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RE: Njoe Tjoeb 6922 voltages

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This Post Has Been Edited by the Author

In Reply to: RE: Njoe Tjoeb 6922 voltages posted by shermanr@prw.net on October 20, 2008 at 07:30:26

With the cathode voltage and the cathode resistor value you can determine the operating point. A look at the plate curves and you can judge for yourself if it's a good, linear operating point. If it's not, change it.
Without knowing how much current is flowing through the tubes, I would still guess those operating points are not the best.
I would run those tubes at 150 volts plate at 8 or 9ma. An active plate load (plate choke or CCS) and a high following stage grid resistor value to give a horizontal load line.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

plate curves (Open in New Window)

Edits: 10/22/08

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