There's modulators in Sarnia, ON. in the rail yard that tests in whoop.
Find some more sirens that are doing odd tones that you've probably never heard. The tones can also be custom.
yes! I believe these use an old police/emergency vehicle siren box as their tone generator/amplifier. very simple but cheap, and reasonable for a town with an extremely small budget. the sirens are home-built as well.NotVoyager wrote: ↑Mon Jan 03, 2022 9:21 pmA while back, I saw a siren called a “Custer Electronic Siren”. It did a Fire (High-low) signal, but winded down and then did the signal instead of winding up. A strange siren to me.
Also, the siren is homemade from what I have heard. I don’t know if this is true, but I’ll take my guesses.
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