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rec.audio.tubes

Tube-based amplifiers... that go to 11

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Message 52,745 of 52,877

G.Re to All

Fisher 30-A amp

01 Mar 20 09:56:10

   From: mynamespacedbydots@xs4all.nl   
      
   Hi folks,   
      
   What is the reason the Fisher 30-A uses (very) different valued grid   
   resistors for the power tubes?   
   - R9 = 2K2 for V2   
   - R4 = 33K for V3   
   https://www.flickr.com/photos/derekva/7211152916/in/photostream/   
      
   A later (or earlier?) 30-A version has no grid resistors,  also no balance   
   circuit for the phase inverter.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)

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