Okay, the reverb has ceased functioning on my amp. These are the symptoms: Audio is still coming through the amp as if the reverb were simply turned off. When I turn the reverb up the background hiss increases When I tap the springs I get the reverb effect, that "kicked combo" effect so there's obvious a signal from the tray. There are no visible problems with the tray and I have checked the amp tubes also. It has been suggested that the tranducer(s) themselves could be faulty. Anyway, what are the general causes for this sort of problem and should I be looking out for any other amp signals that it could be a deeper problem? Also, am I ok to run the amp with the tray disconnected? It seems to run ok but I don't want to damage it by doing this longterm if this is a nono area. Thanks.