(Redirecting a previous thread) Last year I built a Weber 6a14HP, which is a 35 watt Princeton Reverb. I wanted to try dialing it back to the original 14 watts, so I bought an OT spec'd from the original 6a14 kit. The PT was the same, just needed different taps. The bias resistors were a little different, so I changed them. Swapped the 6l6 tubes for 6v6. Finally there was an extra filter cap attached to the cap can. I can't find any other differences. Did the work yesterday, but no sound. While chopsticking and checking voltages, the tremolo started to thump really hard. I found that with the thump a brief instant of guitar sound would come through. Other than that, nothing. My B+ with the bias pot as hot as it will go is 379v, pretty low. Comparing bias resistor values to RobRob's layout, I found the values to be different than the Weber layout. Might that be the issue? Where to go next? I've included the 6a14 which is the target layout I'm working towards. Then the 6a14HP layout, which is where I began with and worked fine, just stupid loud. Then Rob's layout, for reference.