[Elecraft] Err TXG message

[Igor Sokolov]

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