UN13/50l
UN13/502
UN13/502A
UN13/502B
UN13/503
UN13/504
UN13/505
UN13/506
UN13/507
UN13/508
UN14/2
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UN13
UN13 CLAMP UNITS
Stabilising Pre-amp and Video Delay Unit used in AM18/504.
CH1/12A. Transistors: 5 OC71, OC42. DD 1961.
DD Spec 6.102. ACO. OBSOLESCENT.
Clamps standard level composite video signal on any line
standard in range 405 to 625 lines, 50Hz or 60Hz
monochrome and 625 line colour. CH1/12A. Mains operated.
DD 1964. DD Spec 9.41. DDHB 9.45. ACO. OBSOLESCENT.
Similar to UN13/502 but with remote ON/OFF control omitted
and
output
lower
by
5dB.
DD 1967.
DD Spec 4.42.
OBSOLESCENT.
As UN13/502A but input pad removed and a "synchronising
pulses" output facility added. DD 1964. DD Spec 4.42.
OBSOLESCENT.
Black Level
level and
amplitudes.
DD Spec 5.108.
Clamp and Compression Unit used to clamp black
compress sync pulse and picture signal
CH1/12A, pegs 16, 22. DD 1964.
ACO. OBSOLESCENT.
Black Level Clamp Unit used in MN2M/506. CH1/12A, pegs
19, 26. ACO. OBSOLESCENT.
Clamp Unit for clamping a video signal at either black
level or bottom of syncs by switching locally or remotely.
CH1/12A. DD 1967/68. WITHDRAWN.
Clamp Unit used in C06/504 in conjunction with NE4/507 and
GE6/506. Accepts a standard input and clamps the black
level and blanks for the duration of the blanking pulses.
CH1/12A, pegs 16, 40. DD 1967/68. WITHDRAWN.
Clipping Clamp Unit used in PAlM/558 to clamp the
before black level and peak white clipping.
non-composite 700mV maximum, 75~ impedance.
DD 1969. DD Spec 8.384. OBSOLESCENT.
signal
Output:
CH1/43.
Clamp Unit of video transmission quality, to replace
UN13/502 in critical applications where distortion of the
signal must be minimised. Contains PS2/135B. Modified
CH1/12A. DD 1972. DDMI 9.155. OBSOLESCENT.
UN14 DELAY UNITS
H.T. Delay Unit to prevent application of h.t. to valve
circuits and e.h.t. to a cathode ray tube before heaters
and cathodes have warmed up. Used with standards
converters. Mains operated. 425mm x 83mm x 57mm.
Transistors: 2 N657. DD 1964. DDHB 11.10. WITHDRAWN.

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