Transmitter No. 1
Solid back transmitter. Known as a Mark 4001.
Standard Transmitter for C.B. telephones.
Uses a Mouthpiece No. 4.
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| Transmitter No. 2 Standard
Transmitter for L.B. telephones.
Uses a Mouthpiece No. 4.
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| Transmitter No. 3 L.B. Deckert
transmitter
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| Transmitter No. 4 L.B. Breastplate
transmitter used by operators on primary battery trunk exchanges.
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| Transmitter No. 5 C.B. Breastplate
transmitter used by operators on secondary battery trunk exchanges.
Includes:-
1 x Conn., 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Superseded by Transmitter No. 23A
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| Transmitter No. 6 L.B. Transmitter
used on Telephones No. 3.
Uses a Mouthpiece No. 5.
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| Transmitter No. 8 Used on C.B.
exchanges with Arm Transmitter No. 2.
Fitted with a Mouthpiece No.
4.
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| 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 Conn., Mouthpiece, No. 1.
1 x Mouthpiece No. 1.
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| Transmitter No. 13 C.B. transmitter
for use on Telephone No. 57.
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| 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.
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| Transmitter No. 17 Fitted on Tables,
Electrophone, NT.
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| Transmitter No. 21 Used for
signalling deposits of coin in prepayment coin collecting boxes.
The operator could here the bell or gong sound via this transmitter.
This transmitter includes a Bell Gong No. 18.
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| Transmitter No. 22 C.B. or L.B. type
for telephones etc.
Includes:-
1 x Mouthpiece No. 16.
1 x Transmitter, Inset, No. 13.
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| Transmitter No. 23 C.B. or L.B.
moulded Breast Plate type with switch facility (later supplies
distinguished from 23A by circular yellow spot).
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 Supersedes Transmitter No. 5A.
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