Second source on tubes

Taylor, N. H.
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URI
http://hdl.handle.net/1721.3/41503
Date
1955-05-25
Abstract
In a letter dated 28 April 1954 from J. W. Forrester to C. McElwain, it was stated that certain tubes are important components in the FSQ-7 which should have a second source. Subsequent action led to a recommendation that a second source for each of these types be set up.
Description
This note emphasizes two minimum requirements on any program if it is to meet over-all System requirements: interchangeability of tubes from the two sources and process and quality control at each source.
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