TELEPHONE No. 140


Metal handset, with press switch and loop suspension.

Test telephone used on Siemens No. 16 Automatic exchanges originally.

Telephone No. 140A is used when a Siemens No 16 exchange is fitted with Jacks, Test, No 7 & 9. Fitted with Plug, No. 411.

Similar design to Telephone No. 80.

Made by ATM their model No. L11286

Circuit diagram N 240.
Drawing 8577 (dated 1925).

Telephone includes (1928):-
1 x Condenser M.C., No. 83.
1 x Coil and Plug, No. 1.
1 x Cord, instrument, No. 122.
1 x Cord, instrument, No. 359.
1 x Diaphragm, No. 12.
1 x Earpiece, No. 13.
1 x Transmitter, inset, No. 2.
1 x Plug, No. 310.
 

Telephone includes (1946 and 1956):-
1 x Coil and Plug, No. 1.
1 x Condenser, M.C., No. 83.
1 x Cord, Inst., No. 1/22F, Black, 72"
1 x Cord, Inst., No. 3/59F, Black, 48" (Telephone No. 140).
1 x Diaphragm No. 12.
1 x Earpiece No. 13.
1 x Plug No. 310B (Telephone No. 140).
1 x Transmitter, Inset, No. 1 (No.2 for earlier supplies).
1 x 1 Cord, Inst., No. 3/59F, Black, 48" (Modified to fit Plug No. 411) (Telephone No. 140A).
1 x Plug No. 411 (instead of Coil and Plug, No. 1, of which the Coil, Induction, 1000+50 ohms is fixed to back of telephone) (Telephone No. 140A).
 

 
 
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Last revised: February 04, 2020

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