big yellow toilet

about a year ago i made a really low quality allertor, and promissed i was gonna make a better one in the future. and so after 1.2 years it's here. i literally just took the ACA P-10 and slapped an allertor horn in it (ACA also did this in the 80s)

Introduced in 1968 alongside ACA's other 1st generation sirens, the Allertor 125 was the direct successor to Biersach and Niedermeyer (BNCO)'s Mobil Directo siren, with significant improvements to the design which simplified manufacturing and enhanced the siren's durability and performance versus its predecessor. Rather than using all-metal construction like its predecessor, ACA used then-brand-new fiberglass construction on the Allertor, which greatly improves the siren's longevity and durability as it prevented corrosion and better protected the siren's internals. 1st and 2nd generation models used steel panels for the lower half of the motor cover before switching to using fiberglass on all external parts for the 3rd generation.

The Allertor uses an 18-inch chopper driven by a dual shaft 10 horsepower AC electric motor. The motors were produced by Baldor and Doerr, and are not cross-compatible as the motors use different adapters to attach to the stator. The motors were available in single or three phase, with single phase motors using start and run capacitors. Despite the name Allertor 125, the siren's rated performance varied between 125-127 dB at 100 ft depending on which manual is referenced. First generation units could be 8/12 or 10/12-port dual tone, with 9/12 dual tone being introduced shortly after. 9/12-port dual tone became the standard on second and third generation units. Single tone 8-port or 12-port models were advertised, though none are known to have been built or sold. A few units in Hoffman Estates, IL were mistaken to be 8-port Allertor models, but were proven upon removal to be 8-port Penetrator-15s with 3rd generation Allertor projectors.