Long overview video of my Federal Sign & Signal Thunderbolt 1003A siren. This is a 1975 unit with a converted single-phase 4M-A2 blower and converted RCM. I have the siren on a rolling cart and go over some components I have changed out and those that are original to the siren. I also describe the operation of each component as it pertains the operation of the siren.
5 сен 2022
