[Elecraft] K3 goes deaf when set to 12W or more

[Bob McGraw]

Secondarily, this sounds like all of the station equipment was not 
properly bonded to a common point.  And, likely any outside ground was 
not bonded back to the AC Mains ground as specified by NEC.   Refer to 
the ARRL publication Station Grounding and Bonding by ARRL, Ward Silver.


Also see:  http://k9yc.com/GroundingAndAudio.pdf

73

Bob, K4TAX



On 9/16/2024 12:53 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 23
Date: Mon, 16 Sep 2024 10:45:07 -0400
From: Ken WA8JXM
To: Martin Schmiedel
Cc:elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 goes deaf when set to 12W or more
Message-ID:

Content-Type: text/plain; charset="UTF-8"

I had a similar problem years ago.  Apparently a not-close lightning bolt
damaged the tx protection.  Elecraft Tech Support was very good in the
diagnosis and suggested I could do the repair but my skills are from the
vacuum tube days so I sent it back to Elecraft for repair.

I suggest you contact Elecraft support.

Good luck,
Ken WA8JXM

--
Definition of an intellectual: 'Someone who has been educated beyond 
his/her intelligence'. Arthur C Clarke

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 goes deaf when set to 12W or more

[Keith Trinity WE6R]

Hi Martin;
1. It could be the relay on the KPAIO3 riser board, put it in RX and 
click above and below 12W over and over to get it to fail.
2. Look at the 4 big red coils on the KPA3A... check the legs very 
closely, they can break and still be touching due to the silicone.
3. Also on the newer KPA3"A", the 100ohm resistor next to the big 
electrolytic runs hot and the solder crystalizes, pry gently to see if 
it pops off.
It is either R19 or R5, depends of revision, replace with a 3W leaded 
standing on end (see pic below).

Keith WE6R
email me for pictures my first name at elecraft.com
Here are my notes;
Poor receive RX and NO TX above 12w watts, OK below 12W.

Most likely something on KPA3, like D7,8,9 or 10. Or broken leg on one 
of the big red coils.


Or; the relay on the KPAIO3 riser board. Or;
**On KPA3”A” , rev a thru C, check R5. On Rev D & E, check R19. On R5, 
the pads don’t fit the resistors and some earlier resistors only have 
solder on the underside at the very ends.


On both; this resistor runs hot and makes the solder underneath crystalline.

Correct part is E500486, 100 ohm 2w ,

HOWEVER, a better fix is;  (February 2021-all upgraded KPA3As)

Look for heated resistor and crystalline solder under pads, just gently 
pry it, it will pop off if bad;

R5 on Rev C and older,
R19 on rev D and E;
Fix: Remove surface mount 100 ohm, add E500118 100ohm 3 watt leaded as 
seen in picture.

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 goes deaf when set to 12W or more

[Mike Dodd]

On 9/16/2024 10:45 AM, Ken WA8JXM wrote:

I had a similar problem years ago.  Apparently a not-close lightning bolt
damaged the tx protection.  [...]  I sent it back to Elecraft for repair.


If I may jump in here A reminder that if you have ARRL equipment 
insurance, it will pay for the repair and shipping both ways.


I had a similar lightning issue with my K4 last year, and the insurance 
covered everything minus the $25 deductible.


73, Mike N4CF


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 goes deaf when set to 12W or more

[Ken WA8JXM]

I had a similar problem years ago.  Apparently a not-close lightning bolt
damaged the tx protection.  Elecraft Tech Support was very good in the
diagnosis and suggested I could do the repair but my skills are from the
vacuum tube days so I sent it back to Elecraft for repair.

I suggest you contact Elecraft support.

Good luck,
Ken WA8JXM

On Mon, Sep 16, 2024 at 9:34 AM Martin Schmiedel  wrote:

> Elecrafters,
>
> K3 #8862 ,  goes deaf when i set power to more than 12W . XMIT (TUNE)
> will not output power if TUN PWR is set to more than 12W.
>
> I hear a relay click ( KPA kicks in) when power setting transitions from
> 12W to 13W and rx is gone. It seems to work normal when PWR is less than
> 13W (aka the 10W PA is in use) .
>
>
> Where to look?
>
> Thanks.
>
> Martin, DM4iM
>
>
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 wa8...@gmail.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 goes deaf when set to 12W or more

[Martin Schmiedel]

Elecrafters,

K3 #8862 ,  goes deaf when i set power to more than 12W . XMIT (TUNE) 
will not output power if TUN PWR is set to more than 12W.


I hear a relay click ( KPA kicks in) when power setting transitions from 
12W to 13W and rx is gone. It seems to work normal when PWR is less than 
13W (aka the 10W PA is in use) .



Where to look?

Thanks.

Martin, DM4iM




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[Gary K9GS]

Ok...not familiar with your antenna but it sounds like you may have a RFI 
problem. What happens if you turn the transmitter power way down or off.  Do 
you still see the same behavior?73,Gary K9GS
 Original message From: Corky  Date: 
9/4/24  1:14 PM  (GMT-06:00) To: Gary K9GS  Subject: Re: 
[Elecraft] K3 Power Issues The antenna is a Cobra Jr. - basically a folded 
double Zepp.Thanks and 73,-Corky, AF4PMOn Sun, Sep 1, 2024, at 4:37 PM, Gary 
K9GS wrote:What antenna are you using?73,Gary K9GS Original message 
From: Corky  Date: 9/1/24  4:56 PM  (GMT-06:00) 
To: elecraft@mailman.qth.net Subject: [Elecraft] K3 Power Issues I was having 
trouble with my P3 going into brownout mode when transmitting 50 Watt digital. 
This used to be fine, but seems to have been getting worse over the past 
several months. When I monitored the power on the front panel of the K3 I found 
it was dropping about 1.5 V when transmitting digital signals. This would 
occasionally drop below 12 V and cause the P3 to go to brownout and shut down. 
I immediately assumed this was a problem with my distribution system and/or DC 
power cables, however, on further examination, that does not appear to be the 
case. The voltage at the distribution system shows no change in voltage when 
transmitting. I tried replacing the power cables from the distributions system 
and using alternate terminals with essentially no change in the behavior.Next I 
cleaned the terminals on the radio with de-oxit, and moved to AWG 10 wire for 
the power connection (I had been using AWG 14). I also shortened the power 
cable to 3 ft and used a separate power supply so that the radio is connected 
directly to the power supply. This improved the situation a bit, but the 
voltage still drops 0.6 to 0.9 V on TX (digital or key down CW).While I am now 
in the range that I no longer get P3 brownouts, this still seems excessive. At 
this point, it appears that the problem is somewhere at the K3 power connector 
or somewhere inside the radio. Has anyone else experienced this and if so are 
there any suggested resolutions or things to test. I know, especially since I 
am now using a separate supply I can increase the supply voltage to address the 
problem, but there is still a lot of heat/energy being wasted somewhere.Thanks 
and 73,-Corky, 
AF4PM__Elecraft 
mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: 
http://mailman.qth.net/mmfaq.htmPost: mailto:elecr...@mailman.qth.netThis list 
hosted by: http://www.qsl.netPlease help support this email list: 
http://www.qsl.net/donate.htmlMessage delivered to k...@gjschwartz.com 
__Elecraft mailing 
listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: 
http://mailman.qth.net/mmfaq.htmPost: mailto:elecr...@mailman.qth.netThis list 
hosted by: http://www.qsl.netPlease help support this email list: 
http://www.qsl.net/donate.htmlMessage delivered to af...@searlsnet.com 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[Jim Brown]

On 9/4/2024 1:49 PM, ken.k...@gmail.com wrote:

I'm not sure where the voltage displayed on the K3 is sampled, but I have
found it to be consistently about a volt lower than the voltage present at
the Power Pole connector on the back of the radio,


There is a protection diode in series with the positive terminal.

73, Jim K9YC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[Keith Trinity WE6R]

Corky;
1. You can shove some probes (needles or something) into the Anderson's 
to check the voltage at the back of the radio.
Or pop the lid and measure at the circuit breaker terminal, but beware, 
this is always HOT even with the radio turned off!
We recommend 1/2 volt or less drop at 100W TX. (I have 13.8 to 13.7 drop 
at my bench with 2ft of heavy Motorola two-way wire).
1.(b) Measure the voltage at the 12V RCA out jack, this is after the Q2 
switch on the RF board that also powers the whole radio (other than the 
KPA3).
The RCA jack does have one protection diode in series however, (D34), 
not sure the voltage drop of that device.
Compare this with the above, maybe the 12V out has an issue. I have seen 
protection diode D35 drag down the voltage (or worse).
It is acceptable to just remove D35 because if it shorts (or partial), 
it can cook Q2 and possibly destroy the RF board!! (the resetting fuse 
does not protect for this).


2. If your P3 has the SVGA option and you are powering it from the K3, 
make sure you have the 1.0 Amp upgrade if an older rig.


3. Also check your "ADC REF" voltage fine-tuning, that will make the 
internal measurements more accurate.


4. Disabling the automatic TX gain cal @ 1.0milliwatt, 5.0 and 50watts 
in FW has not been implemented.

Keith WE6R K3/K4 Tech

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Power Issues

[Bob McGraw]

Have you checked the 5.0 volt reference value In the CONFIG Menu at ADC 
REF?  See page 57 in the manual under CONFIG Menu for instructions.   
This will/can affect things like rigs supply voltage.


73

Bob, K4TAX

On 9/4/2024 3:49 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 22
Date: Wed, 4 Sep 2024 16:49:17 -0400
From:
To: "'Corky'", "'W3FPR'",
"'RIchard Williams via Elecraft'"
Subject: Re: [Elecraft] K3 Power Issues
Message-ID:<564301daff0b$e8d9c540$ba8d4fc0$@gmail.com>
Content-Type: text/plain;   charset="us-ascii"

I'm not sure where the voltage displayed on the K3 is sampled, but I have
found it to be consistently about a volt lower than the voltage present at
the Power Pole connector on the back of the radio, especially when in
transmit mode.  I have found this to be the case on both the K3 I use for
portable ops and my K3S in my home "shack".

Just FYI.

73,
Ken, KJ9B

--
Daddy said there would be days like this!
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[ken.kj9b]

I'm not sure where the voltage displayed on the K3 is sampled, but I have
found it to be consistently about a volt lower than the voltage present at
the Power Pole connector on the back of the radio, especially when in
transmit mode.  I have found this to be the case on both the K3 I use for
portable ops and my K3S in my home "shack".

Just FYI.

73,
Ken, KJ9B

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Corky
Sent: Wednesday, September 4, 2024 2:27 PM
To: W3FPR ; RIchard Williams via Elecraft

Subject: Re: [Elecraft] K3 Power Issues

Don, I am not sure exactly what "problems go away" means here.

Moving it to the separate power supply, cleaning the power terminal contacts
on the K3, and upgrading the power cable eliminated the brownout problem
with the K3. Increasing the voltage will certainly give me more headroom to
play with. 

As for measuring the power at the K3, the only thing I have to go on is the
reading from the K3 itself. Everything else I could come up with as a means
to measure the voltage at the terminals during TX involved adding something
else into the power chain, thereby increasing the resistance/voltage drop in
the power cable. If anyone has a solution for getting a voltage measurement
at the power terminals without adding in a jumper I would be appreciative.
Otherwise I guess I can see what the K3 says for voltage drop with and
without the jumper to see if there is a change.

Thanks and 73,
-Corky, AF4PM

On Sun, Sep 1, 2024, at 4:10 PM, W3FPR wrote:
> Corky,
> 
> If you can adjust the power supply output, set it to 14.3 volts and 
> see if the problems go away.
> Measure at the K3, not at the power supply.
> Eliminate your power distribution system and connect the K3/P3 direct 
> to the power supply.
> 
> Let us know if that helps.
> 
> 73,
> Don W3FPR
> 
> On 9/1/2024 5:55 PM, Corky wrote:
> > I was having trouble with my P3 going into brownout mode when
transmitting 50 Watt digital. This used to be fine, but seems to have been
getting worse over the past several months. When I monitored the power on
the front panel of the K3 I found it was dropping about 1.5 V when
transmitting digital signals. This would occasionally drop below 12 V and
cause the P3 to go to brownout and shut down.
> >
> >
> 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 ken.k...@gmail.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[Corky]

Don, I am not sure exactly what "problems go away" means here.

Moving it to the separate power supply, cleaning the power terminal contacts on 
the K3, and upgrading the power cable eliminated the brownout problem with the 
K3. Increasing the voltage will certainly give me more headroom to play with. 

As for measuring the power at the K3, the only thing I have to go on is the 
reading from the K3 itself. Everything else I could come up with as a means to 
measure the voltage at the terminals during TX involved adding something else 
into the power chain, thereby increasing the resistance/voltage drop in the 
power cable. If anyone has a solution for getting a voltage measurement at the 
power terminals without adding in a jumper I would be appreciative. Otherwise I 
guess I can see what the K3 says for voltage drop with and without the jumper 
to see if there is a change.

Thanks and 73,
-Corky, AF4PM

On Sun, Sep 1, 2024, at 4:10 PM, W3FPR wrote:
> Corky,
> 
> If you can adjust the power supply output, set it to 14.3 volts and see 
> if the problems go away.
> Measure at the K3, not at the power supply.
> Eliminate your power distribution system and connect the K3/P3 direct to 
> the power supply.
> 
> Let us know if that helps.
> 
> 73,
> Don W3FPR
> 
> On 9/1/2024 5:55 PM, Corky wrote:
> > I was having trouble with my P3 going into brownout mode when transmitting 
> > 50 Watt digital. This used to be fine, but seems to have been getting worse 
> > over the past several months. When I monitored the power on the front panel 
> > of the K3 I found it was dropping about 1.5 V when transmitting digital 
> > signals. This would occasionally drop below 12 V and cause the P3 to go to 
> > brownout and shut down.
> >
> >
> 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[Dave New, N8SBE]

Thanks for that reminder.  I haven't had my K3s on the air doing digital 
for quite a while, although I thought there was a firmware update that 
allowed me to shut off that automatic power calibration at 50W.  I 
remember it being discussed at one time, but I don't recall if it was 
ever released.


Most recently, I've been running FT8 with my KX2/KXPA100 combo when 
camping, and set the output power to 50W with no ill effects.
The KXPA100 PA temperature climbs up to about 56-57C and hovers there 
with the usual 2 x 12 second transmission every minute.  The KXPA100 
fault is triggered at 60C.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-09-02 03:35, Geert Jan de Groot via Elecraft wrote:
Also, for digital modes, I run my equipment at half power, max.  So, 
for

a 100W XCVR, I run it at 50W.


A gentle reminder that using exactly 50W, or exactly 5W, or exactly 
0.5mW (transverter) triggers the power calibration logic in the K3.


You are well advised to use 48W, or 52W, but not 50W.

Geert Jan
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[Geert Jan de Groot via Elecraft]

Also, for digital modes, I run my equipment at half power, max.  So, for
a 100W XCVR, I run it at 50W.


A gentle reminder that using exactly 50W, or exactly 5W, or exactly 
0.5mW (transverter) triggers the power calibration logic in the K3.


You are well advised to use 48W, or 52W, but not 50W.

Geert Jan
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[Alan]

The P3 should operate normally down to 8V or les.  I have successfully 
powered it from a 9V battery.


Alan N1AL


On 9/1/2024 2:55 PM, Corky wrote:

I was having trouble with my P3 going into brownout mode when transmitting 50 
Watt digital. This used to be fine, but seems to have been getting worse over 
the past several months. When I monitored the power on the front panel of the 
K3 I found it was dropping about 1.5 V when transmitting digital signals. This 
would occasionally drop below 12 V and cause the P3 to go to brownout and shut 
down.

I immediately assumed this was a problem with my distribution system and/or DC 
power cables, however, on further examination, that does not appear to be the 
case. The voltage at the distribution system shows no change in voltage when 
transmitting. I tried replacing the power cables from the distributions system 
and using alternate terminals with essentially no change in the behavior.

