General discussion

How to connect an old tel. bell to door bell.

Hi,
I have an old Telefone very loud Bell & want to connect it to the gate small bell (which i cannot hear).

I wish I could attach a foto here, but it has 2 2" bells, silvery cylinder el. component 3" long, 2 electromagnets 2" long & 10 screw connectors for wires.

It used to work untill a disconnected it & now use cordless telefone.

Does anybody have a cristall ball to see it & advise if I can use it as a gate bell? .....thanx ......nick

Discussion is locked
Follow
Reply to: How to connect an old tel. bell to door bell.
PLEASE NOTE: Do not post advertisements, offensive materials, profanity, or personal attacks. Please remember to be considerate of other members. If you are new to the CNET Forums, please read our CNET Forums FAQ. All submitted content is subject to our Terms of Use.
Reporting: How to connect an old tel. bell to door bell.
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Comments
- Collapse -
FUN PROJECT!!!

The problem here is that we have a few issues to solve. The first is understanding that the really old ringers required a signal from the telephone company so let's find out what that signal was. (I'm going to use duckduckgo instead of google here.)

http://duckduckgo.com/?q=telephone+ring+signal+specifications

AHA, we find out it matters what COUNTRY this Telephone is from. You spelled it as "Telefone" so for this discussion you'll have to use your country's specs. For the USA I read at http://www.epanorama.net/circuits/telephone_ringer.html that it's "20Hz minimum ring voltage supplied is 40Vrms (delivered into a 5 REN load)."

Now that we know this we have to find a way to create such a signal. Again, we duckduckgo.com as above to find this link. http://www.techlib.com/electronics/telephone.html

The second schematic is what we need. Now try connecting your wires from your current bell to that ring inhibit and see if that works for you.
Bob

- Collapse -
How to connect an old tel. bell to door bell
- Collapse -
And it looks like you need to build the circuit to drive it.

Since most AC or MAINS is 60Hz and these bells need 20Hz (varies on country) then you are looking at a small electronics project.
Bob

- Collapse -
How to connect an old tel. bell to door bell

Sorry for the shortcut "....fone", it is here in the old UK BT.

Did you see the attached foto of it?

Could'nt make a word of all that but the duck was fine.

- Collapse -
Saw the foto

And it sounds like a fun project. The links I gave have the necessary details but I can imagine those that don't make their own stuff may feel challenged.
Bob

- Collapse -
How to connect an old tel. bell to door bell

OK thanx all, can never manage it, will sell it !!!???

CNET Forums