Building a solid state guitar amp, everything is ready to go except my rail power is too high. I'm running 52 volts and would like to get around 25-30 volts. I'm using a 36 volt power supply w center tap into a full wave rectifier and two 2200uf 50v caps. What's my best solution? Thanks

Thanks a ton! Just about have everything soldered except those and a power switch and led. Should be quite the little jammer!

Building a chipamp based on a LM1875. I'm using 2200uF caps in the amp circuit and a 34.5vac transformer. Really the only question I have is what size filter caps to use after the rectifier.

We opted to let it die in peace. The nice thing is its modular so the power amp can be switched out very easily should he find another one. Not worth trying to fix when another can be had for about the same price. I'll offer to waive his bench fee and add $20 to keep it for parts

Here's the PDF. It took me a minute just to find the power amp page..so I see where your coming from..lol.

Yep definitely thought about taking it off his hands! But heres the schematic. I have a PDF file too.

Yeah, I've dealt with them a few times and its always pleasant. I let my customer know his parts are $$$ he's on the fence with getting it repaired because he can get another one for $150. He's thinking about it and will let me know. I'd like to get some progress on it in the next day or so and see if I can't get it buttoned up quickly. BBL

Just put a request in for a schematic with Gene over at Peavey. I'll get it posted later tonight when I get out of work.

I have quite a few MJI15004's too.

Also have quite a few MJI5003's still not sure if those would work - 140V 250W.
IRF230's are 200V 75W. I didn't notice it until now, 2 of the 4 transistors in there were RFM10P15's and not IRF230's.

Here ya go, its a Peavey Megabass. Already have a limiter. IRF230's were soldered in through a heatsink, even the screws were soldered in to the board.

Found IRF250's at $6.50 ea, will those work?

I never mounted a transistor like that, a pic would be great.

Couldn't find a schematic for this anywhere. I think this amp was plugged into the wrong ohm cab. I tested all the IRF230's and they all failed. There are also 4 3 legged transistors (one next to each IRF230) that have the middle legs snipped off. I tested those in circuit they conduct one way only so I assume those are good.

The only place I found any IRF230's in stock they are $13.49 a piece, any better sources out there? I need 4 for a Megabass head.