[sdiy] TR-909 repair Q

[Jim Johnson]

Well, the "dirt cheap" 909 I got a few months back has not been the
blessing I thought it would be :'(. There were a couple of problems with
it, and rather than muck with it myself, I decide to take it to a local
tech. He solved one problem, but has been hung up on the other, which is:

The snare's "crack" sound is intermittently inaudible. What happens is
that, when it's first powered up, the snare works fine, but after some time
- five minutes, an hour, whatever - the "crack" slowly fades away to
nothing.

Clearly it's something in the snare's VCO.. but what? The guy has been
trying to isolate it with heat and cold, but so far no luck - once it goes
away, it stays away. 

Hoping that someone else has run into the same problem, and solved it.  


Jim Johnson 
Metaphoric Software
-------------------
Makers of Techno Toys
Software for Electronic Music
http://www.technotoys.com
info at technotoys.com