Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Appliances

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-26-2008, 11:39 PM   #1
Member
 
Join Date: May 2005
Posts: 127
Share |
Default

Wiring Diagram For A 1970's Phone


hello,

i hope i posted this question to the right forum!

i just aquired an old 1970's rototary desk phone. it has a switch on the housing of the phone, that i found out is for switching from one line to another. the green and red wires (tip and ring) are for one line, and the yellow and black (spares) are for the other line. i wired it for red and green and then yellow and black and both lines work. the problem is, the ringer is very weak. the bell clapper barley moves. these phones are usually bullet proof, so i dont think the coil for the ringer is bad, but could be. does anyone have a diagram for the internal network for this type of phone? i think the ringer may be wired to the network block in the phone wrong.

bob
bobo is offline   Reply With Quote
Old 09-27-2008, 07:23 AM   #2
the Musigician
 
DangerMouse's Avatar
 
Join Date: Jul 2008
Location: I'm right here!
Posts: 10,404
Default

Wiring Diagram For A 1970's Phone


those old dialers usually had a 'ring volume adjust' tab/slider on the bottom. this may be the problem....but what do i know? i'm just a cartoon mouse......

DM
DangerMouse is offline   Reply With Quote
Old 09-27-2008, 09:55 AM   #3
Member
 
Join Date: May 2005
Posts: 127
Default

Wiring Diagram For A 1970's Phone


dm,

yes it does have a ringer adjustment. i have it on loud, and it is adjustnig the bells far apart like it should. im going to hard wire the bell to tip and ring on the customer interface and have someone call me and see if it rings....bob
bobo is offline   Reply With Quote
Old 09-27-2008, 10:43 AM   #4
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 3,672
Default

Wiring Diagram For A 1970's Phone


Quote:
Originally Posted by bobo View Post
dm,

yes it does have a ringer adjustment. i have it on loud, and it is adjustnig the bells far apart like it should. im going to hard wire the bell to tip and ring on the customer interface and have someone call me and see if it rings....bob

Hard wiring the ringer across the line will not work. The ringer coil will short cicuit the line and it will be busy to the caller. The network in the phone has a capacitor that is in series with the ringer that allows the AC ringing current into the ringer coil but blocks DC.

Between the the 2 ringer gongs is a mechanical adjustment wire that has 2 notches. It adds tension to the clapper arm. Try moving it to the other notch.
rjniles is online now   Reply With Quote
Old 09-27-2008, 12:33 PM   #5
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 3,672
Default

Wiring Diagram For A 1970's Phone


If the phone in question is a Western Electric 500 series phone here is a link (other manufacturers used basically the same circuit)

http://www.porticus.org/bell/images/500dm.gif

Ringer coil 1 between BK and S-R

Ringer coil 2 between S and R

Capacitor (part of network) between A and K

BK and R ringer leads connected across L1 and L2 (Tip and Ring)
rjniles is online now   Reply With Quote
Old 09-27-2008, 09:21 PM   #6
Member
 
Join Date: Jul 2008
Location: Canada (s/w ON.)
Posts: 2,294
Default

Wiring Diagram For A 1970's Phone


It could also be that the capacitor has dried out and changed value.
Ringing voltage is 20 cycles per second, so the capacitance and the inductance of the ringer coils must be such, to allow the ringing current to flow.
Wildie is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wiring diagram for three-way switches with pilot light SaxTeacher Electrical 34 09-15-2013 07:53 AM
wiring diagram question screenporch21 Electrical 10 11-30-2008 08:14 PM
Which diagram to use on Lenox Thermostat wiring setup? Heat Pump Lenox techs needed twilightcall HVAC 1 08-13-2008 11:49 AM
Does this wiring diagram work? beezlebub03 Electrical 7 05-04-2008 11:54 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.