[Elecraft] KAT3A 160M issue

[Gary Smith]

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