[Bill Kinghorn]

I guess it's just the desire to leave as much alone as I can. I have never restored a radio for sale and don't see them being used extensively. If the insulation on chassis wiring is embrittled but hasn't crumbled, I don't disturb it. I replace paper caps which, if shorted, could quickly burnout a power or output transformer. ...three at most. I have never seen a circuit where a shorted paper cap could burnout an IF xformer, rf, or osc coil. Shorted caps beyond the speaker field will disable the radio and heat the field but not ruin anything. Many paper caps are in low-voltage, low impedance circuits, like cathode bybass, where neither leakage nor exact value matters. I look for leakage in audio coupling caps by checking for significant disruption in grid voltage. If it is not important I leave them alone. If they deteriorate it will be noticed as audio distortion. If a resistor is importantly wrong in value, that can be seen as an importantly wrong voltage somewhere. I'd never disconnect one to measure it. If components need changing, I don't seek exact-value replacements when modern components can improve the circuit. But I don't like Model A's with V8 engines. Model A's with a few parts missing are OK by me if they run good.