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RE: 26 tube filament ripple

Ben, I do not get it. Float the filament DC power (no reference to ground) and provide +9 volts from one side of filament & negative to the ground bus?

Or, are you saying provide 10.5 VDC + to one side of filament and other side of filament gets a dropping resistor to ground. The - from the 10.5 volt filament power supply goes to ground. The dropping resistor dissipates 9 volts.

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