Note
QST, Oct 1958, p. 104.
CQ, Oct 1958, page 27.
QST, May 1965, p. 5.
CQ, May 1965, p. 9.
QST, Jul 1966, p. 131.
CQ, Feb 1967, p. 113.
Allied Radio catalog 1968 (copyright 1967), p. 177.
Johnson’s 250-23-3 Matchbox provided band-switching coverage of 80–10 meters. It matched balanced or unbalanced loads to transmitters having unbalanced outputs, although it primarily was designed for antennas with balanced feedlines.
Review: QST, Sep 1959, p. 46.
