PA18M/12
PA18M/12A
PA18/l3
PA18M/14
PA18M/15
PA18/l6
PA18/l7A,17B
PA18/l8
PA18/l9
PA18/501
PA18/502
PA18/503
291 -
PA18
Remote Switch Panel used at Ho1me Moss with PA18M/12A
Leeds for control of input to Holme Moss sound and vision
transmitters. PN3/23 with PS2/49, UNlM/65B, UN20/4A,
UNl/62, FL6/7. 1967. WITHDRAWN.
Used at Leeds to control PA18M/12 at Ho1me Moss.
with PS2/55, UNIM/65A, UN20/4B, UNl/62, FL6/7.
WITHDRAWN.
PN3/23
1967.
Stereo Switch Panel for new studio control cubicles at
Birmingham. Switches any combination of 10 zero level
stereo sources to 6 stereo tape record inputs. 483mm x
222mm panel with 60 push button switches, input and output
listen jacks, 12 AM9/5 in 2 groups of 6, one group being
left unequipped if panel is used for mono only.
SCPD 1969. OBSOLESCENT.
Remote Switch Panel located at Caversham studio and
controlled from London to send back programme from
Reading, Oxford or Caversham studios. PN3/23 with UN1/63,
AM7/2A, 2 UN20/4, FL4/44, UN2l/35. 1969. WITHDRAWN.
Switch Panel located at London Control Room for
controlling PA18M/14 at Caversham. PN3/23 with UNl/63, 2
AM7/2A, 2 OSl/4, FL4/44. 1969. WITHDRAWN.
Record Select Switch Panel similar to PA18/l3 but for 4
tape machines. SCPD 1970. OBSOLESCENT.
Drive Changeover Panel similar to BA18/3 but of more
modern design. Used for VHF sound broadcasting. A = 50~
impedance; B = 75~ impedance. 483mm x l33mm panel. 1971.
OBSOLESCENT.
Relay Matrix
level system
control and
PN3/49 with
OBSOLESCENT.
Switching Panel, with reed relay matrix multi
for routing and on air switching of sound,
talkback circuits at Television Centre.
CHI/50 and UN21/5A-T. SCPD 1972.
O.B. Monitoring Switch Panel, of commercial design to BBC
specification, forming part of UNl/145. Carries buffer
amplifier for cue, PFL and tape monitoring input signals.
Wedge shaped modular construction, with sloping front
panel 90mm x 133mm. SCPD 1972. OBSOLESCENT.
Sync Selection Panel used with vision mixer installations
to route non-synchronising video sources to the sync
separator in AM18/501. 1959. DD Spec 8.33. DDHB 8.81.
TI.TVX.8. OBSOLESCENT.
Sync Panel with 2 5 pole, 23 way Ledex
central mixer in Television Centre.
chassis. 1959. DD Spec 8.34. DDHB 8.82.
switches to feed
356mm pan-type
OBSOLESCENT.
Switch Panel with 2 5 pole, 23 way Ledex switches for
vision preview in central mixer at Television Centre.
l78mm pan-type chassis. 1959. DD Spec 8.35. DDHB 8.86.

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