TELEPHONE No. 86
t086.jpg (9042 bytes)CB Microtelephone for night operators.

Handset with press button in handle.  The press button normally shorts the transmitter.

Possibly used on exchange switchboards for monitoring purposes.

This Telephone could also be supplied with a suspension loop and this was superseded by the Telephone No. 94 with loop.

Telephone includes (1928):-
Please refer to table below.

Item Mark 234 Mark 235 Mark 236
Connections, Mouthpiece, No.1 - - 1
Cords, instrument, 111 2 2 -
Cords, instrument, 123, Brown - - 1
Cords, instrument, 123, Orange - - 1
Cords, instrument, 124, Black - - 1
Cords, instrument, 124, Pink - - 1
Cords, instrument, 125, Brown - - 1
Cords, instrument, 125, Orange - - 1
Cords, instrument, 424 1 1 1
Diaphragms, No. 12 1 1 1
Earpieces, No. 2 - 1 1
Mouthpieces, No. 1 - - 1
Mouthpieces, No. 12 - 1 -
Transmitter, inset, No. 1 - 1 1

Circuit diagram - N186.

Drawing No. 8777, 8778 and 8779.

 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: November 29, 2020

FM