How to: power this old ringer?

Pharaday

Jan 18, 2016
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How do I make this ring? Inside the bell is alot like my old doorbell. It has copper coil that drives a ringer (ya know, with electromagnets/opposite poles, that thing) which moves horizontally and strikes both sides of the bell. I just wanna give it a battery and a switch amd make het ring . Hang on, trying to post the picture...
 

Pharaday

Jan 18, 2016
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For some reason, I kept getting an error when trying to upload a pic to the forum

Because it was WAY too big, you need to resize before uploading to a max of 1024 x 768
and preferably smaller 800x600
here is the pic, now inline


Clipboard01.jpg

[Mod Edit added pic and comment]
 
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Pharaday

Jan 18, 2016
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Give it power through the 2 yellow wired coming out of the bell itself? May I assume that the wire on the switch is negative? Well, I tried giving it 9V, no ring... something to do with... the phone signal?
 

duke37

Jan 9, 2011
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The ringer signal is AC on a phone. There is thus no negative.
Your picture blanks out after a second or so thus I cannot see the circuit. Are there pionts to actuate the coil?
 

Pharaday

Jan 18, 2016
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I would imagine those yellow wires come out would be the only way to activate that coil. Here are 3 pics. All with the metal part of the bell taken off. One showing the topside of the bell mechanism, one showing the bottom of the bell mechanism and s close up if that switch. the switch has 4 wires. red and green from the telephone line, black from the battery and one of the two yellow wires coming out of the bell
mechanism.
https://imgur.com/a/jP3BMmG
https://imgur.com/a/crieCUS
https://imgur.com/a/UEAR52x
 

Pharaday

Jan 18, 2016
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And I make it ring by.....

lol jk so its that outdated huh. well thanks guys
 

Audioguru

Sep 24, 2016
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In Canada and United States an old phone ringer worked on 90V at 20Hz. It probably would not work at the 60Hz of electricity.
An original Bell Telephone used two gongs. Each gong was hit 20 times each second and played different frequencies (440Hz and 480Hz).
Your ringer has only one gong so it would sound completely different to an old original Bell Telephone.
 

Pharaday

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ok I see what you're saying. I need to connect a bunch of resistors in series and plug them into my outlet so I can get 75V. Just jam em in there, right?
 

AnalogKid

Jun 10, 2015
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Traditionally, a phone bell needs around 70 to 90 Vac, at around 20 to 30 Hz. But to see if is even functional, use a transformer with a 24 to 48 Vac secondary. The armature won't be happy trying to move that fast, but you should get something out.

ak
 

davenn

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Sep 5, 2009
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ok I see what you're saying. I need to connect a bunch of resistors in series and plug them into my outlet so I can get 75V. Just jam em in there, right?


NOOOOOOOOOOOOOOOOOOOOOOOOOOO

please don't do that ….

A bunch of resistors give no isolation/protection from the mains
did you not notice people said ~ 20-30 Hz ?


 

Audioguru

Sep 24, 2016
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The old ringers needed to work miles away from a telephone switching center using very thin wires, and there might be two or three phones in a house in parallel, so their ringing currents needed to be very low. So they were designed to resonate mechanically at 20Hz then a very low current would cause then to swing back and forth at 20Hz. The armature hammer hit one gong when it moved one way then it hit the other gong when it moved the other way. Your bell dont doo dat.
 

davenn

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The armature hammer hit one gong when it moved one way then it hit the other gong when it moved the other way. Your bell dont doo dat.


yeah, it's just a single gong, no problem with that
 

Audioguru

Sep 24, 2016
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Sorry, before I was wrong. The two mechanical gongs on an old Bell telephone were 1280Hz and 1610Hz. The ringtone heard on the caller's phone was 440Hz and 480Hz.
The single ringer gong will sound like a door bell, the alternating 1280Hz and 1610Hz musical chord produced by the two gongs in an old telephone will sound like an old telephone.
 

Pharaday

Jan 18, 2016
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Oh BTW, update:
The ringer worked (overtime) on 120v from the wall. I turned the ringer down as low as it could go...
It didn't care about polarity, just shove a + and - wire in there somewhere. No, that's not a pot I'm using as an on switch, just on/off. Note the nostalgia production is through the roof.
 
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Pharaday

Jan 18, 2016
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Also, a barely working 12v electric motor works GREAT on 24v
 
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