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Well I'm not sure about the volume control and whether or not its original or not because its the same exact volume control pot as what's in my Philco 116B which is from 1936 and unfortunately it has developed the same "sticking" power switch issue as the power switch on my Philco 116B has.
The volume control/power switch pot on this radio is a CTS (Central Telephone System) Type T Power Switch/Volume Control Pot, which seems seems to be a trouble proned volume control/power switch pot, because actually come to think of it this humming issue is exactly what my Philco 116B did which I thought it was bad filter caps but now thinking upon it I'm now wondering if it wasn't maybe a bad volume control pot, which I'm now wondering if that's not the case here...
CTS by the way has a plant in Elkhart, Indiana which is not too far from where I live, which is actually where the two aforementioned pots were made.
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