[Elecraft] KAT 500 Loses Match

[Victor Rosenthal]

It sounds like a bad connection or arc-over in a connector, cable, 
balun, etc. after the KAT500. I had a similar issue that drove me nuts 
for weeks until I found a corroded solder connection in a balun at the 
feedpoint of an antenna. It does not sound like an RFI issue.

73, Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco

On 12/01/2024 23:46, Paul Ecker wrote:
> I am experiencing a new problem for me, with my KAT 500. So far I've
> noticed this issue on 30M. I am using a dipole cut only for 30M with an SWR
> of 1.2 to 1.3 max SWR across the band. I “trained the tuner” at 20khz
> segments on 30M.
>
> Setup is K4D, KAT 500 & KPA 500. Win 10 pc.
>
> Running CW, I can start transmitting and all is fine- my LP100A is showing
> 1.2 SWR and am getting max power out of the radio. Then all of sudden the
> SWR jumps to >9.0. The KAT starts chattering and finds a new match. But if
> I start transmitting again – pwr out is only about 10 W at that new match,
> and eventually the tuner becomes untuned again. Sometimes, it will then
> hold the tune but still only getting abt 9-10w power out. The issue occurs
> with KPA500 both on and off.
>
> Does this sound like a KAT 500 problem or maybe an RFI problem.
>
>
> 73 Paul
>
> w2eck
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