[RadioSvit]

As for the bad contact in the switch - that's what I wanted to tell you, but I saw your post late. In Soviet radio, these contacts are often oxidized and therefore it is useful to cover them with antioxidant and protective lubricant

In most Soviet radios, the contours were filled with wax, but sometimes they were fixed with paint. If you used wax in your radio, then you are very lucky - just heat the core a little with a soldering iron and you can easily turn it with a screwdriver. But if the core is fixed with paint, then you have to use solvents, otherwise you can destroy it - the ferrite core can split.

PS.
The need to adjust the cores of the contours may indicate that the cores from old age have not only changed their intuitiveness, but also strength. So be very careful, Brenda, most likely they have become very fragile.