Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: BrainDeadAmps on November 01, 2022, 01:56:17 pm
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Hey guys,
I rebuilt an old projector amp and lifted the phase inverter circuit from "the howler monkey" designed by F. Cook.
It works but seeing that my amp has a higher Ht voltage I'd like to bump up the ht supply from 225 to 250 in order to raise the voltage of the preamp.
I get lost trying to come up with the modifications needed mathmatically.
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What are the voltage values at each filter cap now?
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What are the voltage values at each filter cap now?
This is the circuit in it's current state.
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Experiment with the last two dropping resistors until you have what you want.
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Bumped it up to 250 and sounds great, thanks Sluckey.