TELEPHONE No. 3
|Standard CBS No. 1
telephone with no magneto generator.
Wooden Local Battery telephone with sloping writing shelf.
The set shown to the right was made by Ericsson.
A later version was made, the Mk 238, which was oblong in shape (see pictures below).
Fitted with a Transmitter No. 2 although earlier types had a Transmitter No. 6.
Circuit diagram - N103.
This telephone could also work on CBS No. 2 & 3 exchanges by the addition of a capacitor.
Telephone No. 11 was the magneto equivalent.
Drawing No. 8830
Supplied by Ericsson, their Model N20141
GPO instructions state that this telephone should be fixed to
the wall with it's lower edge 36 inches from the floor.
Last revised: January 04, 2019