Collection of IBM circuit board assemblies manufactured at the IBM Havant UK facility over the period 1950 to 1993.
Pluggable single valve cicuit assembly 1950-1960, 1 cicuit, 4uS switching time
Standard modular system card, 1970-1975 - paxolin based single sided printed circuit board with edge connectors, mates with motherboard, two circuits, 1uS switching time.
Solid logic technology card, 1965-1970, one eigth inch pich, fibre glass double sided printed circuit board with internsl ground and voltage planes.
Populated board, 1965-1975, using card on board technology, one eigth inch pitch fibre glass cards and board, double sided with internal ground and voltage planes, through plated holes, card capacity 36 independent circuits, switching time 30nS, Board fitted for external interconnecting wiring and board to board flexible crossover cabling.
FET memory board. 1973-1975, 8Kb, one eigth inch pitch double sided fibre glass board with internal ground and voltage planes together with double sided signal paths.
Vendor Technology Logic (CTL) Card. 1971-1975, 400 circuits per card, switching time 10nS
Monolithic System Technology (MST) Card 1978, one eigth inch pitch fibre glass board with internal ground and voltage planes together with internal and external signal planes, maximum capacity of 2000 circuits per card with an 8 nS switching time
New Grad Card. 1983. card on board technology with four row edge mounted connector assemblies. One eigth inch pitch internal ground and voltage planes together with internal and external signal planes. Mounting large square ceramic modules, 4nS switching with maximum capacity of 27000 circuits.
Mixed Technology Card 1988. one tenth inch pitch. surface mounted standard TTL modules and ROM.
IBM AT 512k system board 1986. One tenth inch pitch fibre glass board - ground and voltage planes, internal - signal planes, internal and external. 286 microprocessor chip installed.
Mixed Technology Card 1980-1985. one tenth inch pitch, internal ground and voltage planes - internal and external signal planes.
Flexible circuits 1988-1993. one empty board, three flexible circuits with components mounted.
Accessories for Solid Logic Technology Cards 1965-1970. single extenders, jumper leads and board clamps.
empty cards, size 50x50mm and 50x100mm. One tenth inch pitch , internal ground and voltage planes.
Board-to-board flat ribbon flexible inter connecting cables with transmission line characteristics.
Power distribution wiring loom.
