 SWR on CW.  Meter pegged +10 on FT8
4. What happens if you click on TUNE in the software you're using for FT8?
That is how I have done the FT8 testing.
5. What power did you use for each mode?
Have used 50W & 100W on CW.  8W, 10W & 50W on FT8
The FT8 SWR is fine at 8 watts, before K3S PA is engaged.  No good
at 10W when the PA kicks in.
6. Are any of your coax connectors, including adapters, junk? If they 
don't say Amphenol 83-1SP, or have a MIL spec number stamped on them, 
there a VERY good chance that they are JUNK. When I got back on the air 
in 2003, I filled my parts stash with all sorts of no-name adapters from 
ham vendors. Over the next 6-8 years, they caused me all sorts of grief. 
Flimsy construction, spring wire in elbow adapters, out of physical 
tolerance center conductors that don't mate well to form a solid 
contact. I had Tee adapters fall apart.
I may have some "junk" connectors.  DX Engineering crimp/solder
PL-259s.
Have swapped jumpers.  Bypassed antenna switch.  No observable
difference.
FWIW, my TenTec Eagle is perfectly happy with the 6M beam,  70W FT8,
1.2 SWR.
I suspect my "new" refurbished PA module from Elecraft has some
instability.

73, Jim K9YC

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Re: [Elecraft] K3S - High SWR on 6 Meters

[lists]

I had this happen when I got my KPA-1500 a few years ago. When using my old
IC-7000 it was fine, using 100W from my K3s was good but QRO, at any level,
and it went to heck. I was advised by several folks that the matching
network on my antenna (M-Squared 6M5) was known to be problematic at high
power. 

To rule everything else out I went with a straight run from the amp to the
antenna and the same thing was occurring. That's what prompted me to change
antennas. I bought a 6-el LFA from InnovAntennas two years ago and not a
hint of a worry ever since. 1400W all day on FT8 and other than the noise of
fan level 3, it's all good. 

Now with all that said, I'd definitely check your balun and feedline first
and foremost. 

 - pjd

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of N4ST - Jim
Sent: Tuesday, June 14, 2022 2:05 AM
To: 'Joe Subich, W4TV' ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters

SWR is fine with CW, problem only occurs with FT8.  Same antenna, same coax,
same frequency.
Only occurs on 6M.

___
73,
Jim - N4ST

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Joe Subich, W4TV
Sent: Monday, June 13, 2022 14:50
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters


 > Any advice?
 > A spur/oscillation in the KPA3A?
 > A relay stuck/not switching?

Are you sure there is no breakdown in your antenna, feedline or external
antenna switch?  Infinite SWR on the external meter would indicate an issue
beyond it.

Are you seeing the problem on any other band?  with any other antenna?

I recently went through a "High SWR" issue with my K3 that turned out to be
a bad coaxial jumper (between rig and switch that allows me to switch rigs)
even though the jumper does not test bad with an ohm meter (no shorts, opens
or intermittents as either connector is flexed or twisted).

73,

... Joe, W4TV


On 2022-06-13 4:07 PM, N4ST wrote:
> So, received a new KLPA3A & KPA3A from Elecraft in exchange for my old
ones
> plus $$.
> Installed the new KLPA3A & KPA3A and passed LP and HP TX Calibration.
> My 6M beam measures 1.06 SWR on analyzer.
> CW Key down, 100W, I get 1.2 on external SWR meter and 1 bar on K3S 
> SWR meter.
> With FT8 I'm OK for 1 or 2 transmits and then I get infinity on 
> external
SWR
> meter and full scale on K3S SWR meter, but full power out.
> If I switch to a dummy load, I get zero power out (fold back?) If I 
> operate FT8 at 8 watts with the beam, I get 1.2 on external SWR meter 
> and 1 bar on K3S SWR meter and 8 watts out.
> Going back to CW full power seems to perform a reset.  Everything 
> still
fine
> in CW, but now FT8 is OK for 1 or 2 transmits and then high SWR returns.
> 
> Any advice?
> A spur/oscillation in the KPA3A?
> A relay stuck/not switching?
> 
> My TenTec Eagle is carrying the load for me during these 6M openings.
> (46 states worked in last few weeks)
> 
> 
> ___
> 73,
> Jim - N4ST
> 


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Re: [Elecraft] K3S - High SWR on 6 Meters

[N4ST - Jim]

High SWR occurs immediately when using the FT8 Tune function on WSJT-X
It does not occur initially with a dummy load, however once the high SWR
state occurs, it persists when switching to a dummy load.
A CW dit will clear the high SWR state..

