Voltage Checks

[deserat]

Staring at the center board everything looks to be in the right place.  Two things I'm noting.

the 2N2222A transistor on the B side of the board looks a little blacked, like burnt.  I don't recall seeing any smoke but, hey I thought I had the thing wired correctly.

Any chance you could link me to the right transistor over on digi-key or mouser? While I'm at it I think replacing the trim pots that I over snipped the leads on might make sense, may as well get it right.

I'm guessing the trim pot is one of the 2K variants of these but I don't know which:
http://www.digikey.com/products/en?keywords=%202N2222A%20transistor

Same thing here for the 2N2222A:
http://www.digikey.com/products/en?keywords=%202N2222A%20transistor

 

[Paul Birkeland]

The central 2N2222 is a fine choice.  You might want to ask replacement parts about getting parts directly from us, as there will be less guess work.

An acceptable substitute for the trim pot is Digikey 3299Y-202LF-ND.

-PB

 

[deserat]

Thanks I'm email replacementparts now. 

 

[deserat]

Ok. Got parts. Put them in... no affect.  It's gotten to the point where I've taken the c4s boards off so many times that the hookup wire is breaking.  Given that there appears to be no way to debug the amp beyond the stated few voltage checks,  I'm throwing in the towel and will take advantage of the repair service. Thanks for ya'lls help. It has been that kind of frustration that I consider fun.