Trouble locating bias resistor

[pine]

Can anyone show me a picture of where the bias resistor is on a Mesa Lone Star? I have the damndest time reading a printed circuit board.

[stokes]

If you trace the blue/red wire from the PT to the board it will lead you to your bias circuit.

[Enzo]

And what exactly do you mean by "the" bias resistor?

[pine]

And what exactly do you mean by "the" bias resistor?

I mean the resistor that Mesa puts in so that the bias current is always the same; I want to put in a trimpot as Stokes has done to get an adjustable bias and thus have a fighting chance at getting power tube distortion out of a Mesa