___ 
73,
Jim - N4ST


-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of j...@kk9a.com
Sent: Monday, June 13, 2022 20:42
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters

Does it do this if you transmit a long carrier into your antenna using the
tune button?  Can you transmit FT8 into a dummy load OK? 

John KK9A
   

N4ST wrote:

So, received a new KLPA3A & KPA3A from Elecraft in exchange for my old ones
plus $$.
Installed the new KLPA3A & KPA3A and passed LP and HP TX Calibration.
My 6M beam measures 1.06 SWR on analyzer.
CW Key down, 100W, I get 1.2 on external SWR meter and 1 bar on K3S SWR
meter.
With FT8 I'm OK for 1 or 2 transmits and then I get infinity on external SWR
meter and full scale on K3S SWR meter, but full power out.
If I switch to a dummy load, I get zero power out (fold back?)
If I operate FT8 at 8 watts with the beam, I get 1.2 on external SWR meter
and 1 bar on K3S SWR meter and 8 watts out.
Going back to CW full power seems to perform a reset.  Everything still fine
in CW, but now FT8 is OK for 1 or 2 transmits and then high SWR returns.

Any advice?
A spur/oscillation in the KPA3A?
A relay stuck/not switching?

My TenTec Eagle is carrying the load for me during these 6M openings.
(46 states worked in last few weeks)


___ 
73,
Jim - N4ST

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Re: [Elecraft] K3S - High SWR on 6 Meters

[Keith Trinity WE6R]

Jim;
Make sure you are updated to the latest 5.67 Firmware.
In the notes of the K3 Utility you will find this in the Help\K3 
Firmware Release Notes;
It is specific for 6m, it is -only- for the KPA3"A", and will fix any 
oscillation issues (which can manifest as High-SWR);

Keith WE6R Elecraft K3/K4 Tech

K3 MCU 5.67 / DSP 2.88 / FPF 1.26, 1-22-2019
* 6 M GAIN REDUCTION (FOR USE WITH KPA3A):
In some cases the KPA3A may have more gain than necessary on 6 meters. 
As a precaution, all radios using a KPA3A (instead of the older KPA3) 
should be configured to insert some attenuation. See instructions below. 
No hardware modifications are required.


INSTRUCTIONS:  [Do this only on a K3S, or a K3 that has a KPA3A installed.]
1. Select the 6 meter band.
2. Connect a dummy load rated at 50 W (or higher) to the transceiver.
3. Set the PWR control to 50 watts.
4. Place the ATU in bypass mode.
5. Locate the CONFIG:TUN PWR menu entry. Set the value to NOR using VFO A.
6. Locate the CONFIG:TXGN HP menu entry.
7. Tap the '8' switch (NR) once to add "ATN6" to the parameter display 
on VFO A.
    (Tapping it a second time would return to the original 
non-attenuated setting.)

8. Exit the menu.
9. Hold TUNE to do automatic power calibration on 6 meters at the 50 W 
level. After a few seconds, tap XMIT to terminate the TUNE operation.


NOTE: If you have difficulty reaching full power on 6 meters after 
making this change, it could be because your PA module is actually a 
KPA3, not a KPA3A. In this case, re-do the above procedure, changing the 
TXGN HP menu setting back to the original (i.e., without "ATN6" 
showing). (Max. power output at 50 MHz is specified at 100 W +/- 1 dB, 
typical. 1 dB below 100 W is approx. 90 W. See Specifications for max 
output at 51 MHz and higher.)


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Re: [Elecraft] KX3 and Heatsink

[Bill Lederer]

Thanks all for the replies.

I'll probably stick with the factory installed one, as I do have the 100
watt amp which I'll use if I need higher power.

Thanks,
w8lvn

On Tue, Jun 14, 2022 at 5:24 AM Rich WC3T  wrote:

