Extend tube radio FM band above 100MHz without RF signal generator
Published at : 23 Dec 2025
Many German tube radios have an FM band that only goes up to 100MHz. So what happens if your favourite station is at 104 MHz? Well, with a load of RF equipment you can easily re-tune it or shift the band limits. But what happens if you don't have this equipment?
I decided to document my attempt to extend my FM band without all the stuff, using a very simple and cheap modern device. Hope it helps you.