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Joined: Sep 2006
Posts: 3,290
Member
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Member
Joined: Sep 2006
Posts: 3,290 |
It's a universal buzzer (either AC or DC) depending on where you put the wires.
It will work on 10 VAC, just like the more recent round ones with the blue leads.
The screw with the spring is the volume adjustment.
They never were equipped with 105-volt buzzers.
Arthur P. Bloom "30 years of faithful service...15 years on hold"
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