> I have the latest revision stock heat sink and nary a thermal issue.
> Ever.
>
> 72,
> Rich Hurd / WC3T / DMR: 3142737
> Grid: FN20is
> Bureaucracy is always in search of self-preservation.  — AA7BQ
>
> > On Jun 13, 2022, at 22:47, Walter Underwood 
> wrote:
> >
> > Instructions are here. Doesn’t look difficult.
> >
> >
> https://ftp.elecraft.com/KX3/Mod%20Notes%20Alerts/E740254%20KX3HSMDKT%20Heat%20Sink%20Installation%20rev%20B.pdf
> <
> https://ftp.elecraft.com/KX3/Mod%20Notes%20Alerts/E740254%20KX3HSMDKT%20Heat%20Sink%20Installation%20rev%20B.pdf
> >
> >
> > wunder
> > K6WRU
> > Walter Underwood
> > CM87wj
> > http://observer.wunderwood.org/ (my blog)
> >
> >> On Jun 13, 2022, at 7:36 PM, Eric Norris 
> wrote:
> >>
> >> How difficult is it to install the later factory heatsink on an early
> KX3?
> >>
> >> 73 Eric WD6DBM
> >>
> >>> On Mon, Jun 13, 2022, 5:20 PM Don Wilhelm  wrote:
> >>>
> >>> Bill,
> >>>
> >>> If you run 12 watts on AM, FM and digital then the supplied heatsink
> >>> (assuming it is the newer heatsink the wraps around the bottom of the
> >>> KX3) then it should be adequate.
> >>> If you want to run the full 15 watts on those modes, I would suggest
> >>> adding the Pro Audio Engineering heatsink for additional cooling of
> the PA.
> >>>
> >>> Early versions of the heatsink had only a plate on the back which was
> >>> adequate for 12 watts on low duty cycle operation - Tx for 2 minutes
> and
> >>> then a RX period of about 3 minutes or more.
> >>>
> >>> The KX3 will protect itself by reducing power if it gets too hot.
> >>>
> >>> 73,
> >>> Don W3FPR
> >>> __
> >>> 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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> >>> Message delivered to norrislawfi...@gmail.com
> >>>
> >> __
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> >
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-- 
--w8lvn--
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[Elecraft] K30wanted

[Thaire Bryant]

I am looking for a K30, if you have one you would like to sell, please contact 
me.

TU es 73
Thaire. W2APF
w2...@arrl.net
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Re: [Elecraft] KX3 and Heatsink

[Rich WC3T]

I have the latest revision stock heat sink and nary a thermal issue. Ever.  

72,
Rich Hurd / WC3T / DMR: 3142737  
Grid: FN20is
Bureaucracy is always in search of self-preservation.  — AA7BQ

> On Jun 13, 2022, at 22:47, Walter Underwood  wrote:
> 
> Instructions are here. Doesn’t look difficult.
> 
> https://ftp.elecraft.com/KX3/Mod%20Notes%20Alerts/E740254%20KX3HSMDKT%20Heat%20Sink%20Installation%20rev%20B.pdf
>  
> 
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Jun 13, 2022, at 7:36 PM, Eric Norris  wrote:
>> 
>> How difficult is it to install the later factory heatsink on an early KX3?
>> 
>> 73 Eric WD6DBM
>> 
>>> On Mon, Jun 13, 2022, 5:20 PM Don Wilhelm  wrote:
>>> 
>>> Bill,
>>> 
>>> If you run 12 watts on AM, FM and digital then the supplied heatsink
>>> (assuming it is the newer heatsink the wraps around the bottom of the
>>> KX3) then it should be adequate.
>>> If you want to run the full 15 watts on those modes, I would suggest
>>> adding the Pro Audio Engineering heatsink for additional cooling of the PA.
>>> 
>>> Early versions of the heatsink had only a plate on the back which was
>>> adequate for 12 watts on low duty cycle operation - Tx for 2 minutes and
>>> then a RX period of about 3 minutes or more.
>>> 
>>> The KX3 will protect itself by reducing power if it gets too hot.
>>> 
>>> 73,
>>> Don W3FPR
>>> __
>>> 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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>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to norrislawfi...@gmail.com
>>> 
>> __
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Re: [Elecraft] K3S - High SWR on 6 Meters

[Jim Brown]

On 6/13/2022 11:05 PM, N4ST - Jim wrote:

SWR is fine with CW, problem only occurs with FT8.  Same antenna, same coax,
same frequency.
Only occurs on 6M.


I've seen guys trying to help asking questions for which I haven't seen 
answers. I'll try ONCE to help.


1. Describe the antenna. Where is it (with respect to the shack)?
2. As others have observed, the first thing to check in any system when 
something like this happens is to suspect EVERYTHING in the antenna 
system, ESPECIALLY ever piece of coax and every connection. That means 
getting serious to check that every connector is wrench tight, and to 
"rattle" all cables and connectors while watching for any changes.

