Re: Oscillator Distortion

On Sun, 13 Oct 2024 17:39:53 -0700, dplatt@coop.radagast.org (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?

The time reponse of the filaments, as compared to the Q of the basic
oscillator, must be interesting. There are no doubt papers somewhere.