[Elecraft] KPA500 going into standby

Mon Apr 27 16:41:52 EDT 2015

In working the FQP this weekend, my KPA500 went into Standby on its own a  
few times when it was transmitting.  I believe it only happened when I was  
on 10m.  

Here were the conditions:
Transceiver: TS480
Power: appx 400 watts
Temp: 54C
Current: 10 amps during tx

HV: 61 Volts
VSWR: 1.4:1
Antenna: 10m monoband yagi

What would be a likely cause for this?

73, George, K5KG

George  Wagner, K5KG
Sarasota, FL  34242
941-400-1960