KAT3A 160M issue

[Gary Smith-2]

I have been having unusual transmit issues
with 160M, SWR issues I have long thought
was antenna related.

Last night I found when transmitting on
160 the SWR on the LP-100 suddenly showed
9.1 and the same with the remote sensor
for the P3 but no output shown on the P3
wattmeter. I connected a dummy to the amp,
same issue. attached it to the back of the
K3s & the same issue with the autotuner
unable to get a good match (HIGH SWR).

This was only on 160, all other bands were
fine.

I pulled a KAT3 from my backup K3 and all
now works well, 160M had what showed as a
beautiful SWR & the amp was very happy
showing a 1.2 SWR

Before I call Elecraft & take up their
tech time on a phone call, is there
anything I might check on this KAT3A
regarding a 160 failure before starting a
RMA? The 160 toroid looks fine and no
obvious issues show to inspection.

thanks & 73,

Gary
KA1J

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Vic Rosenthal]

If I had a problem with a KAT3, the first thing I would check would be
the relays.
But where is the LP100 connected? It must be AFTER the KAT3, so a
problem in the KAT3 would not change the SWR indicated on the LP100 (or
the P3 for that matter).
Maybe you had a cable, connector, or antenna problem that damaged the
KAT3 somehow?

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 11/04/2019 15:44, Gary Smith wrote:

> I have been having unusual transmit issues
> with 160M, SWR issues I have long thought
> was antenna related.
>
> Last night I found when transmitting on
> 160 the SWR on the LP-100 suddenly showed
> 9.1 and the same with the remote sensor
> for the P3 but no output shown on the P3
> wattmeter. I connected a dummy to the amp,
> same issue. attached it to the back of the
> K3s & the same issue with the autotuner
> unable to get a good match (HIGH SWR).
>
> This was only on 160, all other bands were
> fine.
>
> I pulled a KAT3 from my backup K3 and all
> now works well, 160M had what showed as a
> beautiful SWR & the amp was very happy
> showing a 1.2 SWR
>
> Before I call Elecraft & take up their
> tech time on a phone call, is there
> anything I might check on this KAT3A
> regarding a 160 failure before starting a
> RMA? The 160 toroid looks fine and no
> obvious issues show to inspection.
>
> thanks & 73,
>
> Gary
> KA1J
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html