Hi all, I'm hoping someone could help me out here. I've got a Selmer Vanguard amplifier that I'm trying to resurrect. Since I've had it, the reverb has never worked correctly. When I engage the reverb circuit I get a tiny bit of verb, then if I turn it up it starts oscillating and humming. I've tried the normal stuff: - flipping the tank 180 degrees - isolating the springs - replaced both the reverb driver tube and the ECC83 recovery tube Finally I suspect the reverb transformer to be the issue. With the amp on I'm measuring only about 2V on the primary, so it looks like that's the problem. So here is my question. The schematic has no information on the transformer other than its marked "T-215" The actual transformer in the amp is marked "T-188". Does anyone know what I can use as a replacement? Unfortunately since it is not working properly I can't get accurate measurements on it. Here is a link to the schematic http://www.vintagehofner.co.uk/britamps/selmer/schematic/vang.html Any help at all is appreciated.