Igor,
Try this: attach the dummy load and then tune the ATU into it. Then
switch the ATU to BYPASS for the calibration.
I am not sure why this helps, but it is worth a try. This is only for
the non-S version K3, in which the ATU is not really bypassed.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.
On 01/07/2020 23:48, Igor Sokolov wrote:
My K3 S/N 1651 has developed a problem showing ERR TXG message from time
to time on different bands and 2.5:1 SWR on 28 MHz even into dummy load.
In fact I think these are two separate unrelated issues, but I might be
wrong.
TX gain calibration fails for 5 W (does not go above 4.5W) and works OK
for 50W everywhere but on 28 MHz because of high SWR.
I have filled in the tech support form on the Elecraft site about a
week ago but did not receive no response. I understand that is
associated with COVID problem. So may be someone on the reflector can
advise me what to do. Sending the radio back to the factory is not an
option.
73, Igor UA9CDC
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