B52 AT100 Bias prob

[groovtubin]

Picked up one for $150 from a friend, in VERY good condition.... Was getting @ 49 volts at grids..... tried biasing per some utube guys way X the TUBE FUSE.... MISTAKE,  was getting the full B+ ( 480) X the tube fuse, ( tht it had been modified!)  even tho the AMP was playing FINE altho HOT HOT HOT....  tried RAISING NEGATIVE voltage n the bias pot FELL apart  it was gone alredi!  Pulled board  drilled hole for a very nice 10K pot that fit right beside the PS Board,  The 110 ohm resistor for cathode bias fell OUT on one side when i pulled board upside down 4 repair !  Repaired that wired up the bias pot  ran a 27K vs (22k)  Its maxed OUT at 52 volts but sounds GREAT n running VERY VERY cool......n sounds VERY  good n VERY warm even on SS setting, ( wasnt B4 more metally lol) Im PULLING the rectifier tube it sounds AWSM in SS mode now  FAR better than B4!  Bias was just all amuck...n NO wonder the guy who had it b4 me was running in Tube rectifier mode lowering B+ to 423 vs 480 SS!  :) Tryg ta SAVED the tubes lol....