UN9
- 380
UN9/20
Power Switch Unit used with UN9/17. Has 10 power stages
for driving lamps, relays etc., load per stage not more
than 100mA. Printed board 254mm x l52mm fitted with 25
way ISEP connector. DD 1965/68. WITHDRAWN.
UN9/2l
Master Operate Switch Unit with solid state logic elements
to give a 'Master' operate facility when used with UN9/l8.
Five outlets. Printed board, 254mm x l52mm x l3mm with 25
way ISEP connector. DD 1965/68. WITHDRAWN.
UN9/22
Miscellaneous Switch
wired out to be used
152mm x 13mm with
WITHDRAWN .
Unit with solid state logic elements
as necessary. Printed board 254mm x
33 way ISEP connector. DD 1965/68.
UN9/23
Reproducer Switch Unit used to route the outputs
reproducers, mono or stereo, to either of 2 busbars.
level input signals produce an output of -50dB on
busbars, suitable for feeding directly into a channel
control desk. Used on studio control desks at new
Birmingham. CH1/37A. DD 1965/68. WITHDRAWN.
to 9
Zero
the
of a
H.Q.
UN9/24
Switch Unit used to switch between the outputs of two
RC5M/7 in VHF FM diversity RBR system. CHl/12A. DD 1971.
DD Spec 5.217. OBSOLESCENT.
UN9/25
OB Eight Channel Switch Unit of commercial design to BBC
specification. Routes eight sources to 4 groups of
busbar, and provides gain control, phase reversal,
response selection and LF filtering facilities. Desk
mounting box approximately 436mm x 460mm x 646mm with
sloping front for control panels and plug in modular
system for individual channel units. SCPD 1972.
OBSOLESCENT.
UN9/26
OB Eight Channel Switch Unit, as UN9/25 but with
additional phantom power supply for consenser microphones.
Desk mounting box approximately 423mm x 470mm x 702mm.
Interchangeable with UN9/25. SCPD 1972. OBSOLESCENT.
UN9/43
Switch Unit. 3U
using CMOS logic.
CANCELLED.
high ISEP card containing 24 AND gates
Used on CMCR EMX systems. SCPD 1977.
UN9/501
For switching 11 vi.sion sources
Uses 3 pole, 11 way Ledex switch.
DDHB 8.83. OBSOLESCENT.
at Television Centre.
DD 1959. DD Spec 8.37.
UN9/502
For switching 23 vision sources
Uses 3 pole, 23 way Ledex switch.
DDHB 8.83. OBSOLESCENT.
at Television Centre.
DD 1959. DD Spec 8.38.
UN9/506
Source
Centre.
Unit for
DD 1959.
switching
WITHDRAWN .
vision sources at Television
UN9/508
Channel Unit for switching
Television Centre. DD 1959.
channels to vision mixers at
WITHDRAvill .

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