RE: Biasing

Tubes Asylum

Questions about tubes and gear that glows. FAQ

In Reply to: Biasing posted by itolduso1000timesb4 on May 31, 2023 at 04:22:13:

Preamp tubes use self-bias - no adjustment needed. They operate at a small fraction of their power rating and signal voltage, so small deviations from optimum are insignificant.

Power tubes can use self-bias, but most can deliver more power using "fixed" bias (which is usually adjustable...). Since the operating point of power tubes affects power output, distortion and tube life, having an adjustment allows the stage to be optimized despite variations in individual tubes.

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Follow Ups Full Thread

Topic - Biasing - itolduso1000timesb4 04:22:13 05/31/23 (3)

RE: Biasing - 6bq5 13:09:10 06/1/23 (0)

RE: Biasing - Tom Bavis 06/1/2307:52:35 06/1/23 (0)

RE: Biasi - Ian L 06:32:02 05/31/23 (0)

Follow Ups

RE: Biasing - Tom Bavis 06/1/2307:52:35 06/1/23 (0)

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