[Amps] SGC-500

[WA3GIN]

Hi folks,

Strange happens with this amp.  With key down CW 10 watts in the SGC amp yields 250 watts output.  15 watts input and the amp faults indicating high SWR.  SWR is not the problem.  The problem is recreated into a 50 resistive load.

SGC states average input power required is about 50 watts and the amp is rated up to 150 watts input with built-in attentuator.  

Thoughts welcome,
dave
wa3gin