TESTER AT 4042
This is a fuse, heat coil and MDF cord tester.  They were used in large exchanges and fitted close to the MDF.

The two drawers hold spare fuses and heat coils.

To be requisitioned Separately:-
2 x Caps, Lamp No. 2-1A.
2 x Lamps No. 2-6V.
3 x Cells, Dry, DS 7A.
1 x Plug No. 316, Red.
1 x Cord, Instrument No. 2/22B, Brown, 33".
1 x Receiver H.G., No. 10A.
1 x Cord, Instrument No. 2/82F, Blk. 72".


Superseded by Tester TRT 103 for new work only.

Drawing - 63506, 63507, 70404, 70451 and 70454.

Diagram - AT 4042.

 

 

 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems
Last revised: May 04, 2026

FM