03-03-2019, 03:32 PM
Bridge rectifiers can and do fail all by themselves.
For testing purposes, any old bridge or just a bunch of 1N400X diodes could be tried - current rating is not an issue if you're using a lamp limiter.
Alternatively, a dual bench power supply with current limiting can be used to test the rest of the amplifier minus the rectifier - a standard dual 30V/1A unit would be more than adequate, and is surely a standard item in any repair workshop? (If not, I can sell you one). This is actually what I would have done first of all.
There is no PL30, so I assume you mean PL3. If we also assume that you didn't accidentally disturb that connection, then that means someone else has been there before you got it. So who knows what other horrors await you? Hopfully the rectifier did die of natural causes...
For testing purposes, any old bridge or just a bunch of 1N400X diodes could be tried - current rating is not an issue if you're using a lamp limiter.
Alternatively, a dual bench power supply with current limiting can be used to test the rest of the amplifier minus the rectifier - a standard dual 30V/1A unit would be more than adequate, and is surely a standard item in any repair workshop? (If not, I can sell you one). This is actually what I would have done first of all.
There is no PL30, so I assume you mean PL3. If we also assume that you didn't accidentally disturb that connection, then that means someone else has been there before you got it. So who knows what other horrors await you? Hopfully the rectifier did die of natural causes...
