Note
QST, Sep 1952, p. 124.
Model B is the same as Model A, but with the "AQ" Q-multiplier installed.
See QST, May 1955, p. 79.
Walter Ashe catalog 1957 (probably issued in 1956), p. 6.
Allied Radio catalog 1957 (issued 1956), p. 249.
Allied Radio catalog 1959 (issued 1958), p. 378.
Allied Radio catalog 1960 (copyright 1959), p. 395.
Kit from or fully assembled.
Model A dropped after 1955.