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Fisher 30-A amp



 
 
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Old March 1st 20, 08:56 AM posted to rec.audio.tubes
G.Re
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Default Fisher 30-A amp

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/derekv...n/photostream/

A later (or earlier?) 30-A version has no grid resistors, also no balance
circuit for the phase inverter.

 




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