SO I came across a hartke model 3500 mosfet on ebay....got for $150.....the amp side is smoked. I called Samson about getting repairs done, the tech told me they have a new board that will fit it for about 75 bucks plus shipping, said it would be cheaper than sending it in for repairs. I got screwed on the buy in the 1st place, now should I spend the cash on a new board? Are these amps any good? I think this one was a mid-late 80's model.