bf pr rev high plate voltage

[scole]

here we go again, seems like every amp i build has wicked high plate voltage. this one (an aa1164) has 470v at .04 ma. i changed to a russian 5y3 (wich really isnt a 5y3), im down to 460v. if i put a nos 5y3 ill probably be at 450-455. so do i just re bias? or find tubes that can handle the voltage?

[Enzo]

Are the tubes in it while you take these readings? AMp power supplies will read higher when the tubes are not installed.

[scole]

yes, tubes are in. i just tried a new set of messa 6v6's, one reads 34ma the other is 14. guess ill go back to the fender/russian 6v6's.

[scole]

i put in a russian 5u4. i get 422 plate volts with russian 6v6's at 28ma. i put in an nos rca 5u4, 414v at 24ma, changed to tung sol 6v6's (current production) i get 413v at 26ma. i think im done.