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RE: 26 tube filament ripple

"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."

Yes, this is what I meant. The resistor goes to ground along with the supply negative. Sorry if I was not clear.

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