- 9 -
~l
Synchroscope in
DDHB 7.95. ACO.
CHl/12B.
OBSOLETE.
DD 1964.
DD Spec 7.52.
AMl/537
Beam Suppression Amplifier used with GE2/52l in EP6/50l.
CHl/12A. DD 1964. DD Spec 7.81. DDHB 7.104. OBSOLETE.
~1/538
I.F. Amplifier (Sound) used in EP7/505, EP7/506. Printed
board. DD 1964. DD Spec 12.1 DDHB 12.3 OBSOLETE.
AMl/539
I.F. Amplifier (Vision) used in EP7/505, EP7/506. Printed
board. DD 1964. DD Spec 12.1. DDHB 12.3. OBSOLETE.
AMl/540
Video Output
DD 1964. ACO.
Amplifier
OBSOLETE.
used
on
EPl/502.
CHl/12A.
AMl/54l
Video Difference Amplifier used in EP1M/529. Mains
operated. Includes calibrator and monitoring amplifier.
Associated with ~4/5l3. CHl/12C, Pegs 14, 28. DD 1965.
DD Spec 9.47. ACO. OBSOLESCENT.
~1/542
Processing Amplifier used in TARIF Equipment EPl/503.
Variable gain. Processes video signal from one channel of
colour telecine machine to compensate for development and
exposure
error.
CHl/12B.
DD 1965.
DDMI 8.204.
OBSOLESCENT.
~1/544
AMl/546
Used on RC5M/50l. CH1/l2A. DD 1965. WITHDRAWN.
Motor Drive Pre-amplifier used to amplify a OdB audio
frequency signal to feed ~1/547. CHl/lZA. DD 1966.
OBSOLESCENT.
AMl/547
Motor Drive Amplifier used to
sinewave amplified by AMl/546.
AMl/546. DD 1966. OBSOLESCENT.
drive 110V motor from a
Mounted in PN3/23 with
AMl/548
Four Tube Colour Matrix Amplifier used with AM19/505 and
two AM19/508 in ~19L/507, to produce RGB and luminance
signals required by a colourcoder when operated with
separate luminance source. Mains operated. CHl/12A, pegs
12, 37. DD 1966. DD Spec 8.306. OBSOLESCENT.
AM1/550
Head Amplifier used in EP6/50l to replace AMl/53l. Fits
on UNl/548. 5.5MHz bandwidth. Input: up to l~ signal
current from photo-conductive camera tube. Output: up to
1.2V d.a.p. video. DD 1966. DD Spec 7.121. DDTM 7.140.
OBSOLESCENT.
AMl/55l
Video Amplifier used in PA18M/5l4 to combine outputs of up
to 3 UN9/5l0. Includes a unity-gain isolating amplifier
and a trigger-assisting circuit. Mains operated.
Supplies power to the UN9/5l0s. CHl/12A, pegs 7, 40.
DD 1966.
DD Spec 8.263.
EDI 10035(1)MAR72.
ACO.
OBSOLESCENT.
AMl/552
Variable Gain Amplifier used in AM18L/5l9 to compensate
for changes in amplitude of input video signals.
Controlled by a d.c. input from UN1/579. CH1/12A, pegs 2,

9