TELEPHONE No. 248 |
||||||||
|
This combination was the main phone on
Plans
5, 5A, 7 & 7A. There are two versions of this telephone, the Mark 1 and Mark 2 and some of these made different use of terminals 6 and 8. Terminals 6 and 8 maybe reversed which meant that the green wire of the Handset cord could be on one of two terminals. The Handset cord green wire on the Mark 1 and early Mark 2's used terminal 6 whilst the later Mark 2 used terminal 8. The only way to tell which type is to inspect Terminal 8 - on the Mark 1 and early Mark 2's the soldered wire is coloured green, whilst on the later Mark 2 the wire is white. The Mark 1 was also fitted with a Cord , Instrument No. 3/31 8" whilst the Mark 2 had a Cord, Instrument No. 8/10E 8". The Mark 1 was fitted with a Coil, Induction No. 24 whilst the Mark 2 has a Coil, Induction No. 27. The Mark 2 was introduced circa 1945. Terminal nuts are 4BA (Part No. 1/SNU/51). The frame that supports the switch hooks (Part No. 1/SSW/11), also has terminals and contact springs attached. The contact springs are those with two contacts per spring (Springset Part No. 1/SSP/711). Spring 1 of the cradle switch is spring-set is adjacent to the mounting. The Telephone No. 248 pictured below is mounted on a Bellset No. 39. Telephone (Mark 2) includes (Rate Book 1946 and 1956):- Circuit Diagram - N348 (Mark
1). General information on 200 type telephones Collectors Information - what to look for How to dismantle a 200 type telephone How to wire your Telephone No. 248 to make it work on BT Plug and Sockets
Telephone No. 248 fitted on a Bellset No. 39
This is a CB variant and therefore has no dial
Interior view showing the additional terminals mounted on a Paxolin extension plate
The handset cord has been replaced by a PVC variant
|
||||||||
Last revised: June 08, 2025FM | ||||||||
Introduced
in 1938 this telephone was used with a 
