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UN9
ACO. WITHDRAWN.
UN9/8
Mains Switching Unit
DD 1963/64. WITHDRAWN.
used
on EPl/S02.
CHl/12A.
UN9/9
Remote RF Switch Unit (single
switched) for remote switching of
of a receiver. Frequency range:
used
Tatsfield.
lllmm
x
60mm
DD Spec 12.8. OBSOLESCENT.
pole, 2 position, relay
aerial outlets to input
50Hz to 30MHz. First
x 32mm. DD 1965.
UN9M/10
Remote RF Switched Unit (4 inlets).
First
used
Tatsfie1d.
Mounts
in
DD Spec 12.8. OBSOLESCENT.
CH1/18C with 2 UN9/9.
PAl8M/4. DD 1965.
UN9M/11
Remote RF Switched Unit (6 inlets).
First
used
Tatsfie1d.
Mounts
in
DD Spec 12.8. OBSOLESCENT.
CH1/18C with 3 UN9/9.
PA18M/4. DD 1965.
UN9/12
Switch and Indicator Unit used on PAlM/51 for manual
control. CH1/l8C. Suffixes A, Band C indicate slightly
different connections between switch and plug for use on
PAlM/5lA, PAlM/SIB, PAlM/SIC respectively. DD 1965/68.
WITHDRAWN.
UN9/13
Alarm Switch Unit used to provide an energising current
for alarm relays when input falls to zero. Printed board
40mm x 66mm. DD 1965/68. WITHDRAWN.
UN9/14
Remote Switch Unit used on PA6M/53 to change the Rowridge
transmitter from WEHS to local studio broadcast. CH1/18E.
DD 1965/68. WITHDRAWN.
UN9/15
Programme Comparator Switch Unit forming part of a system
to indicate when Radio 1 and Radio 2 are using common
programme
material.
Includes
2 comparator cards and
a
switch stage, and output controls UN8/l0. CHl/18A.
DD 1965/68. WITHDRAWN.
UN9/16
Ta1kback Switch Unit used
pegs 21, 39. DD 1965/68.
on television
WITHDRAWN.
OBs.
CHl/18E,
UN9/17
Prese1ect and Hold Switch Unit first used with UN9/l8,
UN9/19 at Belfast. Contains solid state logic for
switching four interlocking circuits. Printed board 254mm
x 152mm fitted with 33 way ISEP connector. DD 1965/68.
WITHDRAWN.
UN9/18
Control Switch Unit giving choice of 2 remote operate
points, with lockout and local control. Contains solid
state logic for control of two multiplex of UN9/l7. First
used Belfast. Printed board 254mm x l52mm fitted with 33
way ISEP connector. DD 1965/68. WITHDRAWN.
UN9/l9
Marking Switch Unit used with UN9/l7, UN9/l8 at Belfast.
Contains logic elements for marking 10 multiplex of 20
points. Printed board 254mm x l52mm with 25 way ISEP
connector. DD 1965/68. WITHDRAWN.

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