[Arran]

I've seen a sort of trend on Y.T where they add an FM conversion module to a tube based AM broadcast radio. To be fair these guys are in Australia, and I don't think they had FM broadcasts there until the late 1960s, so the only vintage radios they have with FM on them are imports, either from Europe, or Britain. I have some tube based FM tube sets, one being a Stromberg Carlson of about 1950 vintage, one is a Packard Bell of around 1958, a Japanese tuner from the early 60s (possibly), two German sets, and one Austrian one with a seized FM tuner. I'm not counting the Soviet Chaika radio-phono combo, it has FM but it's the OIRT band, which isn't much better then having a set with the prewar FM band, though tweaking some component values could make it track high enough to pick up the 88-108 FM band. Even so the programing on FM isn't really that much better then AM broadcast here, I can't picture adding a convertor module to a vintage set, I also don't see the point in Bluetooth modules either.
Regards
Arran