Hello everyone and thanks in advance for any help you can provide. I recently finished a Princeton reverb build that someone else started but they were unable to finish. I've got the amp done for the most part but it has an issue where the reverb knob is acting almost as a master volume as well as a reverb control. It does this with or without a reverb tank hooked up. I have checked for bad grounds as well as grounds that shouldn't be there.I have checked coupling caps around that part of the circuit and I have tried multiple tubes etc... Voltages all seem to be pretty much in line with what they should be (allbeit a touch low). If anyone has any suggestions I'm all ears.