the driver board keeps burning out transistors when a signal is applied, it had 4 stuffed output transistors when i got it ,i replaced all 8 of these these but it burnt out left side of driver board when signal was applied, i replaced those then i applied power it was ok as before until i applied signal,this time it was right side, 8 transistors burnt out .ihave since found a dicky varistor? double diode? on the regulated power supply & protector board! would that be the cause of my woes? what do you think! i have had some suggestions from ginko,but i think he needs more info (here it is) regards ross
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