Need to Ring Bell from Rotary-dial Phone

[Dan Dotson]

Hello:

I don't know if this is the right group to post to, and if it isn't, I would
appreciate any direction to the right group.

I have gutted an old rotary dial telephone. I am trying to find a way to
ring the bell and make it sound like the phone is ringing. I will be using
120v AC (household current) for this project.

I have no idea where to start. I am good with a soldering iron and I have a
basic understanding of various electronic parts. Any help is appreciated!

Dan

 

[scada]

"Dan Dotson" <dotson@noemail.usa.net> wrote in message
news:gW6rc.1207$Sx2.257@okepread01...

Hello:

I don't know if this is the right group to post to, and if it isn't, I
would
appreciate any direction to the right group.

I have gutted an old rotary dial telephone. I am trying to find a way to
ring the bell and make it sound like the phone is ringing. I will be
using
120v AC (household current) for this project.

I have no idea where to start. I am good with a soldering iron and I have
a
basic understanding of various electronic parts. Any help is appreciated!

Dan

In the US the ring voltage is about 90V @ 20 HZ. You should be able to use
60HZ from the wall, but use an isolation transformer with a secondary around
90 VAC. It's important to use the isolation transformer for shock
protection, and equipment protection. Or..... You can buy a Ring Generator
from Jameco (safer way than above). It requires 12 VDC and costs $27. Search
for #145816 @ www.jameco.com

 

[dont know]

Dan Dotson wrote:

Hello:

I don't know if this is the right group to post to, and if it isn't,
I would appreciate any direction to the right group.

I have gutted an old rotary dial telephone. I am trying to find a
way to ring the bell and make it sound like the phone is ringing. I
will be using 120v AC (household current) for this project.

I have no idea where to start. I am good with a soldering iron and I
have a basic understanding of various electronic parts. Any help is
appreciated!

Dan

if you have the old 500 type phone you need 80V 20Hz AC. 60 Hz would
ring too fast. you can try 60 Hz but make sure you have that big cap
you see in the phone wired in series with the ringer coil. The cap was
used to block the Dc voltage on the loop, but also set the ring
impedance as well.

 

[Dan Dotson]

Will the Jameco generator ring just the bell? Or do I have to connect the
ring generator to the components that the bell was connected to? Since I
took everything apart, I just have the bell itself, with the electromagnetic
coil. There are 4 wires attached...



"scada" <scada@optonline.net> wrote in message
news:Rr9rc.108235$MH.22565760@news4.srv.hcvlny.cv.net...

"Dan Dotson" <dotson@noemail.usa.net> wrote in message
news:gW6rc.1207$Sx2.257@okepread01...
Hello:

I don't know if this is the right group to post to, and if it isn't, I
would
appreciate any direction to the right group.

I have gutted an old rotary dial telephone. I am trying to find a way
to
ring the bell and make it sound like the phone is ringing. I will be
using
120v AC (household current) for this project.

I have no idea where to start. I am good with a soldering iron and I
have
a
basic understanding of various electronic parts. Any help is
appreciated!

Dan



In the US the ring voltage is about 90V @ 20 HZ. You should be able to use
60HZ from the wall, but use an isolation transformer with a secondary
around
90 VAC. It's important to use the isolation transformer for shock
protection, and equipment protection. Or..... You can buy a Ring Generator
from Jameco (safer way than above). It requires 12 VDC and costs $27.
Search
for #145816 @ www.jameco.com