Next I cleaned the terminals on the radio with de-oxit, and moved to AWG 10 
wire for the power connection (I had been using AWG 14). I also shortened the 
power cable to 3 ft and used a separate power supply so that the radio is 
connected directly to the power supply. This improved the situation a bit, but 
the voltage still drops 0.6 to 0.9 V on TX (digital or key down CW).

While I am now in the range that I no longer get P3 brownouts, this still seems 
excessive. At this point, it appears that the problem is somewhere at the K3 
power connector or somewhere inside the radio. Has anyone else experienced this 
and if so are there any suggested resolutions or things to test. I know, 
especially since I am now using a separate supply I can increase the supply 
voltage to address the problem, but there is still a lot of heat/energy being 
wasted somewhere.

Thanks and 73,
-Corky, AF4PM

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[Gary K9GS]

What antenna are you using?73,Gary K9GS
 Original message From: Corky  Date: 
9/1/24  4:56 PM  (GMT-06:00) To: elecraft@mailman.qth.net Subject: [Elecraft] 
K3 Power Issues I was having trouble with my P3 going into brownout mode when 
transmitting 50 Watt digital. This used to be fine, but seems to have been 
getting worse over the past several months. When I monitored the power on the 
front panel of the K3 I found it was dropping about 1.5 V when transmitting 
digital signals. This would occasionally drop below 12 V and cause the P3 to go 
to brownout and shut down. I immediately assumed this was a problem with my 
distribution system and/or DC power cables, however, on further examination, 
that does not appear to be the case. The voltage at the distribution system 
shows no change in voltage when transmitting. I tried replacing the power 
cables from the distributions system and using alternate terminals with 
essentially no change in the behavior.Next I cleaned the terminals on the ra
 dio with de-oxit, and moved to AWG 10 wire for the power connection (I had 
been using AWG 14). I also shortened the power cable to 3 ft and used a 
separate power supply so that the radio is connected directly to the power 
supply. This improved the situation a bit, but the voltage still drops 0.6 to 
0.9 V on TX (digital or key down CW).While I am now in the range that I no 
longer get P3 brownouts, this still seems excessive. At this point, it appears 
that the problem is somewhere at the K3 power connector or somewhere inside the 
radio. Has anyone else experienced this and if so are there any suggested 
resolutions or things to test. I know, especially since I am now using a 
separate supply I can increase the supply voltage to address the problem, but 
there is still a lot of heat/energy being wasted somewhere.Thanks and 
73,-Corky, 
AF4PM__Elecraft 
mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: h
 ttp://mailman.qth.net/mmfaq.htmPost: mailto:elecr...@mailman.qth.netThis list 
hosted by: http://www.qsl.netPlease help support this email list: 
http://www.qsl.net/donate.htmlMessage delivered to k...@gjschwartz.com 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Power Issues

[W3FPR]

Corky,

If you can adjust the power supply output, set it to 14.3 volts and see 
if the problems go away.

Measure at the K3, not at the power supply.
Eliminate your power distribution system and connect the K3/P3 direct to 
the power supply.


Let us know if that helps.

73,
Don W3FPR

On 9/1/2024 5:55 PM, Corky wrote:

I was having trouble with my P3 going into brownout mode when transmitting 50 
Watt digital. This used to be fine, but seems to have been getting worse over 
the past several months. When I monitored the power on the front panel of the 
K3 I found it was dropping about 1.5 V when transmitting digital signals. This 
would occasionally drop below 12 V and cause the P3 to go to brownout and shut 
down.



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Power Issues

[Corky]

I was having trouble with my P3 going into brownout mode when transmitting 50 
Watt digital. This used to be fine, but seems to have been getting worse over 
the past several months. When I monitored the power on the front panel of the 
K3 I found it was dropping about 1.5 V when transmitting digital signals. This 
would occasionally drop below 12 V and cause the P3 to go to brownout and shut 
down. 

I immediately assumed this was a problem with my distribution system and/or DC 
power cables, however, on further examination, that does not appear to be the 
case. The voltage at the distribution system shows no change in voltage when 
transmitting. I tried replacing the power cables from the distributions system 
and using alternate terminals with essentially no change in the behavior.

Next I cleaned the terminals on the radio with de-oxit, and moved to AWG 10 
wire for the power connection (I had been using AWG 14). I also shortened the 
power cable to 3 ft and used a separate power supply so that the radio is 
connected directly to the power supply. This improved the situation a bit, but 
the voltage still drops 0.6 to 0.9 V on TX (digital or key down CW).

While I am now in the range that I no longer get P3 brownouts, this still seems 
excessive. At this point, it appears that the problem is somewhere at the K3 
power connector or somewhere inside the radio. Has anyone else experienced this 
and if so are there any suggested resolutions or things to test. I know, 
especially since I am now using a separate supply I can increase the supply 
voltage to address the problem, but there is still a lot of heat/energy being 
wasted somewhere.

Thanks and 73,
-Corky, AF4PM
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Shuts Down

[Bob McGraw]

I find running at reduced power may not indeed save anything.  It is 
just a "feel good issue" issue augmented by "old ham lore".


My K3S running 100 watts on 10M is 43% efficient.  That is 14.0 volts 
at 16.5 amps for 231 watts total DC input. While running 50 watts it 
is only 31% efficient.  That is 14.1 volts at 11.4 amps for 160 watts 
total DC input.   There is part of the power required for earlier 
stages.  These can likely be constant. However, the numbers show the 
radio dissipates 131 watts for 100 watts output while at 50 watts 
output it consumes 110 watts.  The difference in a 50 watt power 
reduction only nets a 21 watt reduction in dissipation.  Since the PA 
is protected by a circuit breaker, with some effort one could actually 
measure the PA efficiency and dissipation at various power levels.  
After doing so, one might be surprised, they aren't saving anything by 
operating at lower power but may find just the opposite to be true.


Further studies on my KPA500  indicate at certain reduced power 
levels, the dissipation exceeds that of those at higher power levels.  
Case and point from my measurements:  at 500 watts output, 40M the 
dissipation is 332.0 watts while at 250 watts output the dissipation 
is 357.2 watts.  Likewise on 20M at 500 watts output the dissipation 
is 368.0 watts while at 250 watts the dissipation is 404.0 watts.  My 
point being, reduced power even 20% may actually have higher heat 
dissipation than rated power output.


If the correct audio level is applied to the K3/K3S and adjusted as 
specified in the manual or in the Cady book, with the ALC indicator 
showing 4 bars solid and the 5th bar flickering, there is no danger of 
having a poor quality signal.    In other words, read the manual and 
do not rely on what "others" have said. Again, more incorrect "old ham 
lore".


73

Bob, K4TAX



On 9/1/2024 12:20 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 7
Date: Wed, 28 Aug 2024 10:12:45 -0400
From: "Dave New, N8SBE"
To: Elecraft Reflector
Subject: Re: [Elecraft] K3 shuts down
Message-ID:
Content-Type: text/plain; charset=UTF-8; format=flowed

Also, for digital modes, I run my equipment at half power, max. So, for
a 100W XCVR, I run it at 50W.

This serves two purposes.  One, it's easier on the PA, and two, it
leaves a 3dB 'overhead' for the digital mode, and less likelihood of
distortion getting into your TX signal.  This has been SOP for many
years for digital modes.

A difference of 1/2 S-unit on the receiving end will generally be
unnoticed, and your equipment will thank you, as well as any receiving
nodes that may not be able to decode your signal if you are pushing your
equipment to its limits.

73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018,
AmateurWire 1348

--
Daddy said there would be days like this!
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 shuts down

[Bob McGraw]

On many many occasions I have found DC Power Strips to be the fault of 
many issues.  Poor voltage regulation due to added resistance in the 
path is the primary one.  Yes, every connection and contact adds 
resistance.    For this reason, I've always practiced and written, one 
must connect the radio power leads direct to the power supply 
terminals.  DC Power Strips are good for low current applications but 
certainly NOT for the dynamic current demands of a radio.  This is 
regardless of the DC power strip current rating.  And if the DC Power 
Strip has individual fuses or switches, this makes it much worse.  Just 
more contact connections to add resistance to the current path.


73

Bob, K4TAX


On 9/1/2024 12:20 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 6
Date: Wed, 28 Aug 2024 12:24:48 +0100
From: G4GNX
To: Elecraft Reflector
Subject: Re: [Elecraft] K3 shuts down
Message-ID:<2cc39ed5-2461-4c6a-8bd9-ebc34bbfa...@g4gnx.com>
Content-Type: text/plain;   charset=utf-8

My K3S did this a couple of months ago - 40m SSB - 100W. I restarted it and it 
continued for nearly another month before switching off again. It did it a 
couple of times more over a week or so, before finally turning off and refusing 
to turn on again.

On investigation, I realised that I had ?temporarily? connected the K3S power 
cable to a distribution box, using PowerPoles - bad move. When tracing the 
cable routing, I pressed against one of the PowerPoles and the radio came back 
on again. I found it impossible to pull the PowerPoles apart, which was due to 
the plastic covers being badly distorted by heat. I eventually got round to 
pulling the PowerPoles apart by force and unfortunately the + connector flew in 
the air and I haven?t found it yet. ?

However, the contact in the dis-box looks suspiciously like it?s gotten hot and 
coupled with the other ?evidence? I conclude that the contacts deformed under 
heat caused by high current spikes (SSB).

Also, my IC-9700 (although connected to a different PSU - via PowerPoles) did 
the same thing, but unlike the K3S, it just rebooted itself.

I have completely rewired all of the high power cables in my shack directly 
back to the PSU (Sharman Multicom - 60A) and I?ve had no more problems.

In your case, you?re running 100W for longer periods and that is one possible 
cause of a premature breakdown. You could save yourself a lot of trouble, by 
examining all of the power connections, including the PowerPoles on the K3 
itself.

73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700

--
Daddy said there would be days like this!
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 SUB RX no audio

[gt-i--- via Elecraft]

Hello group,
since some days I experienced a malfunction with the SUB RX. When I
engage the SUB RX, there is no audio. I can hear the typical relay
clicks. A power cycle sometimes seemed to cure the issue, but IIRC there
were also occasion when this did not help.
Anybody had the same issue, any ideas?
73 mni tnx Gernot DF5RF
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[G4GNX]

You can buy me a coffee sometime. 🤣🤣

Glad you found the issue. It’s always comforting when it turns out not be the 
rig.

73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700



> On 28 Aug 2024, at 22:15, Glenn Thorne  wrote:
> 
> Problem solved.  It was the power cable.  Noticeable number of strands of
> the #12 wire were broken at the ring terminal end at the PS.  14.3 volts
> dropped to 11.5 on keydown at 100 W.  Replaced cable with #10 and now have
> 13.8 V on keydown.
> 
> Thanks for everyone's response.
> 
> 73, Glenn - KD0Q
> 
> On Tue, Aug 27, 2024 at 9:30 PM Glenn Thorne  wrote:
> 
>> Just tonight my K3 with KPA3 running 100 watts shuts down during digital
>> transmissions.  It appears that it happens after the PA temp is 47 C.
>> Maybe the first time it hits 48 C?
>> 
>> I checked the KPA3 FN1 - 4 settings and it appears that the fans work.
>> 
>> At what PA temps should the fans come on?  Increased speed?
>> 
>> Any ideas where to start troubleshooting will be appreciated.
>> 
>> Glenn - KD0Q

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[Glenn Thorne]

Problem solved.  It was the power cable.  Noticeable number of strands of
the #12 wire were broken at the ring terminal end at the PS.  14.3 volts
dropped to 11.5 on keydown at 100 W.  Replaced cable with #10 and now have
13.8 V on keydown.

Thanks for everyone's response.

73, Glenn - KD0Q

On Tue, Aug 27, 2024 at 9:30 PM Glenn Thorne  wrote:

> Just tonight my K3 with KPA3 running 100 watts shuts down during digital
> transmissions.  It appears that it happens after the PA temp is 47 C.
> Maybe the first time it hits 48 C?
>
> I checked the KPA3 FN1 - 4 settings and it appears that the fans work.
>
> At what PA temps should the fans come on?  Increased speed?
>
> Any ideas where to start troubleshooting will be appreciated.
>
> Glenn - KD0Q
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[Pete Smith N4ZR]

Sure.  I wouldn't have presumed otherwise.  However, there are many 
older rigs out there, from before digi modes were so popular, and not 
driving them into ALC is at least a good place to start if they don't 
apecify otherwise.


73, Pete N4ZR

On 8/28/2024 10:38 AM, Dave New, N8SBE wrote:

Pete,

That advice is good for Elecraft rigs, and of course fine for this 
email list.


I'd just caution readers that come across this to realize that their 
rig's manual will tell them where to set the ALC for digital modes.  
It does vary by rig manufacturer.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-08-28 10:21, Pete Smith N4ZR wrote:
I think many of us do this, but months ago I also started following 
advice on the WSJT reflector and made sure to set my audio so that 
the ALC indication peaked at 4 bars or just occasionally tickling the 
5th.  Said to clean up the FT8 signal.


73, Pete N4ZR

On 8/28/2024 10:12 AM, Dave New, N8SBE wrote:
Also, for digital modes, I run my equipment at half power, max.  So, 
for a 100W XCVR, I run it at 50W.


This serves two purposes.  One, it's easier on the PA, and two, it 
leaves a 3dB 'overhead' for the digital mode, and less likelihood of 
distortion getting into your TX signal.  This has been SOP for many 
years for digital modes.


A difference of 1/2 S-unit on the receiving end will generally be 
unnoticed, and your equipment will thank you, as well as any 
receiving nodes that may not be able to decode your signal if you 
are pushing your equipment to its limits.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-08-28 07:24, G4GNX wrote:
My K3S did this a couple of months ago - 40m SSB - 100W. I 
restarted it and it continued for nearly another month before 
switching off again. It did it a couple of times more over a week 
or so, before finally turning off and refusing to turn on again.


On investigation, I realised that I had “temporarily” connected the 
K3S power cable to a distribution box, using PowerPoles - bad move. 
When tracing the cable routing, I pressed against one of the 
PowerPoles and the radio came back on again. I found it impossible 
to pull the PowerPoles apart, which was due to the plastic covers 
being badly distorted by heat. I eventually got round to pulling 
the PowerPoles apart by force and unfortunately the + connector 
flew in the air and I haven’t found it yet. 😀


However, the contact in the dis-box looks suspiciously like it’s 
gotten hot and coupled with the other “evidence” I conclude that 
the contacts deformed under heat caused by high current spikes (SSB).


Also, my IC-9700 (although connected to a different PSU - via 
PowerPoles) did the same thing, but unlike the K3S, it just 
rebooted itself.


I have completely rewired all of the high power cables in my shack 
directly back to the PSU (Sharman Multicom - 60A) and I’ve had no 
more problems.


In your case, you’re running 100W for longer periods and that is 
one possible cause of a premature breakdown. You could save 
yourself a lot of trouble, by examining all of the power 
connections, including the PowerPoles on the K3 itself.


73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700





On 28 Aug 2024, at 03:30, Glenn Thorne  wrote:

Just tonight my K3 with KPA3 running 100 watts shuts down during 
digital

transmissions.  It appears that it happens after the PA temp is 47 C.
Maybe the first time it hits 48 C?

I checked the KPA3 FN1 - 4 settings and it appears that the fans 
work.


At what PA temps should the fans come on?  Increased speed?

Any ideas where to start troubleshooting will be appreciated.

Glenn - KD0Q



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 pete.n...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.n

Re: [Elecraft] K3 shuts down

[Dave New, N8SBE]

Pete,

That advice is good for Elecraft rigs, and of course fine for this email 
list.


