[Arran]

Peter;
  I believe that one of the sets he did this to was a Belarus 57, which I would not alter if I had one, it looks like the scale for FM was very small, in fact it took me a while of watching videos with them to notice that the FM scale was not in parallel with the SW, LW, and MW scales but ran vertically along one side. I was disappointed that nobody seemed interested in demonstrating anything other then FM reception given that they have a tuned RF amplifier stage, so would probably perform well on shortwave. I would think that a low powered RF transmitter tuned to the 65.7-76 mc/mhz OIRT FM band would probably work just as well. As I mentioned I remembered that the FM band on the Chaika set would pick up the audio channel of one or more analog TV station when I was in Edmonton, Alberta, and the tuning was somewhat broad. One day I will have to restore the Chaika, I can't really remember why I stopped using it, if the date codes are correct it was manufactured in 1966 or 1967, the only alteration I made was in connecting the speakers so they could be unplugged to pull the chassis out. 
Regards
Arran