Earliest electronic siren

[Dr.Jon]

What was the earliest, commercially available electronic siren?

 

[tsquale]

Federal Signal PA-1, 1958

This thread provides a great starting point for equipment timelines: https://elightbars.org/forums/threads/timeline-of-equipment.79727/

 

[Dr.Jon]

Federal Signal PA-1, 1958

This thread provides a great starting point for equipment timelines: https://elightbars.org/forums/threads/timeline-of-equipment.79727/

Thank you!!!