Note
QST, Jan 1951, inside back cover.
QST, MAy 1955, p. 129.
Radio News, Sep 1951, p. 142. ("thousands sold")
Allied Radio catalog 1952 (copyright 1951), p. 136.
Allied Radio catalog 1955 (copyright 1954), p. 188.
References
Brief description. Radio News, Apr 1951, p. 92.
More bandspread. Popular Electronics, Dec 1955, p. 62.
