Note
Kit or wired.
QST, Oct 1955, p. 152.
QST, Sep 1957, p. 134. (IIA)
QST, Jan 1958, p. 176 (IIB) (reference in ad but no photo)
QST, Apr 1958, p. 114. (IIB) (official reveal)
The IIA and IIB were sold concurrently (QST, Aug 1958, p. 125).
Review: CQ, May 1956, p. 35
Review (Phasemaster II): CQ, May 1956, p. 35.