I have a 1996 made in USA Blues Deville. It has seen its share of repairs through the years - of course jacks, plate resistors and electrolytics, but also more than one relay repair. It has gone out again and I've had it. I've always felt it to be a little too stiff & sterile which contributes to not wanting to fix it again. Ditching the circuit would leave me with at least the chassis, tubes, iron, enclosure and speakers. I am keen to try my hand at putting together my own circuit that uses these resources as much as possible but I really want to make the thing lean more to the compressing side of things than the Blues DeVille. The question in my mind is, what might be the right way to go about using the transformers to get there. After all, it has a honking 60 watt output transformer and the B+ in the original design is 471V according to the schematic. Where to go from there? Cathode bias on the power tubes came to mind, to emphasize compression but, how much lower would the plate voltage need to go? The example values on the RCA data sheet for 6L6GC is based on 300V plate voltage. Where to find out what is the upper limit for that? I suppose zener diodes before the B+ node could knock the voltage down but how far can one take that in reality? All of the above is just about voltages and if I go changing that radically I will have to consider the load placed on the output tubes by the OT & speakers. I've got a lot to think about but thought I would put the voltage question out here to see what the community has to say. Thanks in advance!