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Federal Signal PA-20A

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Uploaded by on May 30, 2008

Federal Signal PA-20A Siren w/In-Between Tones from the 1970's, If you Turn the Selector knob Between Wail & Yelp & Yelp & HI LO You get some wierd tones, the HI-LO Has been altered to do the ALERT tone instead. Enjoy!

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Autos & Vehicles

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Uploader Comments (GUYM3065)

  • Back in the early 80's my father was a local Fire Chief with this exact siren. And of course...he was producing those same sounds for the mid-positions between Wail & Yelp. He named one of them the "Screamer" whether this was just him or a known name I will never know

  • @murthad02 Never heard it called that.

  • It was like that when I got it.

  • Hello PolizeiPaul, I don't know about chicago but I used to hear it a lot in the 60's and the 70's growing up in New York. All you have to do to get that tone fron it is put the selector switch between Wail & Yelp.

  • this siren was used on emergency! in squad 51. and i think it was in the engine too

  • It is the same one from Squad 51 but not the same as the one from Enging 51. Engine 51 had a Federal Signal Q Mechanical siren.

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All Comments (53)

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  • the in between on the yelp sounds like a powercall plus aka 6 adam!

  • It looks like a North American Signal Master SI-M doesn't it a little!

  • @GUYM3065 This siren was shown in the original Engine 51 (the Crown) but on the show, they played an old style mechanical siren every time the Crown responded.

  • They were called - inter-tones, they were made because the circuitry had a " make-before-break" type of switch, it combined circuits on the board. It was like playing a synthesizer while going down the road... your partner concentrated in driving, you made the music to clear the way !!!

  • Last part was the best lol

  • @GUYM3065 Also used in the Blues Brothers Movie!

  • You need to get dog dog kitty kitty going on it

  • Lol the hi lo reconfiguration sounds like pager tones..

  • Right at :32 is that high pitched yelp used by Chicago PD in the movie "The Blues Brothers" Chicago chase scene. Though the movie cars mixed a duotone siren for theatrical effect; that high pitched yelp and wail.

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