XPost: sci.electronics.design   
   From: jl@glen--canyon.com   
      
   On Sun, 13 Oct 2024 17:39:53 -0700, dplatt@coop.radagast.org (Dave   
   Platt) wrote:   
      
   >In article ,   
   >Cursitor Doom   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.   
      
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