Return to Early GE Computers
A Sampling of circuit cards from a
Shipped from about mid 1960 through about 1964
General Electric GE-225 Computer,
Buzz Heinzen, of Russellville, Arkansas kindly sent me a selection of GE-225 cards he has saved. Many years ago he purchased a GE-225, but he finally threw it, and the documentation out. :-(( The logic family is RTL (Resistor Transistor Logic) (inverting) , using "speed up" capacitors across the input resistors, and clamped output voltage.
These are "two sided" boards, ie, circuits on the two sides of the card, no internal layers or traces. The cards can be "keyed", have notches in the connector area, to prevent inserting the wrong card into the barriers in the socket. The cards are 5 3/8 inches wide, 10 7/8 inches long including connector pins, about 1/16 inches thick, and an unknown intercard distance.
reverse side