Biased

[rollo]

Thanks.   Sometimes more brightness is needed, on amps with cheap slow OPT, for instance.

 Si senor. A great tone control. either way. I don't mind the bright as long as it is NOT thin. gotta have the meat on the bone. 


charles

[Listens2tubes]

My Dynaco MkIV's have micro adjust bias pots also. They were tempermental with bias setting until I installed new tube sockets (teflon) and GEC KT77 re-issues in them. Now, once warm, they almost never need re-biasing. 


I used to bias at 1.56VDC and would know when the bias had climbed to 1.62 when the highs hardened. I now set to 1.25VDC. That said, I did test different bias settings for sound and found only the higher setting to affect performance.