RCA 6499  
Written by Accutron on 2009-04-04  

The RCA 6499 is an unusual type of data storage tube called a Radechon, first produced by RCA in 1956, and used in such venerable systems as the SAGE defense computer. The 6499 uses an electron beam to store data on a charged target. Much like modern PC DRAM, the contents of memory must be continually refreshed in order to be maintained. The 6499 has a maximum storage capacity of 16,000 random-access bits, though its practical capacity is somewhat less, due to splatter on adjacent bits from the electron beam.

This article is part of the [Detection & Imaging Tubes] exhibit.

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