Quote:
Originally Posted by Yamamaya42
The only thing that makes sense to me to raise positive bias is to remove the 25z6 and replace with one1n4007 , leave the heater connected, and wire in the diode from the 10 ohm resistor on the plates to the 40 UF / spkr field coil, making sure to keep the cathodes p 4/8 unhooked.
This will raise the B+ by a lot, but may also have an effect on the negative bias.
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Well I would have watch the voltage that it don’t exceed the caps rating in there already and there is a resistor already in there to take the place of the field coil. Why not just pull the tube out and put a resistor in place for the heater