Re: Test equipment for valve radio repair
A cheap DMM is really all you need. This will measure voltage, current and resistance. You can't test valve radio capacitors easily even with sophisticated capacitance meters because of their typical failure modes, so the best method of finding bad ones is to look for voltages where there shouldn't be any with the DMM.
An RF signal generator is useful for AM alignment, but you can do just as good a job with care using off-air signals. A wobbulator and scope is really needed for accurate FM alignment but it's possible to check the ratio discriminator alignment with just the DMM - many professionals wouldn't have owned a wobbulator back in the 50s, and that's how they would have done it.
Paul
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