gec.gif (1164 bytes)GEC GECOPHONE
CIRCUIT DIAGRAM


Presented here are three diagrams - you have to make up your mind which is the correct one for your telephone.  Under each diagram are instructions on how to wire the telephone up for Plug and Socket.

 


Telephone to Diagram S52597

This telephones has two capacitors, which are in the same casing.  The casing therefore has four terminals.

Using a standard UK line cord connect:

  1. Remove and discard the old line cord.

  2. Feed the new line cord through the casing entry hole and tie it or knot it to the metal loop inside the phone.

  3. White of new line cord to terminal 4.

  4. 3.3k resistor fitted between 4 & 5.

  5. Red of new line cord to terminal 6.

  6. Green of new line cord - spare - insulate.

  7. Disconnect the green wire on 2uf capacitor and connect this to the Blue wire of the new line cord (insulate with tape).

  8. Check transmission and replace transmitter if bad and always fit a Rectifier element across the receiver on terminals 1 & 2.  Click here for more information.

 

The picture below shows the base of a Gecophone to diagram S52597
The induction coil is shown at the top and the double capacitor at the bottom


Telephone to Diagram KS8197

Using a standard BT line cord connect:

  1. Remove and discard the old line cord.

  2. Feed the new line cord through the casing entry hole and tie it or knot it to the metal loop inside the phone.

  3. White of line cord to Bellset terminal L1.

  4. 3.3k resistor fitted between Bellset terminals L1 and E.

  5. Red of line cord to Bellset terminal L2.

  6. Blue of line cord to Bellset terminal C.

  7. Green of line cord - spare - insulate.

  8. Disconnect one of the wires on the 2uf capacitor.

  9. Check transmission and replace transmitter if bad and always fit a Rectifier element across the receiver on terminals 6 & 5.  Click here for more information.


Telephone to Diagram of unknown number

Using a standard BT line cord connect:

  1. Remove and discard the old line cord.

  2. Feed the new line cord through the casing entry hole and tie it or knot it to the metal loop inside the phone.

  3. Remove wire strap between Bellset terminals 5 and 6

  4. White of line cord to Bellset terminal 6.

  5. 3.3k resistor fitted between Bellset terminals 5 and 6.

  6. Red of line cord to terminal Bellset 4.

  7. Blue of line cord to terminal Bellset 3.

  8. Green of line cord - spare - insulate.

  9. Disconnect one of the wires on the 2uf capacitor - the green wire and insulate.

  10. Check transmission and replace transmitter if bad and always fit a Rectifier element across the receiver on terminals 1 & 2.  Click here for more information.

This is a 1936 Gecophone made for Telephone Rentals


Telephone to Diagram KS7239

Using a standard BT line cord connect:

  1. Remove and discard the old line cord.

  2. Feed the new line cord through the casing entry hole and tie it or knot it to the metal loop inside the phone.

  3. White of line cord to Bellset terminal L1.

  4. 3.3k resistor fitted between Bellset terminals L1 and E.

  5. Red of line cord to Bellset terminal L2.

  6. Blue of line cord to Bellset terminal C.

  7. Green of line cord - spare - insulate.

  8. Disconnect one of the wires on the 2uf capacitor.

  9. Check transmission and replace transmitter if bad and always fit a Rectifier element across the receiver on terminals 2 & 3.  Click here for more information.

In the picture above, which is a converted Gecophone, the green of the line cord
looks like it is terminated on E, when in fact it is not terminated and should be insulated.
Note that there is only one wire terminated on the capacitor - the other wire
is hanging free and should be insulated.

 
 
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Last revised: September 02, 2013

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