Re: Oscillator Distortion

On Sun, 13 Oct 2024 17:39:53 -0700, Dave Platt wrote:
 

In article <veguu6$ofj1$3@dont-email.me>,
Cursitor Doom  <cd999666@notformail.com> wrote:
 

I've found an issue with the principal oscillator. It's generating
distorted sine waves. It's a wien bridge type using BJTs as the gain
element and fine tungsten filaments as thermistors, so should produce
near perfect sine waves before they're chopped and shaped by subsequent
circuitry, but since the fall, it's not.

 
Is there a chance that the impact broke one of those fine tungsten
filaments?  Do they read low-Z when cold, as they should?

 
It's one thing I need to look at, if only for the sake of completeness,
next time I have access to it. Since these are so hard to replace, I'd
really rather deal with my original suspicion that something got shorted
out in the fall.