He's using almost 150 semiconductor diodes, isn't that sort of cheating ?
He's also using fairly modern (TO-5 can size) trim-pots to tweak each
stage. A true vintage unit would have used 3/8" hole, 1/4" shaft (or
their metric equivalent) style pots, or else hand-tweak the resistors
either by swapping parts or grinding carbon resistors with a Dremel tool.
Tom
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