Harwell Computer Parts

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General Component Count

Relay Set/Unit Rack

Position #

Relays

3000

Contact

Springs

Relays

High Speed

Contact

Springs

Relay

Thermal

Relay

Main Coil

Dekatron

Tubes

Valves

Lamps

6v

T1 1E1 16 196 1
T2 1E2 16 196 1
U 1E3 14 240 1
B 1D1 14 183 1 1
R1 1D2 9 138 1
R2 1D3 9 138 1
P1 1B1 6 102 6 18 1
P2 1B2 6 102 6 18 1
W 1A1 11 144 1
X 1A2 4 16 1
Z 1A3 9 64 2 6
D1 2E1 10 174 2
D2 2E2 10 174 2
D3 2E3 10 174 2
D4 2D1 10 174 2
D5 2D2 10 174 2
+E/-E 2D3 10 132 2
C 2C1 16 272 1 3 1
Q 2C2 11 154 1
F 2C3 15 138 1 3
O 2B1 18 255 1
A 2B2 15 189 1
J 2B3 19 243 1 3 1
L2 2A1 13 165 1
L1 2A2 13 165 1
N 2A3 11 159 1
PULSE GENERATOR UNIT M 3E 1 6 1 29
ACCUMULATOR UNIT GA 3D 18 282 1 8 10 8
SHIFT RELAY UNIT A 3C 27 450 18
ACCUMULATOR UNIT GB 3B 20 344 8 8 12
TRANSLATOR UNIT V 3A 13 194 9 27 1 5
MEMORY STORE 4 4D 18 264 90 12
MEMORY STORE 3 4C 18 264 90 12
MEMORY STORE 2 4B 18 264 90 12
MEMORY STORE 1 4A 18 264 90 12
MEMORY STORE 8 5D 28 484 90 12
MEMORY STORE 7 5C 18 264 90 12
MEMORY STORE 6 5B 18 264 90 12
MEMORY STORE 5 5A 18 264 90 12
MEMORY STORE 9 6D 28 484 90 12
Totals 566 8353 26 78 1 1 828 52 176


Specific Parts List

TYPE # USED INFO
EL33 4 Output Pentrode - Details
EL360 9
85A2 2
8D3 9
VR150/3 1
12AT7 4
ECC91 10 double triode with a common cathode - Details
EB91 2 double signal diode - Details
GC10B 1 computing counter (octal base) - Details
G1/371K 6 High-Speed Trigger - Details
GTE175M 34
ECC81 (12AT7) 2
6AM5 1
6J6 (ECC91) 4
6AL5 (EB91) 2
E90CC (6J6) 35
E92CC (6J6) 4
GS10C 1 Details
GC10A 16 (Non-Store Functions) - Details
GC10A 810 (Store Registers) - Details
PO3000 Relay switching functions - Datasheet (from Sam Hallas' Telecom Pages)