BELLSET No. 26

The Bellset is usually wall mounted and the cover was produced in plastic in the colours black, red, green and ivory.  The early covers were replaced circa 1963 with a thinner plastic cover coloured grey or ivory.

The early covers were called Part No. 1/SCO/1 Colour, the black being produced in Phenolic Resin, Type GX (Specs BS771 & S116) and the three colours in Diakon, Grade L.A. (Spec S116).

The Grey and Ivory covers were called the Cover No. 71A (Colour).  They were made of Toughened Polystyrene Type 1 (Specs BS3126 & S116).

Early bell sets could be fixed under a 100 or 200 type Bakelite table telephone.  Special fixing screws (Part 1/SSC/338) are required which were supplied as standard on the earlier bell sets.   A Ring-driver No. 5 is used with these special screws.  A Cord, Instrument, No. 3/74H (Colour), 9" or Cord, Instrument No. 4/51H, Brown, 9" or Cord, Instrument No 5/22H, Brown, 9" would also be required to connect the telephone to the Bellset.  Later Bakelite Bellset covers were fitted with screw called the Part 1/DSC/387.

The early Bellset had a wire link soldered between Terminals 1 and 7.  Terminals 2-3, 4-5 and 7-8 had temporary wire links under the screws.

During the 1950's the capacitor was changed to a later model which was cylindrical in shape.

There is also a Bellset No. 26D.  This contains a Bell No. 59D- 1 unmounted and is used on PST installations.

Introduced circa 1932 and superseded by Bellset No. 50A circa 1983.

ATM made some of these Bellsets, their Part No. T4119 and ETL, their Part No. N3088A1T.

Bellset includes (1946):-
1 x Bell No 59A, Unmounted.
1 x Bell-gong No. 2, Nickelled.
1 x Bell-gong No. 2A, Nickelled.
1 x Clip No. 29.
1 x Condenser, M.C., No. 102.
2 x Part, No. 2/SSC/17.
2 x Part, No. 1/SSC/338.
1 x Part, No. 1/SGU/1 (Colour).
1 x Part, No. 1/SCO/1 (Colour).
2 x Washers, Locking, No. 1210.

Bellset includes (1956):-
1 x Bell No 59A, Unmounted.
1 x Bell-gong No. 2, Nickelled.
1 x Bell-gong No. 2A, Nickelled.
1 x Clip No. 29.
1 x Capacitor, Paper No. 7705.
2 x Part, No. 2/SSC/17.
2 x Part, No. 1/SSC/338.
1 x Part, No. 1/SGU/1 (Colour).
1 x Part, No. 1/SCO/1 (Colour) Cover - superseded by Cover No. 71A (Colour).
2 x Part, No. 1/DCL/110. (Capacitor clips)
1 x Part, No. 18/SBU/18. (Bush)
1 x Part, No. 1/SBA/6. (Baseplate)
2 x Washers, Locking, No. 1-2 BA.
1 x Parts, No. 1/SST/63.

Diagram - N526.

Drawing - 63034.

Specification - S89.

Adjustment of Magneto bells

Click here for the difference between a Bell and a Bellset

How to spot a reproduction Bakelite Bellset cover

Covers and dimensions

Converting a Bellset No. 26 to Bellset No. 25 - professional conversion kit

To connect a Bellset No. 26 to the UK plug and socket system wire as follows:-

1. Connect the white wire of a line cord (or connect directly to a line socket on terminal 5) - Bellset terminal 2.
2. Connect the blue wire of a line cord (or connect directly to a line socket on terminal 3) - Bellset terminal 9.
3. Connect a 3.3k ohm resistor between Bellset terminals 9 and 8.

Original bell set with Bakelite cover

Later variant with plastic cover

GPO Factories Dept, Cwmcarn.  Bellset No. 26 flow line (Picture dated 1956)

Last revised: December 15, 2024