Tue Oct 02, 2018 10:54 pm
MaineCivilDefense wrote: ↑Tue Oct 02, 2018 6:43 pm
They did use polarity reversal to make a yelp signal. In the manual of the Allertor and Screamer, it said the 3rd signal would be such. For the rotator, they might've used a separate motor.
How rare are ACA sirens with the yelp tone capability anyways?
I'm going to assume none exist anymore. But I would think that there were some that existed, probably long before my time though.
Greetings from Saint Paul, Nebraska!
Proud owner of an ACA Alertronic AL-4000, Alertronic AL-6000R, Cyclone 120, Type-1 Allertor 125, multiple Penetrators, and two Banshees!