Hello all. Quick question for the gurus. I have an intermittent voltage issue that’s been plaguing me on and off for a while now on my Blackface Twin build. I see a plate voltage of 5-10VDC on start up with power tubes in, which jumps to the 100V or so range with a hard strum, which sounds like a farty, distorted sound. Zero-volt plate reading with power tubes out. If it sits long enough, boom, plate voltage shoots to 480V and the sound comes rushing back. Biased to 38ma (which obviously reads zero when voltage issues are present), but goes right back to 38ma when the problem goes away. I remember having a similar issue when dealing with bias resistors on the build. Does that sound like a possible culprit? Would a shorted bias resistor send the entire rectified voltage to gnd and kill the power at the plate? Full disclosure, it just got to the point that I couldn’t take it last night, so I have yet to pull the chassis at check B+ around the board, check the transformer output, etc. I’ll break her open this afternoon, but wanted to give some time for the question to simmer before I did. Cheers!