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In Reply to: RE: 100K ? posted by banpuku on February 22, 2017 at 13:29:23
Well you would select that resistor value the same way as with a centertap transformer. Then add the "pot" resistance divided by two. But as the pot resistance is so low, like 100ohms, you could ignore it in your calculation.
Follow Ups:
So, in my case, I would end up with 1000 ohm resistor on each leg of the filament supply (ignoring the pot resistance). I have some wirewound 1k resistors that should suffice. Thanks!
No I would still use a pot or two low ohm resistors to form a centertap.
Though I have little practical SE experience, I would expect hum problems if you stray from conventional practice.
And consider how you would handle the cathode bypass cap with two resistors? Use half the cap value on each side?
Make the cathode resistor whatever value it needs to be to properly bias the tube.
Tre'
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