Bias Adjustment

[adydula]

After several months I chceked the bias and both sides were at 149 VDC.
I adjusted a few turns and set them back to the nominal 145 VDC.

So whats this indicating about the tube wear?

Alex

 

[Paul Birkeland]

It may indicate burn-in more than anything. 

 

[adydula]

I agree....nothing to really be concerned about.

It would be a neat excercise to plot the voltage change over time and see how that looks....

Nah...life is too short!!

Thanks Paul....listening with the Mainline, its superb!

Alex

 

[raymondp1138]

The good news is I don't notice any change in sound quality from this bias drift. I'm happy there's the ability to adjust bias though.