Re: Projector valve amp trouble.
Do you have a reason to believe it's the rectifier or the capacitors ?
The right approach is first to identify the fault which is causing the symptoms (loss of output) and then to fix it.
The best way to identify the fault (assuming some component isn't obviously scorched or exploded or broken) is to measure DC voltages at various places in the circuit and to compare the measured values with what they should be, either read from a service sheet for the amp if you have one or by asking on here (we can help you work out the correct values). This will identify where the fault is occurring and save you from wasting time and money changing things which aren't broken.
Cheers,
GJ
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