Note
QST, Nov 1954, p. 89.
Allied Radio catalog 1956 (copyright 1955), p. 200.
QST, Jul 1956, p. 95. (51SB-B)
Walter Ashe catalog 1957 (probably issued in 1956), p. 3. (version for other transmitters)
Allied Radio catalog 1959 (issued 1958), p. 379.
QST, May 1960, p. 152.
References
Brief technical description. Radio News, Oct 1955, p. 68.
Review. CQ, Feb 1959, p. 53.
