33ma vs 35ma bias
Posted:
Wed Apr 13, 2011 4:46 pmby barry robin
i just swapped out my driver tubes and when i checked my bias pots it seems that all the measurements are now at 33ma. it was suggested that i keep them there instead of running them at the standard 35ma. why? any advantage to this?
-b
Posted:
Wed Apr 13, 2011 9:09 pmby EWBrown
The sound quality difference between 33 and 35 mA won't be noticeable. And the slightly lower current will let your EL84s live a while longer.
If these are new unused tubes the current value will drift a small amount during the first few hours' operation.
HTH
/ed B in NC