What is the black knob and what is its function?
There is a red arrow pointing to it.
Ancient? I resemble that remark!
An anti-skate adjustment would likely be right on the tonearm pivot. It's about the right size to be a 45 RPM spindle adapter, though.
If it's truly a control knob, I'd bet that it's the speed selector: 33 1/3 vs. 45 RPM.
It's not the speed selector - that is the first slide switch; also not a 45 adapter...........there's a youtube video that shows the turntable and explains what functions are on it - but it's not in English....
It looks like the anti skate adjustment. Anti skate is what keeps the tone arm from skipping across the record. It's needed because when a tone arm is adjusted properly it's barely putting any weight on the stylus.
That is an adaptor for playing 45 RPM records, which has a larger center hole than the 33s. Place it on the spindle, set your speed.
This is an ancient pick up, from about 1980
What is the black knob and what is its function?
There is a red arrow pointing to it.
