F-50 bias mod - schematic included

[tommy d]

I wanted to make the bias adjustable. Is the resistor I need to downsize and add a serial cermet pot the 56k on the left side of the by the "FB"

[Pedro Vecino]

No. This resistor is part of the feedback circuit. You need to adjust this:

[tommy d]

(Remove egg from face) Thanks a bunch! I was quite perplexed by the ten page schematic!