In Reply to: Adjustable cathode bias posted by Frihed89 on November 2, 2015 at 13:49:13:
As mentioned, a switch is the best way to do this. The resistor (pot) would need to be a biggish variac-style variable resistor with heavy duty windings, and it's not going to be as quiet as a "real" switched resistor solution.
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Follow Ups
- RE: Adjustable cathode bias - Ed Sawyer 09:24:20 11/09/15 (0)