Note
Radio News, Aug 1946, inside front cover.
QST, Jan 1947, p. 144.
QST, Oct 1947, p. 160. (slide rule dial)
QST, Apr 1948, p. 144. ("A" version)
QST, Aug 1952, p. 2. (back on the market)
QST, Jun 1955, p. 104.
Note: The unit was taken off the market from late 1949 or early 1950 until about August of 1952. Collins did not explain why.