CHI
CHl/39A,39B
CHl/40
CHl/4l
CHl/42
CHl/43B
CHl/43C
CHl/44
CHl/45
CHl/46A,46B
CHl/47A
CHl/47B
CHl/47C
CHl/48A,48B
CHl/49
72 -
Screened version of CH1/12.
Width:
A
54mm; B = l08mm.
DD 1966. DD Spec 6.128. OBSOLESCENT.
Screened chassis similar to CH1/6 but accepts BNC sockets
instead
of
MUSA.
Not
intended
for use above
100MHz.
DD 1967. DD Spec 12.29. OBSOLESCENT.
Attenuator Chassis for use as a screened mounting at high
frequencies. 203mm x l3mm x 35mm. Fitted with BNC
connectors at each end. Used in CTl/2A-H. DD 1967.
WITHDRAWN.
Chassis for
of CH1/23.
desk mounted equipment.
SCPD 1967. OBSOLESCENT.
Half height version
Single module width version of CHl/12A but with a 25 way
ISEP rear connector as in CH1/43A and the addition of a
back plate. Index arrangement is as CHl/43A. DD 1968.
OBSOLESCENT.
Dummy Chassis occupying same space as CHl/43. DD 1968.
WITHDRAWN.
for 19 STC
Mounts on
suffixes. A
1.5 width; D
type 25 relays. l27mm x 57mm x
PN3/44. Later versions are
= single width; B = double
treble width. SCPD 1967.
Relay Chassis
l46mm deep.
indicated by
width; C =
OBSOLESCENT.
Directional Coupler Chassis for housing Band IV and V
directional coupler printed boards. Consists of two
aluminium alloy channels forming a box approximately 108mm
x 45mm x l3mm. DD 1967. DD Spec 6.133. OBSOLESCENT.
Similar to CHl/l2A, CHl/12B, but with longitudinally
hinged board. DD 1967. DD Spec 5.125. OBSOLESCENT.
Relay Chassis for accommodating 100 P.O. 3000 relays.
483mm x 7llmm pan chassis with removable front and rear
covers. Used in Birmingham Headquarters Selector Room.
DD 1968. WITHDRAWN.
As CHl/47A but 889mm high to accommodate 125 relays.
DD 1968. WITHDRAWN.
Similar to CHl/47A but 622mm high and with mounting for 1
LM Ericsson Crossbar unit and associated pilot relays.
DD 1968. WITHDRAWN.
UHF Chassis for a range of UHF amplifiers and mixers.
l08mm x 92mm x 36mm with slot for a ground plate or
printed board. A = with ground plate; B = without ground
plate. Capable of being stacked together in a nesting
box. DD 1968. WITHDRAWN.
Similar to CHl/48 with slot for a printed board. 108mm x
92mm x 36mm. DD 1968. WITHDRAWN.

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