BELLSET No. 15

Bellset, of wooden construction, used with:-

1. For C.B.S. No. 2 and 3 systems: with Telephone, No. 4.  Diagram C.B.S. 590.

2. For very long lines on Automatic systems: with Telephone, No. 134. Diagram A.T. 788.

3. For Magneto "Condensered" systems: with Telephone, No. 4 and Generator No. 3AN, or No. 4CN, or No. 8AN. Diagram C.B.S. 590.

4. Repeater, Telephonic No. 9A on CBS No's 2 & 3 and Magneto systems.

The housing is called a Cases No. 1 and could be constructed of American Walnut, Black Chuglam, Pyinma, Halou, Tasmanian Myrtle or African Mahogany.

Made by Ericsson - their Model No's N13195 (Mk 234) and N3092A.

Introduced circa 1913 and was superseded by the Bellset No. 31 by 1946.

Dimensions - 9.6" high x 6.75" wide x 3.4" deep.

Bellset includes (1928):-
1 x Bell, No. 1A, unmounted.
1 x Coil, Induction, No. 12.
1 x Condenser, M.C. No. 30 (prior to 1932).
1 x Condenser, M.C. 102 (1932 onwards).

Circuit diagram - N515.

Drawing - Bellset - 1576 (Mark 1 - Dated 1913).
Drawing - Cases No. 1 - 7276.

Adjustment of Magneto bells

Last revised: February 20, 2026