I'd just caution readers that come across this to realize that their 
rig's manual will tell them where to set the ALC for digital modes.  It 
does vary by rig manufacturer.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-08-28 10:21, Pete Smith N4ZR wrote:
I think many of us do this, but months ago I also started following 
advice on the WSJT reflector and made sure to set my audio so that the 
ALC indication peaked at 4 bars or just occasionally tickling the 5th.  
Said to clean up the FT8 signal.


73, Pete N4ZR

On 8/28/2024 10:12 AM, Dave New, N8SBE wrote:
Also, for digital modes, I run my equipment at half power, max.  So, 
for a 100W XCVR, I run it at 50W.


This serves two purposes.  One, it's easier on the PA, and two, it 
leaves a 3dB 'overhead' for the digital mode, and less likelihood of 
distortion getting into your TX signal.  This has been SOP for many 
years for digital modes.


A difference of 1/2 S-unit on the receiving end will generally be 
unnoticed, and your equipment will thank you, as well as any receiving 
nodes that may not be able to decode your signal if you are pushing 
your equipment to its limits.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-08-28 07:24, G4GNX wrote:
My K3S did this a couple of months ago - 40m SSB - 100W. I restarted 
it and it continued for nearly another month before switching off 
again. It did it a couple of times more over a week or so, before 
finally turning off and refusing to turn on again.


On investigation, I realised that I had “temporarily” connected the 
K3S power cable to a distribution box, using PowerPoles - bad move. 
When tracing the cable routing, I pressed against one of the 
PowerPoles and the radio came back on again. I found it impossible to 
pull the PowerPoles apart, which was due to the plastic covers being 
badly distorted by heat. I eventually got round to pulling the 
PowerPoles apart by force and unfortunately the + connector flew in 
the air and I haven’t found it yet. 😀


However, the contact in the dis-box looks suspiciously like it’s 
gotten hot and coupled with the other “evidence” I conclude that the 
contacts deformed under heat caused by high current spikes (SSB).


Also, my IC-9700 (although connected to a different PSU - via 
PowerPoles) did the same thing, but unlike the K3S, it just rebooted 
itself.


I have completely rewired all of the high power cables in my shack 
directly back to the PSU (Sharman Multicom - 60A) and I’ve had no 
more problems.


In your case, you’re running 100W for longer periods and that is one 
possible cause of a premature breakdown. You could save yourself a 
lot of trouble, by examining all of the power connections, including 
the PowerPoles on the K3 itself.


73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700





On 28 Aug 2024, at 03:30, Glenn Thorne  wrote:

Just tonight my K3 with KPA3 running 100 watts shuts down during 
digital
transmissions.  It appears that it happens after the PA temp is 47 
C.

Maybe the first time it hits 48 C?

I checked the KPA3 FN1 - 4 settings and it appears that the fans 
work.


At what PA temps should the fans come on?  Increased speed?

Any ideas where to start troubleshooting will be appreciated.

Glenn - KD0Q



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 pete.n...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[Pete Smith N4ZR]

I think many of us do this, but months ago I also started following 
advice on the WSJT reflector and made sure to set my audio so that the 
ALC indication peaked at 4 bars or just occasionally tickling the 5th.  
Said to clean up the FT8 signal.


73, Pete N4ZR

On 8/28/2024 10:12 AM, Dave New, N8SBE wrote:
Also, for digital modes, I run my equipment at half power, max.  So, 
for a 100W XCVR, I run it at 50W.


This serves two purposes.  One, it's easier on the PA, and two, it 
leaves a 3dB 'overhead' for the digital mode, and less likelihood of 
distortion getting into your TX signal.  This has been SOP for many 
years for digital modes.


A difference of 1/2 S-unit on the receiving end will generally be 
unnoticed, and your equipment will thank you, as well as any receiving 
nodes that may not be able to decode your signal if you are pushing 
your equipment to its limits.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-08-28 07:24, G4GNX wrote:
My K3S did this a couple of months ago - 40m SSB - 100W. I restarted 
it and it continued for nearly another month before switching off 
again. It did it a couple of times more over a week or so, before 
finally turning off and refusing to turn on again.


On investigation, I realised that I had “temporarily” connected the 
K3S power cable to a distribution box, using PowerPoles - bad move. 
When tracing the cable routing, I pressed against one of the 
PowerPoles and the radio came back on again. I found it impossible to 
pull the PowerPoles apart, which was due to the plastic covers being 
badly distorted by heat. I eventually got round to pulling the 
PowerPoles apart by force and unfortunately the + connector flew in 
the air and I haven’t found it yet. 😀


However, the contact in the dis-box looks suspiciously like it’s 
gotten hot and coupled with the other “evidence” I conclude that the 
contacts deformed under heat caused by high current spikes (SSB).


Also, my IC-9700 (although connected to a different PSU - via 
PowerPoles) did the same thing, but unlike the K3S, it just rebooted 
itself.


I have completely rewired all of the high power cables in my shack 
directly back to the PSU (Sharman Multicom - 60A) and I’ve had no 
more problems.


In your case, you’re running 100W for longer periods and that is one 
possible cause of a premature breakdown. You could save yourself a 
lot of trouble, by examining all of the power connections, including 
the PowerPoles on the K3 itself.


73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700





On 28 Aug 2024, at 03:30, Glenn Thorne  wrote:

Just tonight my K3 with KPA3 running 100 watts shuts down during 
digital

transmissions.  It appears that it happens after the PA temp is 47 C.
Maybe the first time it hits 48 C?

I checked the KPA3 FN1 - 4 settings and it appears that the fans work.

At what PA temps should the fans come on?  Increased speed?

Any ideas where to start troubleshooting will be appreciated.

Glenn - KD0Q



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 pete.n...@gmail.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[Dave New, N8SBE]

Also, for digital modes, I run my equipment at half power, max.  So, for 
a 100W XCVR, I run it at 50W.


This serves two purposes.  One, it's easier on the PA, and two, it 
leaves a 3dB 'overhead' for the digital mode, and less likelihood of 
distortion getting into your TX signal.  This has been SOP for many 
years for digital modes.


A difference of 1/2 S-unit on the receiving end will generally be 
unnoticed, and your equipment will thank you, as well as any receiving 
nodes that may not be able to decode your signal if you are pushing your 
equipment to its limits.


73,

-- Dave, N8SBE, Hamshack Hotline 590-0971, HamsOverIP 101018, 
AmateurWire 1348


On 2024-08-28 07:24, G4GNX wrote:
My K3S did this a couple of months ago - 40m SSB - 100W. I restarted it 
and it continued for nearly another month before switching off again. 
It did it a couple of times more over a week or so, before finally 
turning off and refusing to turn on again.


On investigation, I realised that I had “temporarily” connected the K3S 
power cable to a distribution box, using PowerPoles - bad move. When 
tracing the cable routing, I pressed against one of the PowerPoles and 
the radio came back on again. I found it impossible to pull the 
PowerPoles apart, which was due to the plastic covers being badly 
distorted by heat. I eventually got round to pulling the PowerPoles 
apart by force and unfortunately the + connector flew in the air and I 
haven’t found it yet. 😀


However, the contact in the dis-box looks suspiciously like it’s gotten 
hot and coupled with the other “evidence” I conclude that the contacts 
deformed under heat caused by high current spikes (SSB).


Also, my IC-9700 (although connected to a different PSU - via 
PowerPoles) did the same thing, but unlike the K3S, it just rebooted 
itself.


I have completely rewired all of the high power cables in my shack 
directly back to the PSU (Sharman Multicom - 60A) and I’ve had no more 
problems.


In your case, you’re running 100W for longer periods and that is one 
possible cause of a premature breakdown. You could save yourself a lot 
of trouble, by examining all of the power connections, including the 
PowerPoles on the K3 itself.


73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700





On 28 Aug 2024, at 03:30, Glenn Thorne  wrote:

Just tonight my K3 with KPA3 running 100 watts shuts down during 
digital

transmissions.  It appears that it happens after the PA temp is 47 C.
Maybe the first time it hits 48 C?

I checked the KPA3 FN1 - 4 settings and it appears that the fans work.

At what PA temps should the fans come on?  Increased speed?

Any ideas where to start troubleshooting will be appreciated.

Glenn - KD0Q



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 n8...@densbe.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 shuts down

[G4GNX]

My K3S did this a couple of months ago - 40m SSB - 100W. I restarted it and it 
continued for nearly another month before switching off again. It did it a 
couple of times more over a week or so, before finally turning off and refusing 
to turn on again.

On investigation, I realised that I had “temporarily” connected the K3S power 
cable to a distribution box, using PowerPoles - bad move. When tracing the 
cable routing, I pressed against one of the PowerPoles and the radio came back 
on again. I found it impossible to pull the PowerPoles apart, which was due to 
the plastic covers being badly distorted by heat. I eventually got round to 
pulling the PowerPoles apart by force and unfortunately the + connector flew in 
the air and I haven’t found it yet. 😀

However, the contact in the dis-box looks suspiciously like it’s gotten hot and 
coupled with the other “evidence” I conclude that the contacts deformed under 
heat caused by high current spikes (SSB).

Also, my IC-9700 (although connected to a different PSU - via PowerPoles) did 
the same thing, but unlike the K3S, it just rebooted itself.

I have completely rewired all of the high power cables in my shack directly 
back to the PSU (Sharman Multicom - 60A) and I’ve had no more problems.

In your case, you’re running 100W for longer periods and that is one possible 
cause of a premature breakdown. You could save yourself a lot of trouble, by 
examining all of the power connections, including the PowerPoles on the K3 
itself.

73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700




> On 28 Aug 2024, at 03:30, Glenn Thorne  wrote:
> 
> Just tonight my K3 with KPA3 running 100 watts shuts down during digital
> transmissions.  It appears that it happens after the PA temp is 47 C.
> Maybe the first time it hits 48 C?
> 
> I checked the KPA3 FN1 - 4 settings and it appears that the fans work.
> 
> At what PA temps should the fans come on?  Increased speed?
> 
> Any ideas where to start troubleshooting will be appreciated.
> 
> Glenn - KD0Q


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 shuts down

[Glenn Thorne]

Just tonight my K3 with KPA3 running 100 watts shuts down during digital
transmissions.  It appears that it happens after the PA temp is 47 C.
Maybe the first time it hits 48 C?

I checked the KPA3 FN1 - 4 settings and it appears that the fans work.

At what PA temps should the fans come on?  Increased speed?

Any ideas where to start troubleshooting will be appreciated.

Glenn - KD0Q
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 not making power

[Michael Carter via Elecraft]

Hi Jim,

Is the low TX power present on all bands?

Even though it may be fruitless, try the
TX Gain calibration routine using the
K3 Utility and a good dummy load.  If
you're doing the TX Gain cal manually,
be sure to set the internal ATU (KAT3/3A)
in 'BYPASS' before doing the calibration.

The presence of low TX power when only
the LPA module is engaged when zero
power emanates after advancing the
TX Power control beyond 11 watts is
worrisome.

Have you had any nearby lightning
storms while the radio was connected
to an antenna?

Does the externally measured TX power
decrease to less than 3 watts if you
rotate the POWER control below that
level, or is it stuck at 3 watts over the
full range of the control (up to the 11 watt
transition point)?

73,
Mike, K8CN
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 not making power

[Jim Spaulding]

Just started this morning. Only 3 watts with power set at 11W, no
power with power level set for the KPA3.  KP3 is set to normal.
Am I missing something simple or is this a major problem.

73 Jim W0UO
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3: Intermittent problem with line out

[Jim Brown]

On 8/7/2024 8:15 AM, Peter Drexel wrote:

Any suggestions?


99.99% of RCA cables are crap, sold to the hi-fi world. Common problems 
are tiny conductors, "shield" is a wire, not a shield, connectors are 
cheap, out of spec, dissimilar metals, etc. Center pin may be too small 
to make contact, etc.


73, Jim K9YC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3: Intermittent problem with line out

[Peter Drexel]

 My K3, serial 3701, has an intermittent problem with output from Line
Out.  Sometimes it works and sometimes it doesn't.  I've tried swapping
cables and checked settings.  No joy.

I am using the radio with wsjt-x.   The wsjt-x setup works OK with a
different radio.

Any suggestions?

73 de Peter, AE1T
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/0 Mini

[Hank Blackwood via Elecraft]

I’m also interested in purchasing one. 

Hank
K4HYJ 

> On Jul 18, 2024, at 10:45 AM, Walter Crauwels ON4BCB  wrote:
> 
> Any Idea when the K3/0 mini is back available ? i heard there will be a new
> batch with preorder
> 
> any info on that ?
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 h...@optilink.us

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/0 Mini

[Walter Crauwels ON4BCB]

Any Idea when the K3/0 mini is back available ? i heard there will be a new
batch with preorder

any info on that ?
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/0 mini

[Walter Crauwels ON4BCB]

Any news on preorder and price for the new batch  K3/0 mini   ?
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] Elecraft K3 and P3

[Ed Parish]

 Well, I don't click on obfuscated links with no explanations.  He could
have easily put the text from some pdf doc into the email instead.

On Thu, Jun 20, 2024 at 3:14 PM  wrote:

> All the preliminary stuff starting with the icloud URL is icloud
> "protecting" you from opening what could be a suspect URL.  Although in
> this
> case, if you look at the end of all that, you will see "IMG_0716.pdf".
> That
> is a PDF of what is in the package for sale.
>
> 73,
> Ken, KJ9B
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> On
> Behalf Of Ed Parish
> Sent: Thursday, June 20, 2024 2:19 PM
> To: Dan Littel 
> Cc: Elecraft Mailing List 
> Subject: Re: [Elecraft] Elecraft K3 and P3
>
> What is this?
>
> On Tue, Jun 18, 2024, 12:07 Dan Littel  wrote:
>
> >
> > Attachment available until Jul 18, 2024 Click to Download  <
> > https://www.icloud.com/attachment/?u=https%3A%2F%2Fcvws.icloud-content
> > .com%2FB%2FAT_Z1dHE4GVNSVSgJ0AotMBGf4ZhAQKCLbPjR_INRRA1hIS0WwcJ_OVz%2F
> > %24%7Bf%7D%3Fo%3DAiu-KiMVO3qLl6BALEc7e53979WyusXEwuirkBIY2Zbk%26v%3D1%
> > 26x%3D3%26a%3DCAogIeLSjPwAs-12bUr4_eItJ5or7HUj66UovmUWIqibSgkSehCR4OTg
> > gjIYkfDftIwyIgEAKgkC6AMA_0zl7WVSBEZ_hmFaBAn85XNqJ2ufxJeh15UT3TgTOhTUbV
> > p-MWe3sVtVFmR6LE_HM0nRl1B9rTmagHInZoga4J7OKslcXSr18C2w9c4yRgskeVr2HYes
> > QlKAXodB2R-Dta7w%26e%3D1721318766%26fl%3D%26r%3DB5C44C10-F3C2-4B37-B7C
> > 4-C1D25FC535C1-1%26k%3D%24%7Buk%7D%26ckc%3Dcom.apple.largeattachment%2
> > 6ckz%3D6338C022-26BC-47FB-8770-957F459AFB24%26p%3D33%26s%3DoyPpqUaxa0x
> > O1hoC2nzV9SgjMB4&uk=J309B-p3DAWV3sV5ZxXx9A&f=IMG_0716.pdf&sz=26513679
> > >IMG_0716.pdf
> > 26.5 MB
> >
> > __
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto: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
> > k1ep.l...@gmail.com
> >
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 ken.k...@gmail.com
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 k1ep.l...@gmail.com
>


-- 
Ed Parish, K1EP
k...@arrl.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] Elecraft K3 and P3

[ken.kj9b]

All the preliminary stuff starting with the icloud URL is icloud
"protecting" you from opening what could be a suspect URL.  Although in this
case, if you look at the end of all that, you will see "IMG_0716.pdf".  That
is a PDF of what is in the package for sale.

73,
Ken, KJ9B

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Ed Parish
Sent: Thursday, June 20, 2024 2:19 PM
To: Dan Littel 
Cc: Elecraft Mailing List 
Subject: Re: [Elecraft] Elecraft K3 and P3

What is this?

