Hey all, I just built a 5D3 type amp with one channel, in a Harvard chassis, you might have seen my recent thread on it. It turned out great and I'm really happy with how it sounds and responds to my playing, but its getting a bit hot after an hour or two of playing. Actually, the top of the chassis and the PT get quite hot. The details: The tubes are 6AT6, 12AX7, 2x6V6 (current Gold Lion), NOS 5Y3 The PT is from Victoria, the same one they use for their 5E3 builds I subbed the first dropping resistor for a filter choke The second dropping resistor is 22k in this amp 470 Ohm screen resistors The 6V6 cathode resistor is 270 Ohms The first thing I'm thinking is that maybe I shouldn't have used a choke, as the inductive reactance is way lower than the 10k resistor that's normally in its place. Would you swap it out for the 10k resistor called for in the 5D3 schematic as a first step to managing this? Or, if the voltages are good in the preamp, up the value of the cathode resistor?