[Amps] sb220...pop.

[N7uvh at aol.com]

I am not to good with repairing ham gear.. but wonder if any sb220 guys would 
know about this problem.
running the amp had a bang.. near the plate voltage meter.. now that amp will 
only work in when the meter switch is in the grid postion.. if in the rel. 
power I can hear some small sparking like going to ground inside.. not loud.. 

I would like to run the amp for the roundup but did not want to do any major 
damage.. and do you know what part might have failed.. I have the manual and 
might be able to take it on if simple.. 

tnx..Pat n7uvh