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Three UNIVAC plug-in logic modules, approx. 3 x 5 in., manufactured Sperry UNIVAC St. Paul, Minnesota plant. Each board features an 18-contact edge connector and discrete transistor, diode, resistor, and capacitor circuitry. Likely used for logic gating, switching, buffering, or signal conditioning in mid-1960s UNIVAC computer systems. Transistors are Texas Instruments brand.
Three UNIVAC plug-in logic modules, 2-3/4 x 6 in, manufactured in Sperry UNIVAC Utica, NY plant. Each features an 18 contact edge connector and discrete-component circuitry of transistors, diodes, resistors, and capacitors. These modules likely performed digital logic functions such as gating, switching, signal inversion, and buffering in 1960’s UNIVAC 1004 computers or related equipment. Boards are made of high-grade Micarta 65M24 phenolic substrate and use germanium transistors.
UNIVAC Power Transistor Circuit Board, with gold plating. Circa 1960s; Utica, NY plant, measures 3 x 5 inches, with two large black Motorola EM135 metal-case power transistors, two wire-wound power resistors, and heavy copper conductors. Designed for relatively high-current electronic applications, possibly including power regulation, switching, or peripheral equipment control. Gold plating was used because it provides: Corrosion resistance, Reliable conductivity, Durability, and Long-term reliability.
Large Sperry UNIVAC 1979 logic board with over 80 IC's, multiple transistors and other components, measuring 15-1/2 inches by 13-1/2 inches. Attached connector ribbon has original 1979 date.
UNIVAC 5 x 7 inch logic board for 9200 family mainframe series of computers, dated 1972. Nice example of toroids, transistors and highly-populated component circuitry. This format became one of the most popular format sized used by UNIVAC from the 1960’s to the early 1980s. Also used in a variety of related systems.
Vacuum tubes,
Since the early 1980s, the history of computer technology has been a growing passion for Mark Greenia, (UMass Amherst --1976).
Fascinated by the evolution of computer technology during the 1950s, particularly the pioneering work of ERA, Eckert-Mauchly, Remington Rand, and others, he began researching and compiling chronologies of early computer developments. This interest eventually expanded into collecting historic computer hardware and vintage electronic components.
To help preserve and share this important technological history, he established the “Computer History Archives Project” (CHAP) on YouTube in 2015.
With invaluable contributions from CHM, VIPClubMN, IBM Archives, and PeriscopeFilm, the archive now features over 200 vintage mini-documentaries and restored computer industry films dating from the 1940s through the 1970s.
He has also been a longtime supporter of the RICM. Recently his son Jason, who helps manage his collection, donated approximately 22 historic computer artifacts. These include vintage UNIVAC logic boards and vacuum tubes dating from 1958 through 1972.
We at RICM very much appreciate this donation.
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