Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Classifieds
Media
New media
New comments
Search media
Log in
Register
What's New?
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More Options
Advertise with us
Contact Us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Hobbies & Interests
Gearheads
Electrical advice - old fire alarm bell
Search titles only
By:
Reply to Thread
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="kingfish" data-source="post: 3824958" data-attributes="member: 50496"><p>The two coils are electromagnets. Since I see no rectification circuitry to convert it from AC (electromagnets only work with DC) then you are down to three choices. A dc variable power supply would be the easiest way to figure it out, but you probably don't have access to one. So you will have to use batteries to figure it out. Start with a 6v lantern battery. If that doesn't make it function or ring weakly, touch the wires to your car battery. If it rings like you would expect it to, then you have your answer. If not then it is either 24v or nonfunctional. be careful when using your car battery. If one of the coils is shorted, you could get a pretty big spark and it get hot in a hurry.</p></blockquote><p></p>
[QUOTE="kingfish, post: 3824958, member: 50496"] The two coils are electromagnets. Since I see no rectification circuitry to convert it from AC (electromagnets only work with DC) then you are down to three choices. A dc variable power supply would be the easiest way to figure it out, but you probably don't have access to one. So you will have to use batteries to figure it out. Start with a 6v lantern battery. If that doesn't make it function or ring weakly, touch the wires to your car battery. If it rings like you would expect it to, then you have your answer. If not then it is either 24v or nonfunctional. be careful when using your car battery. If one of the coils is shorted, you could get a pretty big spark and it get hot in a hurry. [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
Hobbies & Interests
Gearheads
Electrical advice - old fire alarm bell
Search titles only
By:
Top
Bottom