On Tue, Jun 18, 2024, 12:07 Dan Littel  wrote:

>
> Attachment available until Jul 18, 2024 Click to Download  <
> https://www.icloud.com/attachment/?u=https%3A%2F%2Fcvws.icloud-content
> .com%2FB%2FAT_Z1dHE4GVNSVSgJ0AotMBGf4ZhAQKCLbPjR_INRRA1hIS0WwcJ_OVz%2F
> %24%7Bf%7D%3Fo%3DAiu-KiMVO3qLl6BALEc7e53979WyusXEwuirkBIY2Zbk%26v%3D1%
> 26x%3D3%26a%3DCAogIeLSjPwAs-12bUr4_eItJ5or7HUj66UovmUWIqibSgkSehCR4OTg
> gjIYkfDftIwyIgEAKgkC6AMA_0zl7WVSBEZ_hmFaBAn85XNqJ2ufxJeh15UT3TgTOhTUbV
> p-MWe3sVtVFmR6LE_HM0nRl1B9rTmagHInZoga4J7OKslcXSr18C2w9c4yRgskeVr2HYes
> QlKAXodB2R-Dta7w%26e%3D1721318766%26fl%3D%26r%3DB5C44C10-F3C2-4B37-B7C
> 4-C1D25FC535C1-1%26k%3D%24%7Buk%7D%26ckc%3Dcom.apple.largeattachment%2
> 6ckz%3D6338C022-26BC-47FB-8770-957F459AFB24%26p%3D33%26s%3DoyPpqUaxa0x
> O1hoC2nzV9SgjMB4&uk=J309B-p3DAWV3sV5ZxXx9A&f=IMG_0716.pdf&sz=26513679
> >IMG_0716.pdf
> 26.5 MB
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 
> k1ep.l...@gmail.com
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 ken.k...@gmail.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] Elecraft K3 and P3

[Ed Parish]

What is this?

On Tue, Jun 18, 2024, 12:07 Dan Littel  wrote:

>
> Attachment available until Jul 18, 2024
> Click to Download
>  <
> https://www.icloud.com/attachment/?u=https%3A%2F%2Fcvws.icloud-content.com%2FB%2FAT_Z1dHE4GVNSVSgJ0AotMBGf4ZhAQKCLbPjR_INRRA1hIS0WwcJ_OVz%2F%24%7Bf%7D%3Fo%3DAiu-KiMVO3qLl6BALEc7e53979WyusXEwuirkBIY2Zbk%26v%3D1%26x%3D3%26a%3DCAogIeLSjPwAs-12bUr4_eItJ5or7HUj66UovmUWIqibSgkSehCR4OTggjIYkfDftIwyIgEAKgkC6AMA_0zl7WVSBEZ_hmFaBAn85XNqJ2ufxJeh15UT3TgTOhTUbVp-MWe3sVtVFmR6LE_HM0nRl1B9rTmagHInZoga4J7OKslcXSr18C2w9c4yRgskeVr2HYesQlKAXodB2R-Dta7w%26e%3D1721318766%26fl%3D%26r%3DB5C44C10-F3C2-4B37-B7C4-C1D25FC535C1-1%26k%3D%24%7Buk%7D%26ckc%3Dcom.apple.largeattachment%26ckz%3D6338C022-26BC-47FB-8770-957F459AFB24%26p%3D33%26s%3DoyPpqUaxa0xO1hoC2nzV9SgjMB4&uk=J309B-p3DAWV3sV5ZxXx9A&f=IMG_0716.pdf&sz=26513679
> >IMG_0716.pdf
> 26.5 MB
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 k1ep.l...@gmail.com
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] Elecraft K3 and P3

[Dan Littel]

Attachment available until Jul 18, 2024
Click to Download
 
IMG_0716.pdf
26.5 MB

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 for sale on QTH

[H.R. Freeman]

Hi all,

The K3 has been sold.

Thanks

Harry NK9R

On 6/12/2024 12:02 PM, H.R. Freeman wrote:

Hi;

I just acquired a fully optioned K3s and need to sell my back-up/field 
day K3.


I not a hoarder, well not much anyway. Two K3's, and a KX3 are enough.

K3 # 1543 fully updated mods, documented, with options. Clean and ready

Please see details on QTH.com

Thanks

Harry NK9R

Marietta, GA
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 rf...@bellsouth.net 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 for sale on QTH

[H.R. Freeman]

Hi;

I just acquired a fully optioned K3s and need to sell my back-up/field 
day K3.


I not a hoarder, well not much anyway. Two K3's, and a KX3 are enough.

K3 # 1543 fully updated mods, documented, with options. Clean and ready

Please see details on QTH.com

Thanks

Harry NK9R

Marietta, GA
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[G4GNX]

Jorg, you can have your K3S repaired by Lutz Electronics in Switzerland. He 
supports all Elecraft radios and has a comprehensive workshop.
That would save you some shipping costs and hopefully some time.

https://lutz-electronics.ch
https://lutz-electronics.ch

73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700



> On 6 Jun 2024, at 20:41, Jorge Diez - CX6VM  wrote:
> 
> hello to all
> 
> finally a local friend, couldn´t fix the TX problem with my K3
> 
> He follow all instructions that Robert gave me to check the LPA, but all
> was OK, but the K3 go to TX but no RF output
> 
> He is sending the K3 to my house again.
> 
> Don´t know what else to test?, but it seems I will need to send it to the
> USA with someone that travels there.
> 
> Do you know where to send it for service? I think Elecraft will not support
> anymore the K3
> 
> 73,
> Jorge
> CX6VM/CW5W

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Bill Johnson]

Good.  If you don't get a response, please forward your email message copy to 
me and I will gladly call them on your behalf.

Bill
K9YEQ

From: Jorge Diez - CX6VM 
Sent: Thursday, June 6, 2024 12:53:56 PM
To: Bill Johnson 
Cc: Robert Bajuk ; elecraft@mailman.qth.net 

Subject: Re: [Elecraft] K3 no transmitting

thanks Bill

my original post 2 months ago have a cc to k3support but no answer from Elecraft

i sent them again an email

73,
Jorge

El jue, 6 jun 2024 a las 16:48, Bill Johnson 
(mailto:k9...@live.com>>) escribió:
Jorge, email elecraft support to get good guidance.

Bill
K9YEQ

Bill
K9YEQ

From: elecraft-boun...@mailman.qth.net<mailto:elecraft-boun...@mailman.qth.net> 
mailto:elecraft-boun...@mailman.qth.net>> on 
behalf of Jorge Diez - CX6VM 
mailto:cx6vm.jo...@gmail.com>>
Sent: Thursday, June 6, 2024 12:41:26 PM
To: Robert Bajuk mailto:rba...@gmail.com>>
Cc: elecraft@mailman.qth.net<mailto:elecraft@mailman.qth.net> 
mailto:elecraft@mailman.qth.net>>
Subject: Re: [Elecraft] K3 no transmitting

hello to all

finally a local friend, couldn´t fix the TX problem with my K3

He follow all instructions that Robert gave me to check the LPA, but all
was OK, but the K3 go to TX but no RF output

He is sending the K3 to my house again.

Don´t know what else to test?, but it seems I will need to send it to the
USA with someone that travels there.

Do you know where to send it for service? I think Elecraft will not support
anymore the K3

73,
Jorge
CX6VM/CW5W

El jue, 9 may 2024 a las 10:35, Robert Bajuk 
(mailto:rba...@gmail.com>>) escribió:

> Hi Jorge,
>
> Try this source
>
> https://groups.io/g/Elecraft-K3/topic/replacing_k3_lpa_devices/18108669
>
> 73 Robert, S57AW
>
> On Thu, 9 May 2024, 15:08 Jorge Diez - CX6VM, 
> mailto:cx6vm.jo...@gmail.com>>
> wrote:
>
>> hello!
>>
>> I have a friend that is trying to get to LPA on the K3
>>
>> Really it needs to disassemble practically all the K3 or there's a way to
>> get to this LPA plaque easily?
>>
>> I will appreciate if you can point me to some video about how to
>> disassemble the K3 to get to LPA
>>
>> thanks!!
>>
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>> El vie, 8 mar 2024 a las 17:26, Robert Bajuk 
>> (mailto:rba...@gmail.com>>)
>> escribió:
>>
>>> Hi Jorge,
>>>
>>> Check D1 first and parts around on 10W LPA boars as already suggested
>>>
>>> See the pics attached, LPA board and D1 marked with red, hope pics pass
>>> over the reflector
>>>
>>> 73 Robert, S57AW
>>>
>>>
>>>
>>> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM 
>>> mailto:cx6vm.jo...@gmail.com>>
>>> wrote:
>>>
>>>> thanks Steve
>>>>
>>>> Could you please point me to the assembly manual page to find it?
>>>>
>>>> Mine is factory assembled, but I need to fix it here in my country, I
>>>> need
>>>> to try
>>>>
>>>> Thanks very much!
>>>>
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>>
>>>> El vie, 8 mar 2024 a las 13:32, Steve Cooke 
>>>> (mailto:sj...@hotmail.co.uk>>)
>>>> escribió:
>>>>
>>>> > Jorge . my K3 displayed the same fault sometime ago .Turned out to
>>>> > be D1 on the LPA a very fine hairline crack in the solder joint
>>>> > ...without Keith Trinity W6ER's advice in a previous reply to somebody
>>>> > else , I would never have found it .
>>>> >
>>>> >  It was only visible under a bright light ...and a
>>>> > magnifying glass .
>>>> >
>>>> >  73 steve G1MPW.
>>>> >
>>>> >
>>>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
>>>> > > hello
>>>> > >
>>>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>>>> > >
>>>> > >
>>>> > __
>>>> > Elecraft mailing list
>>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> > Help: http://mailman.qth.net/mmfaq.htm
>>>> > Post: mailto:Elecraft@mailman.qth.net
>>>> >
>>>> > This list hosted by: http://www.qsl.net
>>>> > Please help support this email list: http://www.qsl.net/donate.html
>>>&g

Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

thanks Bill

my original post 2 months ago have a cc to k3support but no answer from
Elecraft

i sent them again an email

73,
Jorge

El jue, 6 jun 2024 a las 16:48, Bill Johnson () escribió:

> Jorge, email elecraft support to get good guidance.
>
> Bill
> K9YEQ
>
> Bill
> K9YEQ
> --
> *From:* elecraft-boun...@mailman.qth.net 
> on behalf of Jorge Diez - CX6VM 
> *Sent:* Thursday, June 6, 2024 12:41:26 PM
> *To:* Robert Bajuk 
> *Cc:* elecraft@mailman.qth.net 
> *Subject:* Re: [Elecraft] K3 no transmitting
>
> hello to all
>
> finally a local friend, couldn´t fix the TX problem with my K3
>
> He follow all instructions that Robert gave me to check the LPA, but all
> was OK, but the K3 go to TX but no RF output
>
> He is sending the K3 to my house again.
>
> Don´t know what else to test?, but it seems I will need to send it to the
> USA with someone that travels there.
>
> Do you know where to send it for service? I think Elecraft will not support
> anymore the K3
>
> 73,
> Jorge
> CX6VM/CW5W
>
> El jue, 9 may 2024 a las 10:35, Robert Bajuk ()
> escribió:
>
> > Hi Jorge,
> >
> > Try this source
> >
> > https://groups.io/g/Elecraft-K3/topic/replacing_k3_lpa_devices/18108669
> >
> > 73 Robert, S57AW
> >
> > On Thu, 9 May 2024, 15:08 Jorge Diez - CX6VM, 
> > wrote:
> >
> >> hello!
> >>
> >> I have a friend that is trying to get to LPA on the K3
> >>
> >> Really it needs to disassemble practically all the K3 or there's a way
> to
> >> get to this LPA plaque easily?
> >>
> >> I will appreciate if you can point me to some video about how to
> >> disassemble the K3 to get to LPA
> >>
> >> thanks!!
> >>
> >> 73,
> >> Jorge
> >> CX6VM/CW5W
> >>
> >> El vie, 8 mar 2024 a las 17:26, Robert Bajuk ()
> >> escribió:
> >>
> >>> Hi Jorge,
> >>>
> >>> Check D1 first and parts around on 10W LPA boars as already suggested
> >>>
> >>> See the pics attached, LPA board and D1 marked with red, hope pics pass
> >>> over the reflector
> >>>
> >>> 73 Robert, S57AW
> >>>
> >>>
> >>>
> >>> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM <
> cx6vm.jo...@gmail.com>
> >>> wrote:
> >>>
> >>>> thanks Steve
> >>>>
> >>>> Could you please point me to the assembly manual page to find it?
> >>>>
> >>>> Mine is factory assembled, but I need to fix it here in my country, I
> >>>> need
> >>>> to try
> >>>>
> >>>> Thanks very much!
> >>>>
> >>>> 73,
> >>>> Jorge
> >>>> CX6VM/CW5W
> >>>>
> >>>> El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
> >>>> escribió:
> >>>>
> >>>> > Jorge . my K3 displayed the same fault sometime ago .Turned out
> to
> >>>> > be D1 on the LPA a very fine hairline crack in the solder joint
> >>>> > ...without Keith Trinity W6ER's advice in a previous reply to
> somebody
> >>>> > else , I would never have found it .
> >>>> >
> >>>> >  It was only visible under a bright light ...and a
> >>>> > magnifying glass .
> >>>> >
> >>>> >  73 steve G1MPW.
> >>>> >
> >>>> >
> >>>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
> >>>> > > hello
> >>>> > >
> >>>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
> >>>> > >
> >>>> > >
> >>>> > __
> >>>> > Elecraft mailing list
> >>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >>>> > Help: http://mailman.qth.net/mmfaq.htm
> >>>> > Post: mailto: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 cx6vm.jo...@gmail.com
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> 73,
> >>>> Jorge
> >>>> CX6VM/CW5W
> >>>> __
> >>>> Elecraft mailing list
> >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >>>> Help: http://mailman.qth.net/mmfaq.htm
> >>>> Post: mailto: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 rba...@gmail.com
> >>>
> >>>
> >>
> >> --
> >> 73,
> >> Jorge
> >> CX6VM/CW5W
> >>
> >
>
> --
> 73,
> Jorge
> CX6VM/CW5W
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 k9...@live.com
>


-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Bill Johnson]

Jorge, email elecraft support to get good guidance.

Bill
K9YEQ

Bill
K9YEQ

From: elecraft-boun...@mailman.qth.net  on 
behalf of Jorge Diez - CX6VM 
Sent: Thursday, June 6, 2024 12:41:26 PM
To: Robert Bajuk 
Cc: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] K3 no transmitting

hello to all

finally a local friend, couldn´t fix the TX problem with my K3

He follow all instructions that Robert gave me to check the LPA, but all
was OK, but the K3 go to TX but no RF output

He is sending the K3 to my house again.

Don´t know what else to test?, but it seems I will need to send it to the
USA with someone that travels there.

