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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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