Re: circuit diagrams.
The simplest circuits can be worked out just by looking but a proper circuit diagram is always a big help. Given sufficient time and perseverance it's perfectly possible to trace out circuits which are as simple as most valve amps are (this is much tougher for, say, the more sophisticated military equipment though). The hardest items might be potted transformers (plain tins with a bunch of leads coming out) but even these can be diagnosed with experience and a bit of basic measurement. And if you should come across any components you don't recognise then I would bet that the expertise available on this forum would be second to none (and I do mean none) in helping you identify them. One thing you don't get when you trace the circuit yourself though is the very handy operating voltages which are often included on the manufacturer's version.
Any info about the amp (make and model would be best) would give us a good start and a few pictures, inside and out, would be great too. If you decide in the end not to trace it yourself then you can probably find folks on here who will sort the amp out for you for a very reasonable sum.
Cheers,
GJ
|