1953: Selectron Tube - Computer Memory

An Illustrated History of Computer Memory
1953: Selectron Tube - Computer Memory

Developed between 1946 and 1953 by Jay Raichman at RCA, the selectron tube was the final shot at making tube memory popular, but never made it into production due to the popularity of magnetic core memory. The selectron tube was 10 inches long and measure 3 inches in diameter. The device used an indirectly heated cathode running up the middle, surrounded by two separate sets of wires and offered a storage capacity of 256 bits in the proposed production device, but was claimed to be able to scale to up to 4,096 bits.

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