Do you know where to send it for service? I think Elecraft will not support
anymore the K3

73,
Jorge
CX6VM/CW5W

El jue, 9 may 2024 a las 10:35, Robert Bajuk () escribió:

> Hi Jorge,
>
> Try this source
>
> https://groups.io/g/Elecraft-K3/topic/replacing_k3_lpa_devices/18108669
>
> 73 Robert, S57AW
>
> On Thu, 9 May 2024, 15:08 Jorge Diez - CX6VM, 
> wrote:
>
>> hello!
>>
>> I have a friend that is trying to get to LPA on the K3
>>
>> Really it needs to disassemble practically all the K3 or there's a way to
>> get to this LPA plaque easily?
>>
>> I will appreciate if you can point me to some video about how to
>> disassemble the K3 to get to LPA
>>
>> thanks!!
>>
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>> El vie, 8 mar 2024 a las 17:26, Robert Bajuk ()
>> escribió:
>>
>>> Hi Jorge,
>>>
>>> Check D1 first and parts around on 10W LPA boars as already suggested
>>>
>>> See the pics attached, LPA board and D1 marked with red, hope pics pass
>>> over the reflector
>>>
>>> 73 Robert, S57AW
>>>
>>>
>>>
>>> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM 
>>> wrote:
>>>
>>>> thanks Steve
>>>>
>>>> Could you please point me to the assembly manual page to find it?
>>>>
>>>> Mine is factory assembled, but I need to fix it here in my country, I
>>>> need
>>>> to try
>>>>
>>>> Thanks very much!
>>>>
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>>
>>>> El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
>>>> escribió:
>>>>
>>>> > Jorge . my K3 displayed the same fault sometime ago .Turned out to
>>>> > be D1 on the LPA a very fine hairline crack in the solder joint
>>>> > ...without Keith Trinity W6ER's advice in a previous reply to somebody
>>>> > else , I would never have found it .
>>>> >
>>>> >  It was only visible under a bright light ...and a
>>>> > magnifying glass .
>>>> >
>>>> >  73 steve G1MPW.
>>>> >
>>>> >
>>>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
>>>> > > hello
>>>> > >
>>>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>>>> > >
>>>> > >
>>>> > __
>>>> > Elecraft mailing list
>>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> > Help: http://mailman.qth.net/mmfaq.htm
>>>> > Post: mailto: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 cx6vm.jo...@gmail.com
>>>>
>>>>
>>>>
>>>> --
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>> __
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto: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 rba...@gmail.com
>>>
>>>
>>
>> --
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>

--
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 k9...@live.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

hello to all

finally a local friend, couldn´t fix the TX problem with my K3

He follow all instructions that Robert gave me to check the LPA, but all
was OK, but the K3 go to TX but no RF output

He is sending the K3 to my house again.

Don´t know what else to test?, but it seems I will need to send it to the
USA with someone that travels there.

Do you know where to send it for service? I think Elecraft will not support
anymore the K3

73,
Jorge
CX6VM/CW5W

El jue, 9 may 2024 a las 10:35, Robert Bajuk () escribió:

> Hi Jorge,
>
> Try this source
>
> https://groups.io/g/Elecraft-K3/topic/replacing_k3_lpa_devices/18108669
>
> 73 Robert, S57AW
>
> On Thu, 9 May 2024, 15:08 Jorge Diez - CX6VM, 
> wrote:
>
>> hello!
>>
>> I have a friend that is trying to get to LPA on the K3
>>
>> Really it needs to disassemble practically all the K3 or there's a way to
>> get to this LPA plaque easily?
>>
>> I will appreciate if you can point me to some video about how to
>> disassemble the K3 to get to LPA
>>
>> thanks!!
>>
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>> El vie, 8 mar 2024 a las 17:26, Robert Bajuk ()
>> escribió:
>>
>>> Hi Jorge,
>>>
>>> Check D1 first and parts around on 10W LPA boars as already suggested
>>>
>>> See the pics attached, LPA board and D1 marked with red, hope pics pass
>>> over the reflector
>>>
>>> 73 Robert, S57AW
>>>
>>>
>>>
>>> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM 
>>> wrote:
>>>
>>>> thanks Steve
>>>>
>>>> Could you please point me to the assembly manual page to find it?
>>>>
>>>> Mine is factory assembled, but I need to fix it here in my country, I
>>>> need
>>>> to try
>>>>
>>>> Thanks very much!
>>>>
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>>
>>>> El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
>>>> escribió:
>>>>
>>>> > Jorge . my K3 displayed the same fault sometime ago .Turned out to
>>>> > be D1 on the LPA a very fine hairline crack in the solder joint
>>>> > ...without Keith Trinity W6ER's advice in a previous reply to somebody
>>>> > else , I would never have found it .
>>>> >
>>>> >  It was only visible under a bright light ...and a
>>>> > magnifying glass .
>>>> >
>>>> >  73 steve G1MPW.
>>>> >
>>>> >
>>>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
>>>> > > hello
>>>> > >
>>>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>>>> > >
>>>> > >
>>>> > __
>>>> > Elecraft mailing list
>>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> > Help: http://mailman.qth.net/mmfaq.htm
>>>> > Post: mailto: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 cx6vm.jo...@gmail.com
>>>>
>>>>
>>>>
>>>> --
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>> __
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto: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 rba...@gmail.com
>>>
>>>
>>
>> --
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>

-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Error Codes

[Gary Hembree]

There is a table of error codes starting on page 68 of the latest K3 
Owner's Manual, version D10.


You can download a pdf of this manual at
https://ftp.elecraft.com/K3/Manuals%20Downloads/E740107%20K3%20Owner's%20man%20D10.pdf

73
Gary, N7IR
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Error Codes

[DAVID MOORMAN]

Is there a listing of K3 error codes available?  They don’t appear to be in the 
manual.

Dave  K9SW
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] [K3] FM filter schematics?

[Jon Iza]

Folks,
the KFL3-FM filter seems to be hard to get, but Chinese copies of the CW
filters are available at fair prices.
There is a page with the schematics of all the "narrow" Elecraft filters
KFLxx-A but not for the -B FM filter.
I have an schematic for an LC filter in order to listen with wide
bandwidths but would like to know which changes are required on one of
those -A filters, if possible at all, to get an FM filter. Most of other
references I have on ladder filters are for SSB or CW/Data narrow filters.
Jon, ea2sn
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

Robert

thanks very much!!

73,
Jorge

El jue, 9 may 2024 a las 10:35, Robert Bajuk () escribió:

> Hi Jorge,
>
> Try this source
>
> https://groups.io/g/Elecraft-K3/topic/replacing_k3_lpa_devices/18108669
>
> 73 Robert, S57AW
>
> On Thu, 9 May 2024, 15:08 Jorge Diez - CX6VM, 
> wrote:
>
>> hello!
>>
>> I have a friend that is trying to get to LPA on the K3
>>
>> Really it needs to disassemble practically all the K3 or there's a way to
>> get to this LPA plaque easily?
>>
>> I will appreciate if you can point me to some video about how to
>> disassemble the K3 to get to LPA
>>
>> thanks!!
>>
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>> El vie, 8 mar 2024 a las 17:26, Robert Bajuk ()
>> escribió:
>>
>>> Hi Jorge,
>>>
>>> Check D1 first and parts around on 10W LPA boars as already suggested
>>>
>>> See the pics attached, LPA board and D1 marked with red, hope pics pass
>>> over the reflector
>>>
>>> 73 Robert, S57AW
>>>
>>>
>>>
>>> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM 
>>> wrote:
>>>
>>>> thanks Steve
>>>>
>>>> Could you please point me to the assembly manual page to find it?
>>>>
>>>> Mine is factory assembled, but I need to fix it here in my country, I
>>>> need
>>>> to try
>>>>
>>>> Thanks very much!
>>>>
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>>
>>>> El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
>>>> escribió:
>>>>
>>>> > Jorge . my K3 displayed the same fault sometime ago .Turned out to
>>>> > be D1 on the LPA a very fine hairline crack in the solder joint
>>>> > ...without Keith Trinity W6ER's advice in a previous reply to somebody
>>>> > else , I would never have found it .
>>>> >
>>>> >  It was only visible under a bright light ...and a
>>>> > magnifying glass .
>>>> >
>>>> >  73 steve G1MPW.
>>>> >
>>>> >
>>>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
>>>> > > hello
>>>> > >
>>>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>>>> > >
>>>> > >
>>>> > __
>>>> > Elecraft mailing list
>>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> > Help: http://mailman.qth.net/mmfaq.htm
>>>> > Post: mailto: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 cx6vm.jo...@gmail.com
>>>>
>>>>
>>>>
>>>> --
>>>> 73,
>>>> Jorge
>>>> CX6VM/CW5W
>>>> __
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto: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 rba...@gmail.com
>>>
>>>
>>
>> --
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>

-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Robert Bajuk]

Hi Jorge,

Try this source

https://groups.io/g/Elecraft-K3/topic/replacing_k3_lpa_devices/18108669

73 Robert, S57AW

On Thu, 9 May 2024, 15:08 Jorge Diez - CX6VM,  wrote:

> hello!
>
> I have a friend that is trying to get to LPA on the K3
>
> Really it needs to disassemble practically all the K3 or there's a way to
> get to this LPA plaque easily?
>
> I will appreciate if you can point me to some video about how to
> disassemble the K3 to get to LPA
>
> thanks!!
>
> 73,
> Jorge
> CX6VM/CW5W
>
> El vie, 8 mar 2024 a las 17:26, Robert Bajuk ()
> escribió:
>
>> Hi Jorge,
>>
>> Check D1 first and parts around on 10W LPA boars as already suggested
>>
>> See the pics attached, LPA board and D1 marked with red, hope pics pass
>> over the reflector
>>
>> 73 Robert, S57AW
>>
>>
>>
>> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM 
>> wrote:
>>
>>> thanks Steve
>>>
>>> Could you please point me to the assembly manual page to find it?
>>>
>>> Mine is factory assembled, but I need to fix it here in my country, I
>>> need
>>> to try
>>>
>>> Thanks very much!
>>>
>>> 73,
>>> Jorge
>>> CX6VM/CW5W
>>>
>>> El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
>>> escribió:
>>>
>>> > Jorge . my K3 displayed the same fault sometime ago .Turned out to
>>> > be D1 on the LPA a very fine hairline crack in the solder joint
>>> > ...without Keith Trinity W6ER's advice in a previous reply to somebody
>>> > else , I would never have found it .
>>> >
>>> >  It was only visible under a bright light ...and a
>>> > magnifying glass .
>>> >
>>> >  73 steve G1MPW.
>>> >
>>> >
>>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
>>> > > hello
>>> > >
>>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>>> > >
>>> > >
>>> > __
>>> > Elecraft mailing list
>>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> > Help: http://mailman.qth.net/mmfaq.htm
>>> > Post: mailto: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 cx6vm.jo...@gmail.com
>>>
>>>
>>>
>>> --
>>> 73,
>>> Jorge
>>> CX6VM/CW5W
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto: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 rba...@gmail.com
>>
>>
>
> --
> 73,
> Jorge
> CX6VM/CW5W
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

hello!

I have a friend that is trying to get to LPA on the K3

Really it needs to disassemble practically all the K3 or there's a way to
get to this LPA plaque easily?

I will appreciate if you can point me to some video about how to
disassemble the K3 to get to LPA

thanks!!

73,
Jorge
CX6VM/CW5W

El vie, 8 mar 2024 a las 17:26, Robert Bajuk () escribió:

> Hi Jorge,
>
> Check D1 first and parts around on 10W LPA boars as already suggested
>
> See the pics attached, LPA board and D1 marked with red, hope pics pass
> over the reflector
>
> 73 Robert, S57AW
>
>
>
> On Fri, Mar 8, 2024 at 8:31 PM Jorge Diez - CX6VM 
> wrote:
>
>> thanks Steve
>>
>> Could you please point me to the assembly manual page to find it?
>>
>> Mine is factory assembled, but I need to fix it here in my country, I need
>> to try
>>
>> Thanks very much!
>>
>> 73,
>> Jorge
>> CX6VM/CW5W
>>
>> El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
>> escribió:
>>
>> > Jorge . my K3 displayed the same fault sometime ago .Turned out to
>> > be D1 on the LPA a very fine hairline crack in the solder joint
>> > ...without Keith Trinity W6ER's advice in a previous reply to somebody
>> > else , I would never have found it .
>> >
>> >  It was only visible under a bright light ...and a
>> > magnifying glass .
>> >
>> >  73 steve G1MPW.
>> >
>> >
>> > On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
>> > > hello
>> > >
>> > > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>> > >
>> > >
>> > __
>> > Elecraft mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto: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 cx6vm.jo...@gmail.com
>>
>>
>>
>> --
>> 73,
>> Jorge
>> CX6VM/CW5W
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto: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 rba...@gmail.com
>
>

-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Speaker for sale

[Alan Geller via Elecraft]

Elecraft SP3 Speaker for sale. Very clean. Shipping included. Pics available. 
$185 firm. Continental US only. Please contact Alan Geller …
k6...@arrl.net.  
Sent from my iPhone
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Sub RX Not Working

[Bernie and Cheryl]

Dave:

I've had a K3s without the subreceiver for years.  When I pushed the 
"Sub" button, "No Sub" appeared in the display just like you described.


A few months ago, I bought the subreceiver and installed it. When I 
first turned the K3s on, the same "No sub" message appeared.  I then 
updated the firmware.  Once I did that, the K3s recognized the 
subreceiver, and all is well now.  It works fine and is a valuable tool 
in DX pileups.


I have four possibilities for your issue:

1) Are you sure the subreceiver is actually installed?  Opening up the 
top of the rig would let you know quickly because the subreceiver comes 
in a metal case that sits on top of the main RF board.  If, when you 
open up the top of your K3, you can see the crystal filters on the RF 
board, then that means you do NOT have a subreceiver, since the 
subreceiver would be on top.  That would explain the "No sub" message.


2) Another possibility is that you haven't updated your firmware like I 
have.  Don't ask me why that made the K3s recognize the presence of the 
subreceiver, but it did.


3) When I was installing the subreceiver, I also had to install a second 
KSYN3 board.  This is the synthesizer used by each receiver.  One KSYN3 
board won't work for both receivers. Additionally, there is an old 
version and a new version of the KSYN3 boards.  Since I had the K3s, my 
radio had the newer version, and I got the newer version of the KSYN3 
board.  I don't know if it is important for the KSYN3 boards used by 
each receiver to match, but that would make sense and it worked for me.


4) There are the TMP cables (little coaxial cables internal the K3s and 
I assume to the K3) that run from the KSYN3 boards to the subreceivers 
and to the radio itself.  Opening the top of the K3 would allow you to 
check to make sure one of these cables hasn't come loose.  One of those 
coming loose would account for the fact that your K3 doesn't recognize 
the presence of the subreceiver.


I hope this is of some help.

73 de Bernie, KF0QS

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub RX Not Working

[Keith Trinity WE6R]

As Rick said;
Go into config MENU KRX3, set it to BNC or ATU depending on how the rear 
antenna coax is cabled, then exit the menu and cycle power.

Keith WE6R K3 / K4 Tech
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub RX Not Working

[Rick NK7I]

Check the menu setting?  Not Inst?

73,
Rick nk7i


On 4/17/2024 8:39 PM, Robie Elms wrote:

Dave,

Mark sure you do not have the AUX antenna selected for your sub receiver.
Push and Hold the RX ANT button and change it from Main to AUX or vice
versa.  This selection is band sensitive.

Robie AJ4F

On Wed, Apr 17, 2024 at 10:07 PM H D Barr  wrote:


My K3 (non-S) is equipped with the second rx, which I rarely use.  After
infrequent use (got a K4) the sub rx seems to have stopped functioning;
no signal or noise  can be heard from it. When the "Sub" button is
tapped, "No Sub" appears in the display. The main rx and tx functions
seem normal.  Before I open up the K3 to see if any cables have come
loose, I am searching for more obvious (or easier to check) possible
reasons, including operator error.  Any ideas are welcome.

Thanks and 73.

Dave, K2YG

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 rule...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 rick.n...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub RX Not Working

[Robie Elms]

Dave,

Mark sure you do not have the AUX antenna selected for your sub receiver.
Push and Hold the RX ANT button and change it from Main to AUX or vice
versa.  This selection is band sensitive.

