TRANSMITTERS


A Transmitter is the complete unit and a Transmitter-Inset is an insert that maybe fitted within a Transmitter.

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Click here for a description of the early Transmitters
 

Transmitter No. 1

Solid back transmitter.  Also known as a Mark 4001.

Standard Transmitter for C.B. telephones.

Uses a Mouthpiece No. 4.

Invented by an American called A. G. White.

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Telephone mouthpiece sanitisers

Drawing - 7697.

 


 

Transmitter No. 2

Standard Transmitter for L.B. telephones.

Uses a Mouthpiece No. 4.

Telephone mouthpiece sanitisers

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Transmitter No. 3

L.B. Deckert transmitter.

Found fitted to Telephones No. 17, 19 and 21.

 


 

Transmitter No. 4

L.B. Breastplate transmitter used by operators on primary battery trunk exchanges.

Fitted with a Mouthpiece No. 1.

Superseded by the Transmitter No. 23A

 

 
Transmitter No. 5

C.B. Breastplate transmitter used by operators on secondary battery trunk exchanges.

Includes:-
1 x Connection, Mouthpiece, No. 6.
1 x Loop for Bands, Transmitters, Breast Plate, Slotted Hole.
1 x Mouthpiece No. 6 (Mk. N.T. 9).
18" Web, Non-elastic, No.2, Grey.

Superseded by the Transmitter No. 23A

 

Transmitter No. 6

L.B. Transmitter used on Telephones No. 3.

Uses a Mouthpiece No. 5.

 

 
Transmitter No. 8

Used on C.B. exchanges with Arm Transmitter No. 2.

Fitted with a Mouthpiece No. 4.

 

 
Transmitter No. 9

Used on Telephone No. 47.

Fitted with a Mouthpiece No. 4.

Superseded by Transmitter No. 1 with an Adaptor, Transmitter.

 

 
Transmitter No. 10

L.B. type for Telephone No. 28, except Mark 234.

Includes:-
1 x Transmitter, Inset, No. 3.

To be requisitioned separately:-
1 x Connection, Mouthpiece, No. 1.
1 x Mouthpiece No. 1.

 

 
Transmitter No. 11

Used on ATM Co's automatic telephones.

 

 
Transmitter No. 12

Used on ATM Co's automatic telephones.

 

 
Transmitter No. 13

C.B. transmitter for use on Telephone No. 57.

Fitted with a Mouthpiece No. 4.
 

 
Transmitter No. 16

L.B. transmitter used on Electrophone Stage Circuits.

Fitted with an Angelini type transmitter and used a Mouthpiece No. 13.

The Mark 234 (not an Angelini) model used a Transmitter, Inset No. 9.

 

 
Transmitter No. 17

Local Battery transmitter fitted on Tables, Electrophone, NT.

Fitted with a Diaphragm No. 16 or No. 20 and a Mouthpiece No. 4.

 

 
Transmitter No. 21

Used for signalling deposits of coin in prepayment coin collecting boxes.  The operator could hear the bell or gong sound via this transmitter.

Fitted to Coin Mechanisms.

This transmitter includes a Bell Gong No. 18.

 


 

Transmitter No. 22

Used on C.B. and L.B. telephones etc.

Introduced early 1930's and superseded the Transmitter No. 1 and 2.

Includes:-
1 x Mouthpiece No. 16.
1 x Transmitter, Inset, No. 13.

 


 

Transmitter No. 23

C.B. or L.B. moulded Breast Plate type with switch facility (later supplies distinguished from No. 23A by circular yellow spot).

The switch disconnected battery feed to the transmitter, when the mouthpiece was moved away from the mouth.

Transmitter No. 23 includes:-
1 x Loop for Bands, Transmitters, Breast Plate, Slotted Hole.
1 x Mouthpiece No. 17 or No. 19.
1 x Transmitter, Inset, No. 13A.
18" Web, Non-elastic, No. 2, Grey.

Transmitter No. 23A includes:-
1 x Transmitter, Inset, No. 13AA.
Otherwise as for Transmitter No. 23.

To be requisitioned separately:-

1 x Cord, Instrument 4/12A, Brown, 48".

Elastic for Loops, Breast Plate, Transmitters.

Supersedes Transmitter No. 5A.

Used with a Receiver, Headgear No. 10A (See picture to right).

Drawings - 62807 and 62256.

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Last revised: June 22, 2024

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