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Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Spivak on Saturday November 12, 2022 @02:20PM (#33576117)
That’s cool and all, but getting an amateur radio license would not have allowed me to do what I want legally anyway which is run a low power music FM station broadcasting to common radios in my own apartment. I do use a filter but it wouldn’t matter if I didn’t, I don’t really care that I’m splattering the spectrum when the broadcast doesn’t even make it through my walls.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Joel_Mckay on Saturday November 12, 2022 @02:29PM (#33576214)
If I recall, license free 88.7MHz under 15mW transmitters for FM audio were very common in some zones.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by fest on Saturday November 12, 2022 @04:03PM (#33577049)
I believe the EU limit is 50nW (at least it is in the EU country I live).
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Johnythree on Saturday November 12, 2022 @04:19PM (#33577203)
> when the broadcast doesn’t even make it through my walls.

But you don't know. If it's radiating a few milliwatts (or even microwatts), that's sufficient signal to be hear across town in a sensitive receiver.

The really sad thing is that the unwanted signals could well be stronger than the unwanted one due to unwanted resonances in the antenna wire, etc.