SKU: 98.2
Memory Board from Military Computer manufactured in the USSR in 1990
The Ferrite Core Memory Board was removed from RAM cube 40-820-500-01 which was in turn a part of Military Computer.
The memory cube 40-820-500-01 was used as part of the automated combat control system of the Polyana-D4 anti-aircraft missile brigade.
Each cube consisted of nine PBM plates. The PBM ferrite plate is of frameless type. In it, ferrite rings do not hang on tensioned threads, but are laid on a solid base of the plate and filled with a protective transparent compound.
The total memory capacity of the cube is 36 kilobytes.
The last photo shows the appearance of the 40-820-500-01 cube for information.
The ferrite memory matrix was manufactured at the Astrakhan plant "Progress".
The amount of memory is 32768 bits or 4 Kb of data. Each side has 16384 bits. Ferrite field of each side 128x128 (16 groups, each 32x32). Ferrite cores are laid on both sides on a textolite plate and filled with a transparent protective silicone compound.
Approximate Dimensions:
board size: 4.33 x 4.33 inches
Copper mesh size: 2.99 x 2.68 inches
Weight: 1.9 oz
According to enthusiasts restoring operable systems using ferrite memory, PBM memory modules are the fastest ferrite memory ever made in the USSR.