[Amps] Alpha 87A Question

[jon s]

I am relaying this for my Father (AI9U) who does not subscribe
 
Last night he was back at his station after a 10 day period of non-use
 
FT920/Alpha 87A/3 ele Steppir/40_80 Dipole
 
With the Amplifier Off - but still in line he was using the tuner to match the dipole, when an "incredible bang" (his words) occured in the amplifier,  tripping the 220V breaker. Upon reseting the breaker, the Alpha powered up but would not do much else
 
Anyone ever have something like this happen? 
 
I'm wondering how in the world it could have happened with the power switch Off. 
 
Anyone care to speculate on a cause?
 
Guess it is going to be a low power entry in the Phone Sprint for me at his house tonight, ;-)
 
Thanks in advance for anyone's help/advice
 
73
Jon
K9JS
 
 

		
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