Rca 811k info

[dieseljeep]

Originally Posted by TomRhoads

I am restoring a model 811K RCA console radiocirca 1937 .Would like to have information about the fine tuning for the stations My radfio does not have the knob and there is no shaft for it also.The coarse tuning tuning knob andshaft are there,and connected to the variable cap,but I cant tell whatwas used to have fine tuning in the inside of the shaft.Pleasehelp with info ,thanks.

Is there two knobs on the tuner shaft? An outer and inner knob? If so, the tuning cap has a vernier drive on it.
Usually, if there's no reduction of turns, by using the center knob, it means that the grease is all gummed up and preventing the drive from working properly.