GE128s not working

Frequent questions about dead or faulty pedals. Whether you repair, mod or build pedals, debugging is important. Threads about general debugging problems irrespective of the circuit involved...

GE128s not working

Postby curt mitchell » 07 Mar 2012, 12:36

Hope I'm in the right forum, and not re-re-re submitting a beaten issue. I'm new to this and this forum. That said:

I have a breadboarded FF, I bought some AC128 matched transistors, Q1 Hfe83 Q2 Hfe 122 ( I'm close to understanding the meaning of these numbers)

And the machine wont work.

Now it will run with 3904s, but not the Germanium. I understand that the 3904 is an NPN, and the Germanium are PNP, so I turned the things around, thinking that might get it, no luck.

I used the GEofex schem to build the thing, it's the 2nd thing I've tried, I put together a boost pedal first. It worked, made alot of RF racket.

I have 2 components that are not to spec, the 1K variable is 5K, and the 8.2K is a 10K, given a choice between the 330 or 470, I have in it a 470.

These were parts I was able to procure from the radio shack where I live. Any help and knowledge would be greatly appreciated.
THANKS!
curt mitchell
 
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Re: GE128s not working

Postby curt mitchell » 08 Mar 2012, 22:53

I pulled it apart, rebuilt it using the schem for PNP and it's working.

The odd thing, it only works when I reversed the polarity of the batt.

I know this is a beaten subject, but I'm just starting. The search of the forum can't quite dial in what I'm looking for.

I took a 101 electronics class, didn't get a whole lot out of it, still going a bit over my head.

Anyways, it works.

IS there a dedicated Fuzz Face forum I should be in?

THanks
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