3. What WAS the SWR on CW? What was it on FT8?
4. What happens if you click on TUNE in the software you're using for FT8?
5. What power did you use for each mode?
6. Are any of your coax connectors, including adapters, junk? If they 
don't say Amphenol 83-1SP, or have a MIL spec number stamped on them, 
there a VERY good chance that they are JUNK. When I got back on the air 
in 2003, I filled my parts stash with all sorts of no-name adapters from 
ham vendors. Over the next 6-8 years, they caused me all sorts of grief. 
Flimsy construction, spring wire in elbow adapters, out of physical 
tolerance center conductors that don't mate well to form a solid 
contact. I had Tee adapters fall apart.


73, Jim K9YC

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[Elecraft] test

[Robert Strickland via Elecraft]

test
--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] K3S - High SWR on 6 Meters

[N4ST - Jim]

It's a puzzler.
CW is fine.  Even 100W key down CW is fine, which I don't normally run on 6M.
Can't figure out why CW is OK, but FT8 "creates" high SWR.
Problem did not exist before replacing the LPA and PA.
__ 
73,
Jim - N4ST

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Mike Fatchett W0MU
Sent: Monday, June 13, 2022 15:02
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters

What is the 6m antenna, how far away is it from the xmitter? Sounds like 
an issue with a balun or matching overheating with the stress of FT8?

I would hook the K3 up directly to the 6m antenna or the dummy load.  
Something is certainly acting odd.

W0MU

On 6/13/2022 2:07 PM, N4ST wrote:
> So, received a new KLPA3A & KPA3A from Elecraft in exchange for my old ones
> plus $$.
> Installed the new KLPA3A & KPA3A and passed LP and HP TX Calibration.
> My 6M beam measures 1.06 SWR on analyzer.
> CW Key down, 100W, I get 1.2 on external SWR meter and 1 bar on K3S SWR
> meter.
> With FT8 I'm OK for 1 or 2 transmits and then I get infinity on external SWR
> meter and full scale on K3S SWR meter, but full power out.
> If I switch to a dummy load, I get zero power out (fold back?)
> If I operate FT8 at 8 watts with the beam, I get 1.2 on external SWR meter
> and 1 bar on K3S SWR meter and 8 watts out.
> Going back to CW full power seems to perform a reset.  Everything still fine
> in CW, but now FT8 is OK for 1 or 2 transmits and then high SWR returns.
>
> Any advice?
> A spur/oscillation in the KPA3A?
> A relay stuck/not switching?
>
> My TenTec Eagle is carrying the load for me during these 6M openings.
> (46 states worked in last few weeks)
>
>
> ___
> 73,
> Jim - N4ST
>
>
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Re: [Elecraft] K3S - High SWR on 6 Meters

[N4ST - Jim]

SWR is fine with CW, problem only occurs with FT8.  Same antenna, same coax,
same frequency.
Only occurs on 6M.

___ 
73,
Jim - N4ST

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Joe Subich, W4TV
Sent: Monday, June 13, 2022 14:50
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S - High SWR on 6 Meters


 > Any advice?
 > A spur/oscillation in the KPA3A?
 > A relay stuck/not switching?

Are you sure there is no breakdown in your antenna, feedline or
external antenna switch?  Infinite SWR on the external meter would
indicate an issue beyond it.

Are you seeing the problem on any other band?  with any other antenna?

I recently went through a "High SWR" issue with my K3 that turned out
to be a bad coaxial jumper (between rig and switch that allows me to
switch rigs) even though the jumper does not test bad with an ohm meter
(no shorts, opens or intermittents as either connector is flexed or
twisted).

73,

... Joe, W4TV


On 2022-06-13 4:07 PM, N4ST wrote:
> So, received a new KLPA3A & KPA3A from Elecraft in exchange for my old
ones
> plus $$.
> Installed the new KLPA3A & KPA3A and passed LP and HP TX Calibration.
> My 6M beam measures 1.06 SWR on analyzer.
> CW Key down, 100W, I get 1.2 on external SWR meter and 1 bar on K3S SWR
> meter.
> With FT8 I'm OK for 1 or 2 transmits and then I get infinity on external
SWR
> meter and full scale on K3S SWR meter, but full power out.
> If I switch to a dummy load, I get zero power out (fold back?)
> If I operate FT8 at 8 watts with the beam, I get 1.2 on external SWR meter
> and 1 bar on K3S SWR meter and 8 watts out.
> Going back to CW full power seems to perform a reset.  Everything still
fine
> in CW, but now FT8 is OK for 1 or 2 transmits and then high SWR returns.
> 
> Any advice?
> A spur/oscillation in the KPA3A?
> A relay stuck/not switching?
> 
> My TenTec Eagle is carrying the load for me during these 6M openings.
> (46 states worked in last few weeks)
> 
> 
> ___
> 73,
> Jim - N4ST
> 


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