View Single Post
Old 6th Dec 2017, 10:39 pm   #5
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 13,498
Default Re: Sterdy door phone handset/cradle

If it is a buzzer, I can't see any interrupter contacts, suggesting that it works on AC.

What is the resistance of the coil? I can't see how many noughts there are.

Is there a gap between the coil cheek and what looks like a piece of flexible magnetic metal?
__________________
Graham. Forum Moderator

Keep the soldering iron hot.
Station X is online now