HANDSET WEIGHTS FOR 700 TELES


TELECOMMUNICATIONS INSTRUCTION
C MARKETING INSTALLATION
3 Internal
B1005
Issue 2, Dec 1972

700 TYPE TELEPHONES - HANDSET WEIGHT

GENERAL
Occasionally, when auxiliary gravity switches are fitted to 700 type telephones, difficulty may be experienced because the handset is insufficiently heavy to fully operate the gravity plungers. This can be overcome by fitting part 1/DWE/7.

DESCRIPTION AND FITTING
Part No. 1/DWE/7 is a lead weight which fits in the handset receiver cavity. It is curved to fit close to the inner face of the moulding and is held in place between the two reinforcing ribs remote from the handle.

To fit the weight, the earcap, receiver and spring ring must first be removed. The weight can then be slid into position and the other components replaced. Instances where the weight is a loose fit it can be secured by either:-

1. flattening the form of the weight, i.e. increasing the radius of the curvature, to jam against the reinforcing ribs, or

2. inserting another ring (Part No. 1/DRI/50) upside down, underneath the ring already supplied.


LIMITATIONS
The handsets 10A and 14A cannot accept a Part 1/DWE/7.

TELEPHONES 746 Mk 1
The case shape of the 746 Mark 1 has been reported to cause unreliable operation of the gravity switch. When redesigned covers are available, (Parts 3/DCO/703) they should be fitted in preference to adding a handset weight (this case has a recess in the moulding where the handset rests).

TELEPHONE 740 Mk 1
The same problems exist - as for the telephone 746. The redesigned covers are coded 4/DCO/723 (plain) and 5/DCO/723 (with lamp opals).

(Formerly EI Telephones, Stations, A1061)

 

 
 
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Last revised: December 18, 2010

FM