Robie AJ4F

On Wed, Apr 17, 2024 at 10:07 PM H D Barr  wrote:

> My K3 (non-S) is equipped with the second rx, which I rarely use.  After
> infrequent use (got a K4) the sub rx seems to have stopped functioning;
> no signal or noise  can be heard from it. When the "Sub" button is
> tapped, "No Sub" appears in the display. The main rx and tx functions
> seem normal.  Before I open up the K3 to see if any cables have come
> loose, I am searching for more obvious (or easier to check) possible
> reasons, including operator error.  Any ideas are welcome.
>
> Thanks and 73.
>
> Dave, K2YG
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 rule...@gmail.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Sub RX Not Working

[H D Barr]

My K3 (non-S) is equipped with the second rx, which I rarely use.  After 
infrequent use (got a K4) the sub rx seems to have stopped functioning; 
no signal or noise  can be heard from it. When the "Sub" button is 
tapped, "No Sub" appears in the display. The main rx and tx functions 
seem normal.  Before I open up the K3 to see if any cables have come 
loose, I am searching for more obvious (or easier to check) possible 
reasons, including operator error.  Any ideas are welcome.


Thanks and 73.

Dave, K2YG

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/0

[Bill Weaver]

I’m in search for a K3/0 for a buddy. Any available?

73,
Bill WE5P

Comfortably Numb
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Basic 10W DSP1 firmware missing

[Gary Gregory]

Ser #893 comes up with ERROR DSE when turned on.

I connected via the Utility software and tried to load all new FW but I get
an error...no echo d and it goes into lockup.

Repeated this several times before I noticed the FW 5.26 is loaded as is
the mcu but it is showing question marks for DSP1 and DSP2.

Basic 10w k3 so no second receiver.

Any advice on how to get the DSP FW to load?
If I get the download started it stops after the first reset with the echo
error.

Not my K3, just trying to help a friend out.
Gary
VK1ZZ
K3NHL
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 or k3s wanted

[Larry Shapiro]

Hello,
I have about 11 to choose from,
Larry K6RO

From: elecraft-boun...@mailman.qth.net  on 
behalf of Eckhart via Elecraft 
Sent: Monday, April 1, 2024 7:42 PM
To: elecraft@mailman.qth.net 
Subject: [Elecraft] K3 or k3s wanted

Hi
I am looking for a k3 or k3s. 100 watts version with ATU.

Eckhart, DK2LJ


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 k6r...@gmail.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 or k3s wanted

[Eckhart via Elecraft]

Hi 
I am looking for a k3 or k3s. 100 watts version with ATU.

Eckhart, DK2LJ


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] Elecraft K3 boards needed

[Larry Shapiro]

I am looking for some older K3 boards that most of you have upgraded,and 
probably will never use.

Ksyn3
Kant3
Kxv3
Kxv3a
Kio3

I could use 5 of each to start.
Please let me know what you have sitting around.
Thank you,
Larry K6ro 

www.LSRarecoins.com
310-710-2869

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] [K3} High SWR on 17 meters

[Dave KØEKL]

I attempted to do the TX gain calibration on my K3, S/N 1171 today but it fails 
with 2.2:1 SWR in 18 MHz.

I've tried both ANT1 and ANT ports on the K3, multiple different patch cables, 
and two different high-precision Cablewave dummy loads. With my LP-100A SWR 
meter in-line when testing it shows 1.02:1 while the K3 and the K3 utility say 
the SWR is 2.4:1.

What should ZI look at next?


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Paul,

I'd say that our respective KPA3A TX Gain calibration
values are similar enough.  Having not had the
bipolar PA model KPA3, I don't have a point of
reference for whether your TX gain parameter
values are reasonable or not.

I would contact Elecraft Support and copy
Keith, WE6R  with
a request for their troubleshooting document
dealing with 'low TX output power.'  I don't
have a copy and only learned of its existence
by Keith mentioning it in another post.  I don't
think it's posted on the Elecraft public pages.

73,
Mike, K8CN
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

thanks Steve

Could you please point me to the assembly manual page to find it?

Mine is factory assembled, but I need to fix it here in my country, I need
to try

Thanks very much!

73,
Jorge
CX6VM/CW5W

El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
escribió:

> Jorge . my K3 displayed the same fault sometime ago .Turned out to
> be D1 on the LPA a very fine hairline crack in the solder joint
> ...without Keith Trinity W6ER's advice in a previous reply to somebody
> else , I would never have found it .
>
>  It was only visible under a bright light ...and a
> magnifying glass .
>
>  73 steve G1MPW.
>
>
> On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
> > hello
> >
> > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
> >
> >
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 cx6vm.jo...@gmail.com



-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[dyno lab]

Hi Mike,

Thanks for the gain information.
I am going to look at the the gain numbers and see if there is any correlation 
with the wildly different input impedances to the output lowpass filters.

For reference, I found the input Z to the filters to be as follows:
160: 63.8 +J1.6
80:  35.7 +J5.1
40:  42.0 +J5.8
20:  32.0 -J2.1
17:  51.0 +J3.1
15:  49.6 -J0.3
10:  60.4 -J2.9
6:   51.0 +J0.14

Looking at the component values of the output filters, it appears that the 
above impedances were by design. Which makes me wonder if it was an attempt to 
compensate for the poor saturation characteristics of the MOSFETs and leakage 
inductance of the output transformer of the MOSFET amplifier (KPA3A)?

I am also finding in some cases that the K3s LPA (KLPA3A) has some problems of 
its own and does not like to play nicely with the input to the LDMOS K3s 
Retrofit Amplifier on 160 meters.
I would however like to avoid redesigning LPA by compensating for its 
shortcomings in the LDMOS amplifier.

Thanks again for your feedback.
73,
Hal
W7YNC  


> On 03/06/2024 3:07 PM PST Michael Carter via Elecraft 
>  wrote:
> 
>  
> Hi Paul,
> 
> For comparison, here are the 50 watt TX gain values from the
> calibration I did last November when I installed
> the KPA3A 100 watt PA in my K3 (s/n 67xx):
> 
> 1900 kHz TXGain HP  10
> 3750 kHz TXGain HP  06
> 5336 kHz TXGain HP  08
> 7150 kHz TXGain HP  08
> 10125 kHz TXGain HP  08
> 14200 kHz TXGain HP  05
> 18110 kHz TXGain HP  05
> 21200 kHz TXGain HP  03
> 24930 kHz TXGain HP  03
> 29000 kHz TXGain HP  05
> 52000 kHz TXGain HP  04
> 
> Do you know if your 100 watt PA module
> uses RF bipolar transistors or MOSFETs
> (the KPA3A uses MOSFETs; the original KPA3
> uses bipolars)?
> I don't know if the MOSFET version has higher gain
> than the bipolars, but I suspect not.
> 
> I've been in a separate conversation
> with Hal, W7YNC, who is an LDMOS RF amplifier
> designer professionally.  There is some
> uncertainty about whether the higher TX gain
> parameters mean higher TX drive signal
> amplitude or the converse.
> 
> In any event, your TX gain values don't
> have wild swings from band to band,
> although the difference between 20
> meter and 30 meter gains is substantial.
> 
> Perhaps some others who have done
> TX gain calibrations recently (or could
> repeat them) on K3 units with the
> bipolar PA transistors could post
> their results?
> 
> 73,
> Mike, K8CN
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 dyno...@comcast.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Steve Cooke]

Jorge . my K3 displayed the same fault sometime ago .Turned out to 
be D1 on the LPA a very fine hairline crack in the solder joint 
...without Keith Trinity W6ER's advice in a previous reply to somebody 
else , I would never have found it .


            It was only visible under a bright light ...and a 
magnifying glass .


                        73 steve G1MPW.


On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:

hello

My newer K3 is not TX anymore, on any mode, CW, SSB, FT8



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

Hi Ken

is not in test mode. I checked it

thanks!

Jorge

El vie, 8 mar 2024 a las 11:28,  escribió:

> Make sure your K3 didn't get put in "Test" mode, shown by a flashing "TX"
> toward the right side of the display.
>
> 73,
> Ken, KJ9B
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> On
> Behalf Of Jorge Diez - CX6VM
> Sent: Friday, March 8, 2024 8:59 AM
> To: Howard K6IA Elecraft Support ; Elecraft
> Reflector 
> Subject: [Elecraft] K3 no transmitting
>
> hello
>
> My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>
> The reception is OK, I can listen without problem, all buttons works OK, I
> cal also decode in FT8
>
> But when I want to transmit, no RF output, on any mode
>
> I do TUNE and the display show two lines ( _ _ ) and 0 W
>
> We used it in ARRLDX CW and it was working properly. Then I connected to
> remoterig for the remote station, I think we did some QSOs with no proble.
> other day I wanted to use it and noticed that it was not transmitting
>
> Any idea what could be wrong?
>
> thanks in advance!!
>
> --
> 73,
> Jorge
> CX6VM/CW5W
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 ken.k...@gmail.com
>
>

-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 no transmitting

[ken.kj9b]

Make sure your K3 didn't get put in "Test" mode, shown by a flashing "TX"
toward the right side of the display.

73,
Ken, KJ9B

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Jorge Diez - CX6VM
Sent: Friday, March 8, 2024 8:59 AM
To: Howard K6IA Elecraft Support ; Elecraft
Reflector 
Subject: [Elecraft] K3 no transmitting

hello

My newer K3 is not TX anymore, on any mode, CW, SSB, FT8

The reception is OK, I can listen without problem, all buttons works OK, I
cal also decode in FT8

But when I want to transmit, no RF output, on any mode

I do TUNE and the display show two lines ( _ _ ) and 0 W

We used it in ARRLDX CW and it was working properly. Then I connected to
remoterig for the remote station, I think we did some QSOs with no proble.
other day I wanted to use it and noticed that it was not transmitting

Any idea what could be wrong?

thanks in advance!!

--
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 ken.k...@gmail.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

hello

My newer K3 is not TX anymore, on any mode, CW, SSB, FT8

The reception is OK, I can listen without problem, all buttons works OK, I
cal also decode in FT8

But when I want to transmit, no RF output, on any mode

I do TUNE and the display show two lines ( _ _ ) and 0 W

We used it in ARRLDX CW and it was working properly. Then I connected to
remoterig for the remote station, I think we did some QSOs with no
proble. other day I wanted to use it and noticed that it was not
transmitting

Any idea what could be wrong?

thanks in advance!!

-- 
73,
Jorge
CX6VM/CW5W
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Fault 6 and loss of power control

[Mike Cizek W0VTT]

Hello Pete,

This happens to my K3S regularly.  After it spent WAY too much time back at the 
mother ship three years ago without them being able to reproduce the fault (RSA 
#10260, in case Keith is reading this), I was finally able to narrow down the 
cause.  

I can reproduce the fault by going from FL2 to FL3, FL3 to FL4 or by exiting 
the QRQ mode.  This makes me think it may be a firmware problem.  I'm running 
v5.67, the most recent version.  I can't figure out how to force a load of an 
earlier version to see if that cures the problem.

Has anyone else experienced this?  I can't be the only one.

---
73,
Mike Cizek WØVTT

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Pete Smith N4ZR
Sent: Wednesday, 6 March, 2024 22:12
To: Elecraft List 
Subject: [Elecraft] K3 Fault 6 and loss of power control

Today I started seeing this in my K3 driving a KPA-1500.  It only needs around 
30-34 watts to drive it to full power on CW, but when I set the K3's power to 
that, and everything looks fine, occasionally the K3 displays Fault 6 on its 
panel and causes the KPA-1500 to fault, displaying 65 watts input on the amp's 
display and well over 1500 watts on the power bargraph.

I can't find any reference to Fault 6 in the manual for the K3 - can anyone 
clue me in?  Is something dying in the K3?

--
73, Pete N4ZR
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 mgci...@gmail.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/100 TX problem on 20m

[James Holohan]

Hi. I had this problem in the recent past. It turned out to be an issue with my 
multiband yagi. It only occurred on 20m.
Hope this helps.
Jim EI4HH.

[https://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-green-avg-v1.png]
 
Virus-free.www.avg.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/100 TX problem on 20m

[Paul Kent]

Thanks again, Mike.
My K3 has the bipolar 100w PA.

I also have a properly-functioning K3S/100 with the CMOS PA. Just for 
comparison I ran the HP TX gain calibration on the K3S and it produced these 
numbers:

160m/19
80m/08
60m/10
40m/12
30m/13
20m/08
17m/08
15m/05
12m/10
10m/10
6m/06

The numbers are significantly different from those of the K3 but that probably 
doesn’t mean much. I even thought about swapping the PA modules between the K3 
and K3S as a test but they are not compatible for a direct swap.

Paul, K0PK

Sent from Mail for Windows

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Fault 6 and loss of power control

[Dick Dievendorff]

Check the KPA1500 fault log with the KPA1500 Utility.  It’s probably fault code 
60, and amp fault codes 6x are displayed on the K3 as fault 6.

7e de Dick, K6KR

> On Mar 6, 2024, at 21:13, Pete Smith N4ZR  wrote:
> 
> Today I started seeing this in my K3 driving a KPA-1500.  It only needs 
> around 30-34 watts to drive it to full power on CW, but when I set the K3's 
> power to that, and everything looks fine, occasionally the K3 displays Fault 
> 6 on its panel and causes the KPA-1500 to fault, displaying 65 watts input on 
> the amp's display and well over 1500 watts on the power bargraph.
> 
> I can't find any reference to Fault 6 in the manual for the K3 - can anyone 
> clue me in?  Is something dying in the K3?
> 
> -- 
> 73, Pete N4ZR
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 d...@elecraft.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Fault 6 and loss of power control

[Pete Smith N4ZR]

Today I started seeing this in my K3 driving a KPA-1500.  It only needs 
around 30-34 watts to drive it to full power on CW, but when I set the 
K3's power to that, and everything looks fine, occasionally the K3 
displays Fault 6 on its panel and causes the KPA-1500 to fault, 
displaying 65 watts input on the amp's display and well over 1500 watts 
on the power bargraph.


I can't find any reference to Fault 6 in the manual for the K3 - can 
anyone clue me in?  Is something dying in the K3?


--
73, Pete N4ZR
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Paul,

For comparison, here are the 50 watt TX gain values from the
calibration I did last November when I installed
the KPA3A 100 watt PA in my K3 (s/n 67xx):

1900 kHz TXGain HP  10
3750 kHz TXGain HP  06
5336 kHz TXGain HP  08
7150 kHz TXGain HP  08
10125 kHz TXGain HP  08
14200 kHz TXGain HP  05
18110 kHz TXGain HP  05
21200 kHz TXGain HP  03
24930 kHz TXGain HP  03
29000 kHz TXGain HP  05
52000 kHz TXGain HP  04

Do you know if your 100 watt PA module
uses RF bipolar transistors or MOSFETs
(the KPA3A uses MOSFETs; the original KPA3
uses bipolars)?
I don't know if the MOSFET version has higher gain
than the bipolars, but I suspect not.

I've been in a separate conversation
with Hal, W7YNC, who is an LDMOS RF amplifier
designer professionally.  There is some
uncertainty about whether the higher TX gain
parameters mean higher TX drive signal
amplitude or the converse.

In any event, your TX gain values don't
have wild swings from band to band,
although the difference between 20
meter and 30 meter gains is substantial.

Perhaps some others who have done
TX gain calibrations recently (or could
repeat them) on K3 units with the
bipolar PA transistors could post
their results?

73,
Mike, K8CN

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/100 TX problem on 20m

[Paul Kent]

Sent from Mail for Windows
Thanks, Mike.

The 50w TX gain numbers are: 160m/32, 80m/36, 60m/48, 40m/40, 30m/32, 20m/18, 
17m/11, 15m/08, 12m/05, 10m/05, 6m/02

Paul, K0PK
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[Masadaman via Elecraft]

I don't want to be here

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 9:15 AM, Paul Kent wrote:   
My K3/100 gives a high DC current warning when transmitting on 20m with power 
settings above 75 watts. Maximum output is about 80 watts and is unstable. All 
other bands perform normally with full 100w output and normal current draw. (50 
ohm dummy load) I have done the TX gain and wattmeter calibrations, finding no 
issues and with no change in symptoms. The output LPF is shared with 30m and I 
replaced all the capacitors in that circuit, also with no change in symptoms. 
Any ideas on what may be causing this problem?
Paul, K0PK
Sent from Mail for Windows

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 masada...@yahoo.com 
  
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[Masadaman via Elecraft]

This thread sucks...

