Note
QST, Jan 1955, pp. 80–81.
QST, Jan 1955, p. 115.
QST, Jul 1955, p. 107. (Good inside view)
CQ, Mar 1962, p. 128. (Close out)
In April, 1957, Johnson bought a four-page full color insert in QST and CQ magazines.
The concept of a desk-based or "package" radio station was first attempted by Kluge Electronics in 1946 with the "California Kilowatt." Johnson choose to use a somewhat less integrated (and subsequently more versatile) approach, and had modest success with the Desk Kilowatt. Hallicrafters designed an integrated station (the SR-500) in 1955, with somewhat less success.
Desk accessory optional: $123.50 (specify right or left hand)
References
Brief technical description. Radio News, Oct 1955, p. 71.