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Hi there, I've got a nice little late '60s Teisco practice amp called a 71-R, it's a 4 or 5W, 6" speaker all tube amp that I love except ever since I got it the reverb has never worked (hence the "R" of 71-_). It's an old amp and schematics don't exist for it so I'm kind of in the dark about what values should be running though the amp.
What I do know is that if I jiggle the amp I get reverb tank crashing but there doesn't seem to be any input making it into the reverb tank. I tried switching some tubes out to see if it was a tube problem but that didn't seem to be it.
What I'm wondering is how to go about troubleshooting for a reverb tank. Like how can I isolate if it's the tank's input or a driver problem, like the input transformer isn't putting out juice, how would I test the transformer?
I picked up a replacement tank and will try wiring the old input/output wires to RCA jacks and plugging it in tomorrow. But in case that doesn't work, and just because I'd like to know in more detail how things work down in that end of the amp, if someone could tell me the best way to pinpoint reverb tank problems, how to measure the respective values, etc. I'd be very grateful.
What I do know is that if I jiggle the amp I get reverb tank crashing but there doesn't seem to be any input making it into the reverb tank. I tried switching some tubes out to see if it was a tube problem but that didn't seem to be it.
What I'm wondering is how to go about troubleshooting for a reverb tank. Like how can I isolate if it's the tank's input or a driver problem, like the input transformer isn't putting out juice, how would I test the transformer?
I picked up a replacement tank and will try wiring the old input/output wires to RCA jacks and plugging it in tomorrow. But in case that doesn't work, and just because I'd like to know in more detail how things work down in that end of the amp, if someone could tell me the best way to pinpoint reverb tank problems, how to measure the respective values, etc. I'd be very grateful.
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