Microwaves are uncharted waters to me, esp when it comes to amplifiers like this.
I am very new to this as well, I just spend lots of time in this stupid computer, playing catch up now I have time on my hands. If you have the mod sheet for the amplifier then the sites I read up, are mentioned in the mod pages. The first one I saw done with James Smith when he also posted on Facebook about it and G4WIM also did his before I did mine. My aim was to keep everything under the screening lid hence the reason behind my mods and going through the bias circuit. I would love to have a way to program the variable electronic potentiometer IC on the board that is doing the biasing, but I do not understand enough of that yet.