Fisher 400 rebuild

[Thom 2230]

Fisher 400 rebuild and related topics.

 

[Migueldajer]

Bias real time monitoring. As mods are made on the fisher 400 I always wanted to be able to check the bias without having to open the amp, in real time. this posting shows the mod and design done to achieve this goal. It works better than I expected and provides real time monitoring of the output tubes on the amp. code is also provided for your use. Happy to provide more information, please drop a line or comment.