PS2/2
PS2/3
PS2/4
PS2/5
PS2/5A
PS2/6
PS2/7
PS2/8
PS2/8A
PS2/9
PS2/l0
PS2/l2
PS2/l3R
- 309
PS2
or PS3/4A. CHl/3
at up to 300mA,
300mA stabilised,
Centre. Suffix A
output. 1957.
One to four used with either PS3/4
chassis.
Inputs: 270V or 340V
d.c.
approximately. 200V-250V d.c. at up to
isolated from earth. Used at Television
indicates unit with 2S0V d.c.
DD Spec 2.115. ACO. OBSOLESCENT.
Used for constant voltage charging of one or two nickel
cadmium
batteries.
Input: 100V-200V a.c. and
200V-2S0V
a.c. Output: l2.SV d.c. at 30mA. l68mm x l14mm x l43mm.
DD 1959. DD Spec 3.236. OBSOLESCENT.
Used on VF Switching System between Glasgow and
Kirk O'Shotts. 483mm x l33mm. Outputs: 266V chopped,
30mA; l80V and 90V stabilised, negligible load; 230V
unstabilised, 2lmA. 1960. DD Spec 2.145. OBSOLESCENT.
Used for VRFM Drive Units. Similar
PS2/2. Outputs: 260V at 250mA, 6.3V
1960. ACO. WITHDRAWN.
in construction to
at SA, 6.3V at 1.5A.
As PS2/5 but outputs 260V at 250mA, 6.3V at 0.3A, 6.3V at
SA, 6.5V at 7A. 1960. WITHDRAWN.
Used for transistors and bias in VRFM Drive EP7/2. 1960.
ACO. WITHDRAWN .
Used in Mobile Control Room to supply MX2/502. Outputs:
200V at 80mA, 250V at 60mA (unstabilised). 1960.
DDHB 8.93. WITHDRAWN.
Used on PA1/28, PA1/29. Output: 24V at 250mA. Includes
automatic change over to external battery if mains fail.
1960. DD Spec 2.172. OBSOLESCENT.
Used on PAS/4, PA5/5 to provide 24V at up to SOOmA.
Updated version of PS2/8. Chassis with front panel for
fixing
to
PA5/4,
PA5/5.
1969.
DD Spec 2.304.
DDHB 2.184. OBSOLESCENT.
Supplies up to 500mA at 24V. Input: 190V-260V a.c.
CHl/18B. Superseded by PS2/49 in new installation. 1961.
DD Spec 3.317. OBSOLESCENT.
Used with AMI8/S03 and AM18/504. CHl/12B. Input:
200V-2S0V a.c. Outputs: (a) 400mA at +12V d.c. (b) 90mA
at +4V d.c. (c) l40mA at -4V d.c. (d) 0.45V peak to peak
of 50c/s sine wave into 75~. Transistors: 6 OC84, OC28.
Suffix A denotes later version with transistors 5 OC84, 2
OC28. Superseded by PS2/57, PS2/57A. 1961.
DD Spec 6.83. ACO. OBSOLESCENT.
Used with GE1/508A. Outputs: Two of 12V at 100mA d.c.
approximately, one positive and one negative with respect
to
earth.
CH1/l2A.
1962.
DD Spec 9.28.
DDHB 9.36.
ACO. OBSOLESCENT.
Improved version of PS2/l3F using two identical PS2/22F

9