Old phone restoration

[ajlelectronics]

https://www.vintage-radio.net/forum/forumdisplay.php?f=111

 

[jenki]

https://www.britishtelephones.com/

May have some information

 

[Stueeee]

I had a "vintage" dial telephone in my study, -mainly to stop the kids using the bloody thing all the time when they were younger- before I removed it about 10 months ago before doing some building work in there. My local exchange still supported loop disconnect dialling then. The problem with this system is when you call the inevitable call centre and get "press 1 or the hash key for such and such a service" obviously only DTMF will work for that. I had something very similar to this widget to solve that problem. https://www.ebay.co.uk/itm/DTMF-Mul...m4b6351bd1f:g:EIEAAOSwk6FcvZek&frcectupt=true

You just play it down the phone's mouthpiece, my one does all the DTMF stuff.

A more permanent solution would be one of these loop disconnect to DTMF converters -no idea how you'd get hash or star, but presumably there's some way of passing those tones as well as numbers.

https://www.ebay.co.uk/itm/telephon...m4d75f596e4:g:PnoAAOSwrU1bKUFH&frcectupt=true

 

[123hotchef]

nice thanks It probably wont be used much especially for outgoing calls!

 

[rtbcomp]

The NatWest used to issue those DTMF keypads to its online banking customers before internet banking came into being.

 

[CoValent]

OK, so I dug out that bell, and it's even uglier than I remember. It has clearly been submerged at some point, and judging by the mineral deposits it was swimming for some considerable time!

However....IT WORKS!

I hooked it up to a 24V transformer (didn't have anything higher to hand) and after tweaking the bells to meet the clapper and re-tightening one of the electromagnet mounting bolts it makes a bring bring sound once again!

 

[CoValent]

Video with sound:

https://www.dropbox.com/s/ukbcjsfuno09fsz/bell.mp4?dl=0

 

[123hotchef]

sounds nice thanks for testing it out.
so it needs to be wired up to a transformer too does it?

 

[CoValent]

No, the incoming ring voltage provided by the landline does that. I just don't have a landline, so I had to improvise.

 

[123hotchef]

No, the incoming ring voltage provided by the landline does that. I just don't have a landline, so I had to improvise.

ha ha I see cunning

 

[123hotchef]

just looked at the box outside and it is only 2 wires for the incoming phone line I thought it use to be more than that

 

[rtbcomp]

Those of us of a certain age will remember the 2 separate wires and insulators fastened to the side of the house.

https://www.flickr.com/photos/16498755@N07/26709662305/

 

[123hotchef]

Those of us of a certain age will remember the 2 separate wires and insulators fastened to the side of the house.

https://www.flickr.com/photos/16498755@N07/26709662305/

View attachment 184978

huh is that what they are i removed them from my house 2 or 3 years ago i think

 

[123hotchef]

I lied I thought about it

 

[123hotchef]

so does the second socket have to come off of the main socket? Or can I tap into the 2 wires out side and run another socket that way?

 

[merryman]

Everything up to and including the main box belong to the phone line supplier. The rest belongs to you, so you are not allowed to fiddle with the main box or wires to it. 24v seems a bit excessive for testing, I seem to remember 9v being the voltage that phone lines run at.

 

[123hotchef]

Everything up to and including the main box belong to the phone line supplier. The rest belongs to you, so you are not allowed to fiddle with the main box or wires to it. 24v seems a bit excessive for testing, I seem to remember 9v being the voltage that phone lines run at.

huh I say no the boxes belong to me now because the BT engineer did not fit his own new boxes! he used the old virgin boxes. Therefore if I can tap into the main 2 wires in the old virgin box and run that to a 2nd new box it would be easier and only 2 meter cable run rather than 10-12m

 

[rtbcomp]

Telephone lines run at 50 volts.

 

[123hotchef]

Telephone lines run at 50 volts.

I think I measured it at 48V a while back

 

[cheb]

That's the same as bulbs for Lovo lamps. Purely out of interest, how many amps could a BT cable supply?