Hi all,
I'am Chris from Athens Greece,
Ι recently got an RM200 from my father, with electro harmonix 6550EH.
Ι tried to biasing the output tubes,
First i set the two bias control pot in zero position, right end position, in order to slowly increase up to 35mV per tube.
My problem is that the position (V5) LEFT TUBE, always run very high mV (from 80mV minimum to 105mV max) while the bias pot is at zero position , regardless of the tube, i true them all in this position.
I also check the 250mA fuses, it's all ok.
Do you have any idea please why this is happening?
Thanks in advance,
Chris