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by quickthrower2 1284 days ago
Tunnels near me just say "Turn on your radio" and blast the whole FM spectrum at least (might try it with AM too!). Guess you can do this in a tunnel!
1 comments
RF_Enthusiast 1284 days ago
Fun fact! In the US, a Tunnel Radio System may operate in any mode on any frequency provided the signal does not leak from the tunnel[1].

[1] 47 CFR 15.211 <https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A...>

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