Re: circuit diagrams.
A well-drawn circuit diagram is a great help.
The average 5-valve superhet is quite possible to repair without (although when a dozen or more wires terminate on a wave-change switch, I find myself hoping that the fault is somewhere else). And as GrimJosef comments, wires disappearing into a tin box can be baffling - especially if originating from a metallised valve that the pinout details aren't available for (pardon the grammar).
Of course, if the Phantom Fiddler has got there first and made a few modifications, then without the 'proper' circuit diagram, the challenge is very much increased!
|