TELEPHONE No. 326


Combined table handset telephone, introduced in 1937, for use in CB and Auto areas.  This telephone had a tray for the subscribers personal directory but as from June 1940 the tray was not fitted and instead the telephone was supplied with a Tray, Dummy, D62099 (a blank plate).  This was probably a war time cost saving, as in late 1947 the tray was re-introduced.

The telephone has only a DC trembler bell ringer with one bell gong.  This would be used for internal signalling only.

There is provision in the case for three additional keys/press buttons.

The telephone was used on extension plans that required extra switches on the telephone.

Mark 1 - has a Receiver, Inset No. 1L in the handset and switch bracket with plungers of the early type.
Mark 1A - has a Receiver, Inset No. 1L in the handset and switch bracket with plungers of an improved type.
Mark 2 - has a Receiver, Inset No. 2P in the handset and switch bracket with plungers of the early type.
Mark 2A - has a Receiver, Inset No. 2P in the handset and switch bracket with plungers of an improved design.

Telephone includes (1946):-
1 x Bell No. 65A, Unmounted.
1 x Part No. 3/SCA/17, Black.
1 x Bell-gong No.2, Nickelled.
1 x Capacitor, M.C. No. 97.
1 x Telephone No. 164, Black.
1 x Coil, Induction No. 27.
1 x Tray, D 62076, Black or Tray, D1/62833, Black or Tray, Dummy, D62099, Black.
1 x Dial, Automatic, Dummy No.3, Black (on CB variant).
1 x Filter, Suppression No. 26A.

To be requisitioned separately as required:-
1 x Block, Terminal No. 20/ . . , Black.
1 x Cord, Instrument No. 5/28E, 5".
1 x Dial, Automatic S.S., No. 10 . . .
1 x Key No. 303A or 304A.
1 x Label No. 160.
1 x Label No. 252 ..., Black

If another colour other than black was required then all the black parts would be replaced with the required coloured parts.

British Ericsson provided the GPO with Telephone No. 326CB, their model N1366 and N1071L1.

Circuit diagram - N426.

Diagram for Button labels - N620.

Drawing No. 63022 - Telephone components parts.
Drawing No. 63023 - Chassis components.
Drawing No. 63250 - Chassis components (improved switch hook buttons).
Drawing No. 90319 - Telephone parts (Mk 3A).
Drawing No. 90373 - Chassis components (improved switch hook buttons).
Drawing No. SBA12 - 300 type base plate.
Drawing No. SCA17 - 300 type complete case.
Drwaing No. SCA20 - 300 type case.
Drawing No. SCA47 - 300 type complete case (improved switch hook buttons).

How to wire your Telephone No. 326 to make it work on Plug and Socket

Dismantling your Telephone No. 326

Dismantling the Handset

History, Technical and General Information on 300 type telephones

Collectors information

Adjustment of Magneto bells

Keys for use in 300 type wall and table telephones

Lamp Fittings

Labels that fit in the sliding tray

General fault finding on your phone

How to restore Bakelite

Comparison chart of GPO 300 type telephones

The picture above shows the inside of a Telephone No. 326
Note: Only one bell gong and the bell ringer is a DC trembler mechanism
In place of the missing bell is an anti-sparking circuit for the bell contact breaker

 

 


Typical 300 type chassis showing dial cord wiring arrangement

 

 

 
 
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Last revised: April 22, 2022

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