TELEPHONE No. 262CB
|Telephone No. 262CB was a combined handset
telephone and Repeater Telephonic (amplifier) for
customers with weak voices. The phone could be fitted with a
dial if required. The telephone is a modified
The amplifier unit is secured beneath the telephone in the place normally occupied by the bell-set of a combined telephone set and has a moulded cover similar to a bellset cover but modified to accept the amplifier switching key.
The amplifier has a single stage employing a miniature directly-heated pentode type Hivak XY. It is operated by dry batteries housed in a battery box which also contains a bias resistor and capacitor. The degree of amplification is variable and controlled by a potentiometer mounted on a bracket fixed to the telephone cradle.
A Bellset No. 26 was used for the incoming ring and this would be mounted on an adjacent wall.
Available for table use only.
A Dial, Automatic No. 10 could be fitted if required.
The battery box was installed close by. The batteries required to
operate the amplifier were:-
Introduced circa 1952, but no indication of it's life span or uptake.
Superseded by the Amplifier No. 143A in 1961.
Circuit Diagram SA4117.
Drawing - 90347
Specification - D1944.
Last revised: June 22, 2023