C MARKETING INSTALLATION
Issue 2, Dec 1972
700 TYPE TELEPHONES - HANDSET WEIGHT
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
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)