Hey guys! I have a 1962 Guild 98RT, which is known to be a very close clone, even down to the cabinet and control panel, to original first generation Ampeg Reverberockets. I'm not very familiar with how the capacitance driven reverb works at all, and I would love some help, as I'm trying to see what individual components could be suspect with my issue. A high quality image of the original schematic from inside the amp is included in this post. My main issue is noisy reverb. It seems to be a white noise or hiss or static or something of the like. No hum. It's only present when the reverb is switched on, and it's volume varies with the reverb control, but not with the volume control, and it is unaffected by the tone control. It is at a pretty unacceptable level of noise and I'd like to see if any of you could help me. I suspect it to be one of the 3.3k resistors or the .01 capacitor on the output of the reverb tank. Do you think this is a good place to start? On another note, I'm getting a scratch type sound when switching on the tremolo. I suspect there may be DC on the switch or perhaps it needs to be cleaned. Any tips? Thanks for the help everyone! Edit: another question: Why does it indicate that the 6SN7 used for send and return on the reverb had to be a selected tube. Could this be for noise reasons?