The Siren Board

Here is some siren info I have on the ones I have.

Siren Type Federal 2T22B 1976
Volatge: 220V 50/60hz
Phase: 1
Type: Repulsion Start Pepulsion Run
Dual Sharft Motor
Motor Frame#: 254
Amp: 56
HP: 10
RPM 3450
Motor Maker: Northwestern Electric
Slip Type: Low Slip
Rotors 2-single tone 1-10port 1-12 port mounted opaset ends to make Dual tone
Rotor W-15 inchs
Rotor H-6 inchs
Siren Maker Federal signal corp

STL 1950's
Voltage: Dual 220V/480V
Motor type: Induction
Motor Frame: # 254
Single Shaft
Amp: 100/50
HP 15
RPM: 3450
Motor Maker General Electric
Slip type High Slip
Rotor 1 Single Tone 7 port
Rotor W-20 inches
Rotor H 7 inches
Siren Maker Federal Electric.

Sterling Y-5 (M-5 with Motor Brake) 1930's
Voltage 220V 60hz
Phase: 3
Motor Type Induction
Motor Frame# Unknown
Dual Shaft
Amp: 40
HP 10
RPM 3300
Motor Maker: Pierless
Slip Type high Slip
Rotor 2 1-single tone 8 port 1-single tone 16 port conected to opaset ends of siren to make dual tone.
Rotor W- 16inches
Rotor H-7 inches
Siren Maker Sterling MFG

P-15 1987
Voltage 220V 50/60hz
Motor Type: Capacitor start Capacitor Run.
Motor Frame #: 254
Single shaft
Phase: 1
Amp 100
HP 15
RPM 3450
Motor Maker Doer
Slip Type High Slip
Rotor 1 Single tone 8 port
Rotor W- 20 inches
Rotor H- 7 inches
Siren Maker ACA

2T 1976
Voltage 220V 25-60hz
Motor Type Series Wound.
Motor Frame# Unknown
Single Shaft
Phase: 1
Amp 12
HP 2
RPM 8000
Motor Maker General Electric or Robins Meyer
Slip Type Low Slip
Rotor 1 Dual Tone Stacked 4/5 port
Rotor W-6 inches
Rotor H unknown
Siren Maker Federal Signal

Nice collection, Archon.

Thanks for the details and specs.

Surprised the rotors are so large.

On the 2t, what does "stacked" mean?

On the 8/16, can you detect two tones?
Exactly one octave apart, I presume it sounds like one bright tone.

I envy your collection! Robert: a stacked rotor is a single rotor with two sections, one having more ports than the other, and usually sharing a common central air intake. This is opposed to a two-rotor siren, with a rotor on either end of a double-shafted motor. The Sterling M-series sounds almost exactly like its successor, the Sentry 20V2T and similar models. Sound files are available on their website, and both tones are distinctly audible.

Thanks Daniel.

I thought maybe the rotors could be separate and be interchanged
to have whatever you wanted.

I'd expect the 8/16 tones to blend into one, just as 8' and 4' pipes
blend to create one brighter sound.

Even the dual-tone minor third siren tones blend to make a resultant tone
which I hear more than either of the two actual tones.