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This Post Has Been Edited by the Author
In Reply to: RE: FS-100 Output Wiring posted by Gordon Rankin on January 03, 2022 at 13:45:57
I'll probably just connect feedback to the hot end of the 4Ω winding and call it good. I'm not sure the specific method I'm using for switching can even accommodate another connection switchable NFB. I originally used a 3P rotary switch, but I'm changing to the octal plug for more secure connectivity. An 11 pin plug and socket would probably work for switching NFB, but I don't think this approach is materially better than using the 4Ω tap throughout.
I'm making multiple upgrades to these amps, enough to warrant tearing them down completely. Output switching is actually one of the smaller issues. I have also designed a simple auto-bias circuit to stabilize current drift in the A2 driver and will be making a few additional changes to the power supplies.
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