M
MYLILSS
Well-known member
i seem to have read somewhere that when converting a 5150/6505 head to el34, all that is needed is to ground pin 1 of the power tube socket closest to the power switch, upgrade the screen resistors to 1k-5W, and do a bias mod that allows you to get the el34's in range. is this all that has to be done ? has anyone else done this to there amps ?

