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The grounding scheme can easily be changed by adding or removing a little blob of solder on that little PCB that the phono jack is mounted on (if they're still making them like that).
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Back in the olden days before there was a multi character code system for Accutronics tanks, Hammond/Gibbs basically made two types of tanks, "F" and "C".
Type F tanks were used in applications that were driven by a low impedance source such as a transformer output stage and the type C tanks were driven by a high impedance source such as direct from a tube.
I have never seen an authoritative reference to what the F and C stood for, but I was once told by a supplier that the F was for Fender and C was for capacitor, referring to the capacitor coupling to drive the tank. All I know is that C tanks came in some but not all Ampegs, Gibsons and Valco amps. And F tanks were used by every Fender amp made until the early 1970's.
As far as I remember, the early tanks were all made the same way with no specific mounting or other physical restrictions.Comment
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