Pil8
PA18/504
PA18/505
PA18/506
PA18/507
PA18/508
PA18/509
PA18/5l0
PA18/5ll
PA18M/5l2
PA18M/5l3
PA18M/5l4
- 292 -
OBSOLESCENT.
Switch Panel with 6 5 pole,
preview switching in studios
pan-type
chassis.
1959.
OBSOLESCENT.
23 way Ledex switches for
at Television Centre. 356mm
DD Spec 8.36. DDHB 8.84.
Panel, Switch (11 x 6). Uses 6 11 way, 6 pole Ledex
switches. First used Television Switching Centre,
Broadcasting House, London. 1960. WITHDRAWN.
Panel, Switch (11 x 2). Uses 2 11 way, 6 pole Ledex
switches for switching vision sources in a vision mixer.
178mm pan-type chassis. 1960. DD Spec 4.12. WITHDRAWN.
Split Screen Switch Panel. Accepts non-composite video
waveforms for keying purposes and switches between two
video inputs. Uses mixed sync pulses for clamping
purposes. Mains operated. Comprises PN3/23 with GE2/520,
GE2/505A, UN9/521, PS2/505, AM4/5l2 or AM4/517. 1963.
DD Spec 8.166. DDHB 8.157. ACO. OBSOLESCENT.
Sync Switch Panel used in EP5/502 to select sync pulses to
the stabilising amplifiers. Consists of two 8 channel and
two group (2 channel) switch systems and associated pulse
units. Comprises double PN3/23 with 8 UN9/516, 4 AM1/509,
2 GE2/510, 2 GE2/511. Operates on 405, 525 or 625 line
standards.
Weight:
32lb.
1963.
DD Spec 8.143.
DDHB 8.149. ACO. OBSOLESCENT.
Sync Switch Panel used in EP5/503 to select required sync
pulses to the stabilising amplifier, 405, 525 or 625 line
standards. PN3/23 with 3 UN9/516, AM1/509, GE2/5l0,
GE2/5l1, PS2/20. Weight: 7.7kg. 1964. DD Spec 8.191.
DDHB 8.174. ACO. OBSOLESCENT.
RF Changeover Panel (Band I) used in EP7/503. 483mm x
178mm panel with 2 UN9/529. DD 1965. DD Spec 12.27.
OBSOLESCENT.
Provides main ON/OFF control and
C06/501 and C06/593. Also includes
sockets. 483mm x 127mm. DD
OBSOLESCENT.
lamp indication for
2 unswitched 13A mains
1965. DD Spec 7.51.
Recoded PA18M/4. 1965. OBSOLESCENT.
Switch Panel used in EP5/502. Similar to PA18M/5l4 but
generates 2 reference colour black levels. Two PN3/23
with 8 UN9/5l0, 4 AMl/551, 2 GE6/504, 2 AM4/519. 1966.
DD Spec 8.264. ACO. OBSOLESCENT.
Switch Panel for use with EP5/503. Accepts 8 coincident
colour video signals and generates a reference colour
black level from external pulses. Anyone of the signal
inputs, or the reference signal is switchab1e to the
output by applied trigger pulses. Mains operated. PN3/23
with 3 UN9/5l0, AMl/55l, GE6/504. 1966. DD Spec 8.265.

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