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 11:29 AM, Michael Carter via 
Elecraft wrote:   Hi Hal,

The numbers themselves have meaning to the
DACs inside the K3, but in terms of actual
units I don't know.  The key thing is that as
those values are increased, the drive levels
from the TX DACs are increased, though I
don't know if the relationship is a linear one.

The gains of the LPA and PA stage transistors
fall off at higher frequencies, so one might
expect TX Gain parameters on those bands
to be somewhat higher than on the low bands.
However, if two immediately adjacent bands
have very different TX gain parameter values,
the likelihood is that something is amiss
in one of the filters (either BPF or LPF) and
the associated relays that select the filters.

73,
Mike, K8CN

From: dyno lab 
Sent: Tuesday, March 5, 2024 11:19 AM
To: Michael Carter ; Michael Carter via Elecraft 

Subject: Re: [Elecraft] K3/100 TX problem on 20m

[You don't often get email from dyno...@comcast.net. Learn why this is 
important at https://aka.ms/LearnAboutSenderIdentification ]

CAUTION: This email originated from outside of the University System. Do not 
click links or open attachments unless you recognize the sender and know the 
content is safe.


Do the TX gain parameter numbers have meaning such as dB or are they just 
relative numbers ?

73,
Hal
W7YNC


> On 03/05/2024 6:35 AM PST Michael Carter via Elecraft 
>  wrote:
>
>
> Hi Paul,
>
> Could you please post the TX gain parameters
> recorded by the K3 Utility at the 50 watt level
> for all bands?
>
> If there is a significant difference in those gain
> parameter values between adjacent bands (say
> 30 and 17 meters) and the value on the 20
> meter band, that may be an additional clue.
>
> The bandpass filter bank may be at issue here
> since you've checked the appropriate LPF.
> If there's a problem with the relay contacts
> on the relevant BPF or LPF section, that may
> also reduce the TX signal level and force
> an elevated TX Gain parameter value for that
> band.
>
> Keith, WE6R has a checklist of steps to
> try when diagnosing low TX output power.
> I recall he said to contact supp...@elecraft.com
> for that document.
>
> 73,
> Mike, K8CN
> __
> Elecraft mailing list
> Home: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255589277%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=eyHE0pZxH1RpTxfILI5NkjJ9%2FIRShoLMBS1eUQch7g0%3D&reserved=0<http://mailman.qth.net/mailman/listinfo/elecraft>
> Help: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255599937%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=ozOJqh7OFhA1gx3GIw1f%2FV97eeYPypoWmsHCcYTgDqU%3D&reserved=0<http://mailman.qth.net/mmfaq.htm>
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255606140%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=5FOFS4Ml1hDX630X%2BGsrfxZAuMD4mN7DpOcrEL9Qy2M%3D&reserved=0<http://www.qsl.net/>
> Please help support this email list: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255610908%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=p03sSEuCZI0sLthx6LTBr14T7Xm4582hA0enkk8coBE%3D&reserved=0<http://www.qsl.net/donate.html>
> Message delivered to dyno...@comcast.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 masada...@yahoo.com 
  
__
Elecraft mailing list
Home: http://mailman.q

Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Hal,

The numbers themselves have meaning to the
DACs inside the K3, but in terms of actual
units I don't know.  The key thing is that as
those values are increased, the drive levels
from the TX DACs are increased, though I
don't know if the relationship is a linear one.

The gains of the LPA and PA stage transistors
fall off at higher frequencies, so one might
expect TX Gain parameters on those bands
to be somewhat higher than on the low bands.
However, if two immediately adjacent bands
have very different TX gain parameter values,
the likelihood is that something is amiss
in one of the filters (either BPF or LPF) and
the associated relays that select the filters.

73,
Mike, K8CN

From: dyno lab 
Sent: Tuesday, March 5, 2024 11:19 AM
To: Michael Carter ; Michael Carter via Elecraft 

Subject: Re: [Elecraft] K3/100 TX problem on 20m

[You don't often get email from dyno...@comcast.net. Learn why this is 
important at https://aka.ms/LearnAboutSenderIdentification ]

CAUTION: This email originated from outside of the University System. Do not 
click links or open attachments unless you recognize the sender and know the 
content is safe.


Do the TX gain parameter numbers have meaning such as dB or are they just 
relative numbers ?

73,
Hal
W7YNC


> On 03/05/2024 6:35 AM PST Michael Carter via Elecraft 
>  wrote:
>
>
> Hi Paul,
>
> Could you please post the TX gain parameters
> recorded by the K3 Utility at the 50 watt level
> for all bands?
>
> If there is a significant difference in those gain
> parameter values between adjacent bands (say
> 30 and 17 meters) and the value on the 20
> meter band, that may be an additional clue.
>
> The bandpass filter bank may be at issue here
> since you've checked the appropriate LPF.
> If there's a problem with the relay contacts
> on the relevant BPF or LPF section, that may
> also reduce the TX signal level and force
> an elevated TX Gain parameter value for that
> band.
>
> Keith, WE6R has a checklist of steps to
> try when diagnosing low TX output power.
> I recall he said to contact supp...@elecraft.com
> for that document.
>
> 73,
> Mike, K8CN
> __
> Elecraft mailing list
> Home: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255589277%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=eyHE0pZxH1RpTxfILI5NkjJ9%2FIRShoLMBS1eUQch7g0%3D&reserved=0<http://mailman.qth.net/mailman/listinfo/elecraft>
> Help: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255599937%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=ozOJqh7OFhA1gx3GIw1f%2FV97eeYPypoWmsHCcYTgDqU%3D&reserved=0<http://mailman.qth.net/mmfaq.htm>
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255606140%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=5FOFS4Ml1hDX630X%2BGsrfxZAuMD4mN7DpOcrEL9Qy2M%3D&reserved=0<http://www.qsl.net/>
> Please help support this email list: 
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=05%7C02%7Cmike.carter%40unh.edu%7C819ad4896e5c4ba83bad08dc3d302780%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C638452524255610908%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=p03sSEuCZI0sLthx6LTBr14T7Xm4582hA0enkk8coBE%3D&reserved=0<http://www.qsl.net/donate.html>
> Message delivered to dyno...@comcast.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[dyno lab]

Do the TX gain parameter numbers have meaning such as dB or are they just 
relative numbers ?

73,
Hal
W7YNC


> On 03/05/2024 6:35 AM PST Michael Carter via Elecraft 
>  wrote:
> 
>  
> Hi Paul,
> 
> Could you please post the TX gain parameters
> recorded by the K3 Utility at the 50 watt level
> for all bands?
> 
> If there is a significant difference in those gain
> parameter values between adjacent bands (say
> 30 and 17 meters) and the value on the 20
> meter band, that may be an additional clue.
> 
> The bandpass filter bank may be at issue here
> since you've checked the appropriate LPF.
> If there's a problem with the relay contacts
> on the relevant BPF or LPF section, that may
> also reduce the TX signal level and force
> an elevated TX Gain parameter value for that
> band.
> 
> Keith, WE6R has a checklist of steps to
> try when diagnosing low TX output power.
> I recall he said to contact supp...@elecraft.com
> for that document.
> 
> 73,
> Mike, K8CN
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto: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 dyno...@comcast.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Paul,

Could you please post the TX gain parameters
recorded by the K3 Utility at the 50 watt level
for all bands?

If there is a significant difference in those gain
parameter values between adjacent bands (say
30 and 17 meters) and the value on the 20
meter band, that may be an additional clue.

The bandpass filter bank may be at issue here
since you've checked the appropriate LPF.
If there's a problem with the relay contacts
on the relevant BPF or LPF section, that may
also reduce the TX signal level and force
an elevated TX Gain parameter value for that
band.

Keith, WE6R has a checklist of steps to
try when diagnosing low TX output power.
I recall he said to contact supp...@elecraft.com
for that document.

73,
Mike, K8CN
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3/100 TX problem on 20m

[Paul Kent]

My K3/100 gives a high DC current warning when transmitting on 20m with power 
settings above 75 watts. Maximum output is about 80 watts and is unstable. All 
other bands perform normally with full 100w output and normal current draw. (50 
ohm dummy load) I have done the TX gain and wattmeter calibrations, finding no 
issues and with no change in symptoms. The output LPF is shared with 30m and I 
replaced all the capacitors in that circuit, also with no change in symptoms. 
Any ideas on what may be causing this problem?
Paul, K0PK
Sent from Mail for Windows

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3(S)/P3 Excellent Example - SOLD

[Alan Geller via Elecraft]

My "K3(S)/P3 Excellent Example” just sold. Happy result for buyer and seller. 
My XYL just
Gave the thumbs up to buy my K4D. As this stage in life, no room for duplicates 
in the house.
Thanks for all queries; some folks looking only for K3 dual receiver 
example…..THATSA RADIO!!

Alan/K6ADG


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 RIT tuning rate

[Paul Kirley]

Dear OM Mark K1RX,

The tuning rate of the K3 RIT/XIT basically follows the rate of the main VFO.  
Here are a few comments from one version of the operating manual:

VFOs and RIT/XIT
• RATE {21} selects 10 or 50 Hz VFO/RIT tuning. See VFO menu entries, pg. 57.
• FINE {21} selects 1-Hz steps. COARSE selects large steps (MAIN menu, VFO CRS).

FINE Select 1 Hz tuning for both VFOs and RIT/XIT offset

VFO CRS Per-mode Per-mode coarse tuning rate (hold COARSE and tune VFO A or B). 
Tap 1 to turn
rounding on/off. Also applies to the RIT/XIT tuning knob if CONFIG:VFO OFS  is 
set to ON, and both RIT and XIT are turned OFF.

73, Paul W8TM



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 RIT tuning rate

[Mpridesti via Elecraft]

How does one adjust the tuning rate on the RIT knob?  Right it takes multiple 
turns of the knob to reach a multiple khz change. 

Have two K3’s but one has this problem. 

Regards,

Mark, K1RX


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 RIT tuning rate

[Mpridesti via Elecraft]

How does one adjust the tuning rate on the RIT knob?  Right it takes multiple 
turns of the knob to reach a multiple khz change. 

Have two K3’s but one has this problem. 

Regards,

Mark, K1RX


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3(S)/P3 for sale - Exellent Example

[Alan Geller via Elecraft]

For Sale: K3(S)/P3. - K3 with nearly all (S) options in excellent condition. 
Very clean P3

K3 (S/N 4757) upgrades:
a. KTCXO3-1  1ppm txco
b. KSYN3AUPG  Syn Board u/g
c. KXV3B.  I/O  U/G
d. KIO3BUPKT.   I/O u/g
e. K5PF3/K5LSA-6K  Gen cov + AM 6k filter
f. All 5 filters bought or  u/g to 8 poles
g. K3SSKT.  Stainless h/w upgrade

2.  P3 -F
a. CBLP3Y.  K3S adapter cable

Included:all necessary cables, Paper and  digital manuals. Hard 
pelican case for K3

Results of 2016 factory checkout:
8 volt regulator filter cap installed
KPOD ready, FP R82 to 6.8 ohm
K3 audio protection board install
Front panel gold pins
Factory cal and alignment


Operation Pak 
Consists of Heil Goldline microphone with K3 cable, Heil large earphones and 
Bencher Iambic Paddle in Black. This is sold separately.
Although only with the XCVR.

PRICING
K3(S)/P3….$2,250
Operation Pak………   $145

Pictures available if interested. QSO available on HF. Shipping extra. Local 
pickup encouraged, Redwood City location.

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub-RX Deaf on One Band

[Michael Carter via Elecraft]

I'm glad that one was relatively easy to resolve, Pete.
No hardware intervention required - sigh of relief.
Joe is a wealth of knowledge!

73,
Mike, K8CN
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub-RX Deaf on One Band

[Pete Smith N4ZR]

Hi Mike - W4TV told me about that switching the Sub RX antenna between 
the normal input and the Aux jack on the back, which I had never known 
about. All's well now, until the next Gremlin arrives.


73, Pete N4ZR

On 1/24/2024 6:35 PM, Michael Carter via Elecraft wrote:

Hi Pete,

If you've confirmed that the RX ANT is NOT selected
on the 80 meter band for the sub-RX,  I would
check the CONFIG entry for the KRX3 to be sure
that it's not selecting the AUX RF input.  It might
have been selected inadvertently if you used
BSET to change the sub-RX settings.

73,
Mike, K8CN


__
Elecraft mailing list
Home:http://mailman.qth.net/mailman/listinfo/elecraft
Help:http://mailman.qth.net/mmfaq.htm
Post:mailto: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 topete.n...@gmail.com  

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub-RX Deaf on One Band

[Rick NK7I]

Did you check the filter settings (or filter) on the sub?

73,
Rick nk7i


On 1/24/2024 3:35 PM, Michael Carter via Elecraft wrote:

Hi Pete,

If you've confirmed that the RX ANT is NOT selected
on the 80 meter band for the sub-RX,  I would
check the CONFIG entry for the KRX3 to be sure
that it's not selecting the AUX RF input.  It might
have been selected inadvertently if you used
BSET to change the sub-RX settings.

73,
Mike, K8CN


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 rick.n...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub-RX Deaf on One Band

[Michael Carter via Elecraft]

Hi Pete,

If you've confirmed that the RX ANT is NOT selected
on the 80 meter band for the sub-RX,  I would
check the CONFIG entry for the KRX3 to be sure
that it's not selecting the AUX RF input.  It might
have been selected inadvertently if you used
BSET to change the sub-RX settings.

73,
Mike, K8CN


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub-RX Deaf on One Band

[Pete Smith N4ZR]

Yep - I tried to check that sort of thing, which I have been known to 
do.  The sub-RX , on this one band, acts like it is disconnected from 
the antenna.


73, Pete N4ZR

On 1/23/2024 8:52 PM, Gary K9GS wrote:

RX antenna activated on 80m?



73,

Gary K9GS


 Original message 
From: Pete Smith N4ZR 
Date: 1/23/24 8:42 PM (GMT-05:00)
To: Elecraft List 
Subject: [Elecraft] K3 Sub-RX Deaf on One Band

This afternoon I worked TX5S split on 10 and 15.  Tonight, I was hearing
him very well on 80, but to my surprise my SubRX seems to have gone deaf
on that band.  I've verified that it's still working fine on all other
HF bands, including 160, but for some reason no 80.  The main RX and the
transmitter are still fine on 80, which might help track it down if I
knew what I was doing.  Any ideas?

  --
73, Pete N4ZR
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 k...@gjschwartz.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3 Sub-RX Deaf on One Band

[Gary K9GS]

RX antenna activated on 80m?73,Gary K9GS
 Original message From: Pete Smith N4ZR  
Date: 1/23/24  8:42 PM  (GMT-05:00) To: Elecraft List 
 Subject: [Elecraft] K3 Sub-RX Deaf on One Band This 
afternoon I worked TX5S split on 10 and 15.  Tonight, I was hearing him very 
well on 80, but to my surprise my SubRX seems to have gone deaf on that band.  
I've verified that it's still working fine on all other HF bands, including 
160, but for some reason no 80.  The main RX and the transmitter are still fine 
on 80, which might help track it down if I knew what I was doing.  Any ideas?  
--73, Pete 
N4ZR__Elecraft 
mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: 
http://mailman.qth.net/mmfaq.htmPost: mailto:elecr...@mailman.qth.netThis list 
hosted by: http://www.qsl.netPlease help support this email list: 
http://www.qsl.net/donate.htmlMessage delivered to k...@gjschwartz.com 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

[Elecraft] K3 Sub-RX Deaf on One Band

[Pete Smith N4ZR]

This afternoon I worked TX5S split on 10 and 15.  Tonight, I was hearing 
him very well on 80, but to my surprise my SubRX seems to have gone deaf 
on that band.  I've verified that it's still working fine on all other 
HF bands, including 160, but for some reason no 80.  The main RX and the 
transmitter are still fine on 80, which might help track it down if I 
knew what I was doing.  Any ideas?


