[Elecraft] KPA500 Died

[Bill W2BLC]

Due to recent experience, I have to wonder about the KAT500???

Do you have a resonant antenna or a high power dummy load you can go to 
directly - removing the KAT500 from the antenna circuit? If it works 
without the tuner in line - then you have likely eliminated the KPA500 
as the problem.

I did a similar test using a dummy load (Mil-Spec 2 kW)  with the KAT500 
in line and carried on a "QSO" while watching all the meters. After 
about 45 seconds the tuner went nuts and started a retune - with no 
change in frequency etc. having been made. I did this to eliminate any 
futher waste of time checking and repairing non-existent antenna problems.

For the naysayers: The dummy load does not heat up at that low power.

Going directly to a dummy load eliminates everything in the antenna line(s).

Bill W2BLC K-Line