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I have one like the captains but with brown knobs and diamond pattern. It's a 1951 but the propeller dial ones posted above were made over several and I have 2 about 1955 vintage.
Normally, I change the selenium rectifier to a 400 PRV diode rect and add a 300 ohm 3 watt to compensate for the selenium's voltage drop, the schematic shows 130 volts.
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"When resistors increase in value, they're worthless"
-Dave G
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