So, like, post a sign "no pirate radio broadcasting plz"? Or show how it's in the lease agreement that it's against the rules?
Sounds like it. I’ve never broadcast over radio so I’m not sure how easy it would be to hide but that seems to be an important factor. It might come down to surprise inspections but those still usually have minimum 24 hours’ notice, at least where I live.
Your only hope is to set up an unattended transmitter, connect to it through the internet, and spend your effort obscuring that connection. Creating an untraceable connection through the internet is a lot simpler.
Aside: you could actually obscure the location of your transmitter by building multiple of them and doing some tricks with phase and frequency. Ultimately you're still trying to hide a guy in a crowd screaming into a megaphone. They'll find you eventually, you can only make it harder for them.
A reasonable analogy is to think of the antenna as a lightbulb that either changes color quickly or changes brightness quickly to send a signal.
If you find yourself bathed in, say, green light, it's pretty easy to look around until you see the green lightbulb.
It's very nearly the same here except that radio waves are at a much lower frequency than visible light. If you see a signal at 14.313 MHz, you can swing an antenna around and walk in the strongest direction until you get to the source, modulo reflections and whatnot.
If they can't hide it, you can't, either.
Spread spectrum and/or frequency hopping.
> If they can't hide it, you can't, either.
The reason you can't hide it is because it's an FM modulated signal on an actual carrier frequency. It's designed to be received by cheap consumer radios in the clear.
...Can you elaborate on this? I'm quite curious.