- 307 -
PSI
(unstabilised).
Includes 2 PS2/22A,
PS2/22D.
SCPD 1967/68. OBSOLESCENT.
CHl/12B.
PSl/2l
Variable Frequency 240V Power Supplier consisting of mains
powered oscillator and power amplifier providing a 100W
output at 240V and continuously variable frequency of 38Hz
to 64Hz. 483mm x l78mm panel. 1967/68. WITHDRAWN.
PS1/22
Power Supplier and Burst Gate Pulse used to provide heater
power and burst gate pulse to drive 4 OSl/502. CH1/12A.
1967/68. WITHDRAWN.
PSl/23
Contains PS2/22B (36V) and a field interpolation ON/OFF
switch. Used in PSIM/548. CHl/12A. 1967/68. WITHDRAWN.
PS1/24
Three Phase Variable Frequency Power Supplier used to
drive the motor on programme effects equipment. Includes
oscillator (18Hz-100Hz) and 3 amplifiers. First used in
EPIM/8. 406mm x l78mm x 229mm. DD 1968. DD Spec 3.475.
OBSOLETE.
PSl/25
Power Supplier and Bias Unit used in MDlM/507. Provides
stabilised voltages -12V, +15V, +25V and a variable
negative bias. CHl/12A. 1969. DD Spec 4.55. ACO.
OBSOLESCENT.
PSl/26
Supplies +5V and 240V and +ll5V to footage counter used in
Automatic Cinemas cope Equipment. CHl/12A, pegs 27, 40.
1969. WITHDRAWN.
PSl/27
Variable Frequency Power Supplier used in RP2/6 to provide
a variable frequency drive of 15Hz to 90Hz to give a
turntable
speed
from about
10rpm
to
80rpm.
Includes
OS3/5,
AMl/37.
Fits underneath the
reproducer.
1969.
DD Spec 1.73. DDTM 1.50. ACO. OBSOLESCENT.
PSl/28
Power Supplier and Switch used in PAlM/557 to provide +12V
supply for GE2/583 and to switch the signal through the
eraser
unit
or
a
bypass
circuit.
Includes
PS2/22F.
CHl/12A, pegs 28, 33. 1969. DD Spec 9.128. OBSOLESCENT.
PSl/29
Used in TM3/502 to
inverter, from mains
432mm x 179mm. 1969.
supply unregulated d.c. via an
or battery input. Printed board
DD Spec 6.171. WITHDRAWN.
PSl/30
Used in RC4/504 to supply unregulated
inverter, from a battery or mains input.
432mm x l79mm. 1969. WITHDRAWN.
d.c. via an
Printed board
PSl/3l
Supplies a.c. power to quartz delay line oven heaters and
d.c. power for oven temperature control circuits. First
used Research Department. Advanced Field Store Standards
Converter. CHl/12B, pegs 45, 48. 1969. WITHDRAWN.
PSl/32
First used in Research Department. Advanced Field Store
Standards Converter C06/507 to supply UN9/573, UN9/574.
Outputs: +5V, 0.2A stabilised, and t5V unstabilised into
20~ unbalanced for switch control. Metal case l52mm x

7