Charlie, I think the original poster's complaint was the buzzer signaling on two sets in the loud shop area. The buzzers are already running on 10 volts AC at 60 cycles. A regular bell like those used in elementary school science class experiments would work on 10VAC, 60 cycles with no problem.

Pretty quick and easy solution for just a few bucks. The existing buzzers in quieter areas can be left in place and the common audible ringing can also be left as-is.

I like your idea of controlling garage doors, etc. with 1A2 intercoms, in fact I used to do that with my system at home. Very handy!


Ed Vaughn, MBSWWYPBX