tube amplifier auto bias- accurate?

Eldartford,
In my opinion you are one of the most knowledgeable here on tube amps and often find myself silently nodding my head to your conclusions. You have provided excellent insight to both the novice and expert. I agree to your last sentence in this thread…So which way would you rather have your tube's biased? :-)

Bin, please see my comments above, which is my opinion of Eldartford being "one of the most knowledgeable here on tube amps".

I'd rather have auto bias. I don't have the time or the patience to do it any other way. I have an amp that I turn on and play music, end of story.

A question on auto bias. When would an amp perform said biasing? Unless it was a real smart implementation, seemingly auto biasing would be active all the time the amp is on, that is even when music is being played. Wouldn't that have a negative impact on the music?

Tubes108...In military equipment that I worked on we had a similar situation.... we were adjusting amplitude and phase of an AC power supply to account for variables of the load. The way to do it is to run the adjustment process until the parameter you are adjusting is within some tolerance, (and then a little longer so you don't always get hung up ON that tolerance). Then, quit the adjustment process unless the parameter drifts outside of a larger tolerance. In other words, introduce "hysteresis".

This is how automatic tube bias adjustment onbviously ought to be done, but...? Does anyone know the actual details?