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PS2/29. DD 1963. WITHDRAWN.
Negative Picture Amplifier for inverting video
standard waveform to give negative picture.
equipment mounted on CHl/12A. DD 1964. ACO.
Processing Amplifier used as clamping reference unit in
C06/50l. Attenuates video waveform from AMl/533, clamps
in black-level reference signal and makes provision for
delay correction. Includes PS2/22C in CHl/12A. DD 1964.
DD Spec 7.17. OBSOLESCENT.
Modified AMl/530 used in C06/503. DD 1965. DD Spec 7.68.
Head Amplifier used in EP6/50l. Fits directly to UNl/548.
5.5Mc/s bandwidth. Input of l~ signal current from
photoconductive tube gives output of -15dB relative to
0.7V d.a.p. Valves: 3 7586. Transistors: 8 Clll, 2
2N9l8. Replaced by AMl/550. DD 1963. DD Spec 7.59.
DDHB 7.123. OBSOLESCENT.
High Level Video Amplifier
output level. Z in: high.
colour signals. Mains
DD Spec 8.180. OBSOLETE.
with zero level input and +lOdB
Z out: 75~. Suitable for NTSC
operated. CHl/12A. DD 1964.
Head Amplifier used in C06/50l. In tubular form length
19lmm, diameter 44mm. Unity gain. Z in: >80k~. Z out:
<25~. DD 1964. DD Spec 7.18. ACO. OBSOLETE.
Field Scan Output Amplifier. Supplies up to 0.45A d.a.p.
scanning current for a 25mm vidicon camera tube. CHl/12A.
Power supply of +18V at lA peak and -18V at lA peak is
DD Spec 7.44.
DDHB 7.81. OBSOLETE.
Difference Amplifier. Output is the
two video input. Mains operated.
DD Spec 8.177. ACO. OBSOLESCENT.
CHl/12A. DD 1964.
As AMl/535 but with 75~ output impedance.
Portable version of AMl/535. 240mm x l33mm x 75mm, for use
DD Spec 8.177.
As AMl/535P but with 75~ output impedance.
Motor Drive Amplifier to enable a synchronous-type motor
with stator energised from 50 c/s local mains supply to
run locked to station field pulses. Derives a signal at
difference frequency between pulses and mains for
application to rotor. PN3/23 with 3 AMl/536 Unit 1, 1
AMl/536 Unit 2, and 3-phase mains transformer. Unit 1:
Motor Drive in CHl/12A, Unit 2: Power Supplier and