Which model of the NON-ADA Horn Strobe came out first? The 7002T or the 7002? :?:
Wikipedia is your friend…
“Around 1976, Wheelock created the 7001 (flush-mount electromechanical), 7002 (surface-mount electromechanical), and 7004 (surface-mount vibratory) horn/strobes. These were the first audiovisual alarms to use xenon strobes instead of incandescent lights. The horn and strobe on the 7001 and 7002 models are wired together, resulting in a distinctive “skipping” sound. They skip because when the strobe charges, it draws power from the horn, and when the strobe flashes the power draw stops momentarily, causing it to skip. In 1985, Wheelock redesigned the horn’s grilles, making them vandal resistant. These models contain the letter “T” in their model numbers (i.e. 34T, 7002T, etc.).”
Fun fact: Some of us believe the -T means “terminal strip” because someone here has an alarm labeled “7002T” that has a open grille like a 7002, and a terminal strip instead of leads.
We may never know if this is correct or not.
Thanks! I am currently awaiting a 7002 so that’s why I asked.
Also, the USP FHS-24 is pretty much a hardware clone of the 7002.
The USP FHS…I love that one. See, that’s why its hard for me to play favorites.
The 7002 & 7002T came out around the same time (late 1970s). And the reason for the T in the model number is because the device would have screw terminals; it has nothing to do with the grille being open or closed (except at the corners). Not having a T in the model number, the device has pigtail connectors. It’s just that it wasn’t common to see a 7002 with a closed grille or a 7002T with an open grille. The pigtail connectors were discontinued shortly after Wheelock redesigned the grille, and that’s why a 7002T is more commonly seen with the closed grille.