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Dunno if this is actually radio related, but thought this community might know something about it.

I was walking down a stretch of railroad that I haven't explored before when I happened across this metal sign nailed down to the tracks.

It's pointing toward the nearest railroad crossing and says "790Hz". Is this a radio frequency one could listen on and hear when the train is passing by? Or something else? I don't know anything about trains

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[-] TropicalDingdong@lemmy.world 2 points 3 weeks ago

Did you tune in?

this post was submitted on 11 Apr 2026
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Amateur Radio

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