Orange Squeezer oscillating like crazy?

[elenore19]

Hey everyone. So I built an orange squeezer clone and fired it up and just got crazy oscillations where the pitch could be adjusted by two pots. (I externalized the threshold trim pot..)
Any suggestions as to what could be causing this? I'm pretty sure I fried one of the transistors because I had a solder bridge that connected the 9v to the S terminal of one 5457. New transistors are in the mail and should be arriving anytime. Would that cause this problem though? I'm working on a 1590A build with this guy so there very well could be some wire issues as well. Figured it wouldn't hurt to ask though.

Thanks guys.

-Elliot

[petemoore]

 The transistors control the gain, and the OS gain reduction isn't large.
  The oscillations could be caused by anything, measureing continuity to all grounds gets that out of the way, however following the entire debugging thread-sticky is the best approach.

[earthtonesaudio]

Oscillation means positive feedback, which you can get if the smoothing cap (the one connected to ground after the diode) is too small or faulty.