 --
73, Pete N4ZR
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3+KPA500+KAT500 RFI Revisited

[Jack Brindle via Elecraft]

Please describe the aux cables you have in use between the equipment. It is 
highly unusual for the BCD lines to change state during transmission, on any 
other time without actually changing the band on the K3.
If you are using very long Aux cables, or have other equipment connected to the 
cable (that uses the Band lines), it could account for issues. There is at 
least one band decoder kit on the market that uses
poorly designed receivers that will adversely affect the band lines in a K3 or 
K4 system to the point that the KPA receives incorrect band indication.

Are you directly monitoring the band lines with an external indicator? If so, 
please describe the indicator.
The KPA _will_ change bands due to a signal on another band (such as a 
harmonic). We have not seen that to this point with K3 or K4, but it is 
certainly possible. Not that the RF signal count always overrides the band 
signals - it counts the strongest signal at its input.

This situation may be due to RFI, but I am suspecting something else at 
present, such as very long AuxBus cables or an issue in the system. Any further 
info you can provide would be very helpful - is there another transmitter near 
by, or anything else that may be injecting alternate signals into the amplifier 
(usually on the xcvr input side, but if strong enough it could come in through 
the antenna). Note that a very strong signal coming into the antenna port would 
also affect the SWR calculations and display.

Something is going on, but it may surprise you when you discover it.

73,
Jack, W6FB


> On Jan 12, 2024, at 2:18 PM, Jeff Wandling  wrote:
> 
> Dear Elecraft aficionados:
> 
> The symptom is KPA switching bands during Tx.
> 
> Seems like a while ago I was troubleshooting the RFI problem between the 
> equipment.
> 
> K3 + KPA500 + KAT500
> 
> Using the "enhanced" configuration where serial cable between the K3 to KAT 
> to KPA assisted in communicating band changes as well as key-down event and 
> so on.
> 
> I own two KPA-500's. Both are less than 6mo old.
> 
> Let me refer to them as KPA-1 and KPA-2. KPA-1 is in the hands of Elecraft 
> for repair. It worked flawlessly (until needing repair), but the RFI issue I 
> will write about did not exist when that KPA-1 was in the chain.
> 
> KPA-2 was purchased in December as a backup. Since putting KPA-2 in-line, the 
> RFI problems I will describe have gone unresolved.
> 
> Scenario is with KPA-2 in-line.
> 
> Even running tiny power (< 10W, <15 W) I can routinely and 100% reproduce the 
> problem where the BCD data in the AUX line that carries the information about 
> which band the KPA should be set on will change during Tx.
> 
> For example I can put KAT into MAN, put KPA in bypass. Tune the antenna via 
> K3 and witness the search resolve to a 1:1 on the SWR. That sometimes will 
> trigger the effect -- I can see in the KPA, even in bypass that the band the 
> KPA is set on is changed from the band the K3 is set on. Even more insidious 
> is that if the KPA winds up on a different band after the tune (or after 
> "VVV" CW testing after tune), that pressing the band button on the KPA to 
> bring it back does not bring the KPA back to the right band. It is as if the 
> KPA has two states of band-awareness.. The awareness of the band displayed in 
> the LCD and the band that the input is set for.
> 
> Here's an example:
> K3 on 40m
> Tune per usual (KAT MANUAL, KPA Bypass)
> KPA remains on 40m.
> K3 power output 14W
> Then put the KPA into Operate
> Tap "VVV" out on the key.
> Witness the KPA operate but then switch band to 30m or 17m or 20m, etc.. (not 
> expected)
> Then on the KPA tap (Band) 7 (for the 40m band) and nothing happens (not 
> expected)
> Tap on the KPA 14 then the whole chain switches to 20m (expected)
> 
> Suppose the TUNE did not yield a band-switch during Tx, repeating the test 
> but this time putting the KPA into Operate after the tune is sure-fire going 
> to cause the bandswitch.
> 
> (I configured the KPA to go to Bypass in the event of a band-change event in 
> order to have some sense of protection while the key-down test Tx occurs).
> 
> That's the scenario where after Tx the KPA is out of sync with the K3. 
> Whether or not the KPA is attempting to frequency-count is not evident, the 
> KPA:RADIO setting is "K3" which means leverage the BCD data from the K3 
> vis-a-vis the KAT path.
> 
> I can replicate this band-inconsistency at will. I don't think I can safely 
> operate the equipment if the BCD encoded band data is fluctuating during Tx. 
> What would happen if I switched bands (N1MM) and hit the keyer and the KPA 
> got confused on the last Tx? Magic smoke I imagine.
> 
> Only happened with KPA-2 not KPA-1. But I'm wondering if KPA-1 suffered a 
> catastrophe caused by this scenario and I didn't notice the clicking 
> band-switch because I had not expected it to switch bands during Tx.
> 
> What have I done to remedy? I think I've tried everything but obviously I 
> have

Re: [Elecraft] K3+KPA500+KAT500 RFI Revisited

[Jim Brown]

On 1/12/2024 12:18 PM, Jeff Wandling wrote:

Seems like a while ago I was troubleshooting the RFI problem between the 
equipment.


Is everything in your home and your station properly bonded and grounded?
Is every chassis on your operating desk bonded together?
Is the operating desk common point bonded to all the grounds in your home?
http://k9yc.com/GroundingAndAudio.pdf
Are there arrestors on all of your antennas, and are they bonded to the 
other grounds?
Are there serious ferrite chokes at the feedpoint of every antenna? A 
serious ferrite choke is one of these.

http://k9yc.com/2018Cookbook.pdf
If you're using any form of end-fed antenna, including a vertical, does 
it have radials or a counterpoise?


There's one other mechanism that I'm aware of, having been a beta tester 
for KA500 years ago. When running two radios with amps and tuners, their 
frequency-detecting circuitry for station #1 while in receive can get 
enough RF from station #2 transmitting to switch to station #2's band. 
This depends primarily on how close the antennas for the two stations 
are to each other and how much power we're running. This is very old 
info, from the early days of KAT500, and may have been minimized by 
later versions of firmware.


73, Jim K9YC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto: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 arch...@mail-archive.com 

Re: [Elecraft] K3+KPA500+KAT500 RFI Revisited

[Walter Underwood]

Before replacing cables or adding ferrites, I would make sure that all the 
chassis are bonded together with short runs of heavy gauge wire. Differences in 
ground potentials between equipment can make a mess of things.

For more info, get the book on grounding and bonding from the ARRL.

https://www.arrl.org/grounding-and-bonding-for-the-amateur

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

> On Jan 12, 2024, at 12:18 PM, Jeff Wandling  wrote:
> 
> Dear Elecraft aficionados:
> 
> The symptom is KPA switching bands during Tx.
> 
> Seems like a while ago I was troubleshooting the RFI problem between the 
> equipment.
> 
> K3 + KPA500 + KAT500
> 
> Using the "enhanced" configuration where serial cable between the K3 to KAT 
> to KPA assisted in communicating band changes as well as key-down event and 
> so on.
> 
> I own two KPA-500's. Both are less than 6mo old.
> 
> Let me refer to them as KPA-1 and KPA-2. KPA-1 is in the hands of Elecraft 
> for repair. It worked flawlessly (until needing repair), but the RFI issue I 
> will write about did not exist when that KPA-1 was in the chain.
> 
> KPA-2 was purchased in December as a backup. Since putting KPA-2 in-line, the 
> RFI problems I will describe have gone unresolved.
> 
> Scenario is with KPA-2 in-line.
> 
> Even running tiny power (< 10W, <15 W) I can routinely and 100% reproduce the 
> problem where the BCD data in the AUX line that carries the information about 
> which band the KPA should be set on will change during Tx.
> 
> For example I can put KAT into MAN, put KPA in bypass. Tune the antenna via 
> K3 and witness the search resolve to a 1:1 on the SWR. That sometimes will 
> trigger the effect -- I can see in the KPA, even in bypass that the band the 
> KPA is set on is changed from the band the K3 is set on. Even more insidious 
> is that if the KPA winds up on a different band after the tune (or after 
> "VVV" CW testing after tune), that pressing the band button on the KPA to 
> bring it back does not bring the KPA back to the right band. It is as if the 
> KPA has two states of band-awareness.. The awareness of the band displayed in 
> the LCD and the band that the input is set for.
> 
> Here's an example:
> K3 on 40m
> Tune per usual (KAT MANUAL, KPA Bypass)
> KPA remains on 40m.
> K3 power output 14W
> Then put the KPA into Operate
> Tap "VVV" out on the key.
> Witness the KPA operate but then switch band to 30m or 17m or 20m, etc.. (not 
> expected)
> Then on the KPA tap (Band) 7 (for the 40m band) and nothing happens (not 
> expected)
> Tap on the KPA 14 then the whole chain switches to 20m (expected)
> 
> Suppose the TUNE did not yield a band-switch during Tx, repeating the test 
> but this time putting the KPA into Operate after the tune is sure-fire going 
> to cause the bandswitch.
> 
> (I configured the KPA to go to Bypass in the event of a band-change event in 
> order to have some sense of protection while the key-down test Tx occurs).
> 
> That's the scenario where after Tx the KPA is out of sync with the K3. 
> Whether or not the KPA is attempting to frequency-count is not evident, the 
> KPA:RADIO setting is "K3" which means leverage the BCD data from the K3 
> vis-a-vis the KAT path.
> 
> I can replicate this band-inconsistency at will. I don't think I can safely 
> operate the equipment if the BCD encoded band data is fluctuating during Tx. 
> What would happen if I switched bands (N1MM) and hit the keyer and the KPA 
> got confused on the last Tx? Magic smoke I imagine.
> 
> Only happened with KPA-2 not KPA-1. But I'm wondering if KPA-1 suffered a 
> catastrophe caused by this scenario and I didn't notice the clicking 
> band-switch because I had not expected it to switch bands during Tx.
> 
> What have I done to remedy? I think I've tried everything but obviously I 
> have a gap -- otherwise I'd have solved this problem.
> 
> - New coax between everything.
> - Shorter or longer coax, different coax (RG-213, 8X, LMR-240, etc..)
> - Tighter loops (6 -8") when there is excess coax or lazy big loops where 
> there is excess coax.
> - New connectors/adapters (Yes, Amphenol)
> - Re-route coax different ways. Avoid this, that and the other, etc.. 
> Permutations of routing.
> - Move and adjust placement of equipment. KAT near the KPA, KAT away from the 
> KPA, both near or away from the K3, etc..
> - Chokes between things. K3 to KPA, KPA to KAT, KAT to antenna system
> - Non-bleeding chokes, bleeding chokes.
> - Ferrite on serial cables, more ferrite, insane amounts of ferrite, or zero 
> ferrite
> - Move the position of serial cables above, below, up, down, left, right.
> 
> I haven't got to the point of putting little tangerines on altars and burning 
> incense. I'm trying to keep a positive mood while part of me wants to take up 
> the art of Bonsai and raking the sand.
> 
> Obviously RFI is a likely culprit, but I'll be damned if I can figure out 
> where it is -- or rather why it would be --

[Elecraft] K3+KPA500+KAT500 RFI Revisited

[Jeff Wandling]

Dear Elecraft aficionados:

The symptom is KPA switching bands during Tx.

Seems like a while ago I was troubleshooting the RFI problem between the 
equipment.

K3 + KPA500 + KAT500

Using the "enhanced" configuration where serial cable between the K3 to KAT to 
KPA assisted in communicating band changes as well as key-down event and so on.

I own two KPA-500's. Both are less than 6mo old.

Let me refer to them as KPA-1 and KPA-2. KPA-1 is in the hands of Elecraft for 
repair. It worked flawlessly (until needing repair), but the RFI issue I will 
write about did not exist when that KPA-1 was in the chain.

KPA-2 was purchased in December as a backup. Since putting KPA-2 in-line, the 
RFI problems I will describe have gone unresolved.

Scenario is with KPA-2 in-line.

Even running tiny power (< 10W, <15 W) I can routinely and 100% reproduce the 
problem where the BCD data in the AUX line that carries the information about 
which band the KPA should be set on will change during Tx.

For example I can put KAT into MAN, put KPA in bypass. Tune the antenna via K3 
and witness the search resolve to a 1:1 on the SWR. That sometimes will trigger 
the effect -- I can see in the KPA, even in bypass that the band the KPA is set 
on is changed from the band the K3 is set on. Even more insidious is that if 
the KPA winds up on a different band after the tune (or after "VVV" CW testing 
after tune), that pressing the band button on the KPA to bring it back does not 
bring the KPA back to the right band. It is as if the KPA has two states of 
band-awareness.. The awareness of the band displayed in the LCD and the band 
that the input is set for.

Here's an example:
K3 on 40m
Tune per usual (KAT MANUAL, KPA Bypass)
KPA remains on 40m.
K3 power output 14W
Then put the KPA into Operate
Tap "VVV" out on the key.
Witness the KPA operate but then switch band to 30m or 17m or 20m, etc.. (not 
expected)
Then on the KPA tap (Band) 7 (for the 40m band) and nothing happens (not 
expected)
Tap on the KPA 14 then the whole chain switches to 20m (expected)

Suppose the TUNE did not yield a band-switch during Tx, repeating the test but 
this time putting the KPA into Operate after the tune is sure-fire going to 
cause the bandswitch.

(I configured the KPA to go to Bypass in the event of a band-change event in 
order to have some sense of protection while the key-down test Tx occurs).

That's the scenario where after Tx the KPA is out of sync with the K3. Whether 
or not the KPA is attempting to frequency-count is not evident, the KPA:RADIO 
setting is "K3" which means leverage the BCD data from the K3 vis-a-vis the KAT 
path.

I can replicate this band-inconsistency at will. I don't think I can safely 
operate the equipment if the BCD encoded band data is fluctuating during Tx. 
What would happen if I switched bands (N1MM) and hit the keyer and the KPA got 
confused on the last Tx? Magic smoke I imagine.

Only happened with KPA-2 not KPA-1. But I'm wondering if KPA-1 suffered a 
catastrophe caused by this scenario and I didn't notice the clicking 
band-switch because I had not expected it to switch bands during Tx.

What have I done to remedy? I think I've tried everything but obviously I have 
a gap -- otherwise I'd have solved this problem.

- New coax between everything.
- Shorter or longer coax, different coax (RG-213, 8X, LMR-240, etc..)
- Tighter loops (6 -8") when there is excess coax or lazy big loops where there 
is excess coax.
- New connectors/adapters (Yes, Amphenol)
- Re-route coax different ways. Avoid this, that and the other, etc.. 
Permutations of routing.
- Move and adjust placement of equipment. KAT near the KPA, KAT away from the 
KPA, both near or away from the K3, etc..
- Chokes between things. K3 to KPA, KPA to KAT, KAT to antenna system
- Non-bleeding chokes, bleeding chokes.
- Ferrite on serial cables, more ferrite, insane amounts of ferrite, or zero 
ferrite
- Move the position of serial cables above, below, up, down, left, right.

I haven't got to the point of putting little tangerines on altars and burning 
incense. I'm trying to keep a positive mood while part of me wants to take up 
the art of Bonsai and raking the sand.

Obviously RFI is a likely culprit, but I'll be damned if I can figure out where 
it is -- or rather why it would be -- affecting this given all of the 
mitigations attempted.

But I'm always a student and looking for things that were/are not obvious at 
first.

I'm almost to the point where I will take away the "enhanced" mode serial data 
path between the equipment and rely on the analog key-line between them and RF 
frequency-counter capabilities so that the KAT and the KPA are on the right 
band when I key-down. I just need to review the docs to make sure I have the 
KPA and the KAT setup to go "analog" rather than "KPA:RADIO = K3" mode.

But the 'enhanced' mode is much more preferred since it is a K-line.

Thoughts and suggestions welcome. Ping directly if you wish.

Thanks!

Jeff

-