ACA PN-20 Alert: Lockport, IL

[@TheEASdude0825]

sounds like a 2001 during the windup

[@whammyp50]

I envy seeing that more siren enthusiasts get to see this. But by the time I make the effort to get out there they'll probably be replaced. Nice video!

[@niks_crazy_world]

it's now gone.

[@Elizabeth-ts4om]

When it winds up it kinda sounds like a single toned Thunderbolt but then it sounds like a T-128

[@MidwestSirenProductions]

The PN-20 (and RM-130) are basically the first T-128's, as they both forced the sound from the chopper directly to a directional horn. I kind of thought of a single toned Thunderbolt when it wouldn't up too (either that, or a Model 2).

[@Elizabeth-ts4om]

Only difference is that these are 9 port at T-128s are 8-port

[@CenTexElevators489]

As with the motor size, is it really 20 HP, or is it slightly lower (like 10 or 15)?

[@UmbreWolf]

the PN-20 and RM130 are not the same siren. The P-20 has a 3 phase motor being driven by a battery powered 3 phase inverter.(only one I saw that was active looked like it was converted to run straight off 3 phase) The RM-130 use a 72volt DC motor that ran by 6 batteries or a rectifier unit like most newer DC sirens use. The PN-20 is also much rarer then an RM-130

[@CenTexElevators489]

Wow, that's interesting that both sirens are very rare.

[@psirvent8]

Coast up at 0:16 Coast down at 2:17

[@Tigers9596]

Such an awesome sound!

[@Creeperboy099]

8 or 9 port? this is one of the sirens I haven't studied much.

[@MidwestSirenProductions]

The PN-20/RM-130 uses a 9-port chopper, the same one used on the Sreamer S2, S5, and the OM-120.

[@radiosnmore1225]

Holy rm135s