[Arran]

Mike and Peter may be interested in this, I obviously can't understand what this gentleman is saying but I think I understand the theory of changing capacitor values in the local oscillator tank circuit for FM, though how well this works with the stock coils I don't know. I am not about to try this on either of my USSR built sets, as I can recall when I had the Chaika running it would pick up the audio for one of the local, over the air, analog TV channels in the Edmonton area, but since I have enough sets that have the 88-108 MC FM band on them there isn't any reason to modify the Soviet ones. By the way, did they have to pay royalties to Armstrong's estate when the started building FM sets in the USSR?  
  I am actually surprised how many Y.T channels involve radio and TV restoration in that part of the world, and they apparently have a lot of views. I had assumed that they were still broadcasting on the Soviet era FM band but maybe the selection isn't as good?
Regards
Arran


https://www.youtube.com/watch?v=EcAhdGJHKN8

[morzh]

I doubt they paid or pay any royalties to anyone for anything.
RCA caught them red-handed, so they caved in - at the time they needed US help in building the industry.
This said, even though the first 1kW at 46.5MHz UKV (FM) station was built in 1946, im earnest they started using it in 50s. They had their own group of engineers who experimengted with it since 1920s.
And when the real FM went into effect, in 1990s, well...patents do not last long.