Note
QST, Jun 1955, p. 101.
Walter Ashe catalog 1957 (probably issued in 1956), p. 10.
QST, Jun 1958, p. 175.
QST, Jul 1958, p. 141. (a few specs)
Allied Radio catalog 1959 (issued 1958), p. 382.
Allied Radio catalog 1960 (copyright 1959), p. 403.
Designed to match the T-90 transmitter and R-9 receiver. The Z-Match antenna coupler covered 80-10 meters without band switching, matching 10 to 2000 ohm loads, balanced or unbalanced. It contained a forward/reflected power meter.