09-11-2026, 02:41 AM
Rob;
I'm thinking it could be bad printing or a drafting error as the RCA 911K shows a similar control, with tap, with the wiper connected directly to the grid of a 6F5, but it clearly shows a shielded cable, a ring with a ground symbol, not a black dot with a ground. It's a good thing Murf was asking about the volume rather then the tone control, replacing that would be much more complicated as it appears to have a double pole, double throw switch on it for the variable IF bandwidth. It's a cool feature but combining it with a tone control is kind of goofy, most sets like that had a "fidelity" control which was separate.
Regards
Arran
I'm thinking it could be bad printing or a drafting error as the RCA 911K shows a similar control, with tap, with the wiper connected directly to the grid of a 6F5, but it clearly shows a shielded cable, a ring with a ground symbol, not a black dot with a ground. It's a good thing Murf was asking about the volume rather then the tone control, replacing that would be much more complicated as it appears to have a double pole, double throw switch on it for the variable IF bandwidth. It's a cool feature but combining it with a tone control is kind of goofy, most sets like that had a "fidelity" control which was separate.
Regards
Arran
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