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I'm just curious--are there actual *names* for the different component value systems you run into when working on vintage amps?
For example, some older amps have 50k, 75k, or 200k resistors rather than 47k (or 56k), 68k, or 220k. Capacitors go from 0.25uF to 0.22uF and 0.05uF to 0.047uF, etc...
It seems to me that the transition occurs gradually between the second half of the 1940s to around 1960, with resistors changing first.
For example, some older amps have 50k, 75k, or 200k resistors rather than 47k (or 56k), 68k, or 220k. Capacitors go from 0.25uF to 0.22uF and 0.05uF to 0.047uF, etc...
It seems to me that the transition occurs gradually between the second half of the 1940s to around 1960, with resistors changing first.
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