I am always getting asked where to get telephone leads and the electronic transmitters from.
So I now produce a kit of parts to convert your old GPO - Post Office - BT telephone and even some privately supplied phones (most UK produced phones can be converted - if you have a diagram). The kit works on UK wooden, 200, 300 and 700 type instruments (mail me about other types, including foreign phones). Most GEC, British Ericsson, ATE, ATM and Siemens Brothers phones can also be converted.
Replacement GPO red and blue electronic transmitters (red will work on 200, 300 and 700 type telephones, whilst the blue variant will only fit in 700 type telephones) are sometimes available. I can also supply new original carbon granule transmitters and many small parts for Trimphones and 700 types - please email me for price and availability of these.
Modern Line Cords
For 200/300 types choose the black cord and for 700 types the light grey cord is more or less the same as the cords used by BT when converting 700 types in the 1980's. For black coloured 700 types the black cord can also be used.
Ease of installation
I will also convert a phone on request - please advise of manufacturer and model number. Remember the carriage costs will be on top of the conversion cost.
The above kit does NOT include a transmitter. The kit includes instructions, but you will also have to refer to the transmitter replacement section for 200 & 300 type telephones (if an electronic transmitter is supplied) and the conversion page for the actual wiring information of your phone.
At present I have the following spares:-
Please send a cheque made payable to 'British Telephones' at the address below:-
Remember to include a return address and if ordering a kit, the colour of the cord.
If you are a purest, I also have some bell ringers (Bell No. 59D-1 un-mounted) with a coil resistance of 4000 ohms. These will fit straight into 700 type telephones, but can be modified to fit 300 types. They will also fit in Bellsets. Email me if you want one of these.
Please note: The kits I supply are for domestic use only and not for resale.
Last revised: June 25, 2013