QST, Jan 1978, p.176.
QST, Jan 1980, p. 151.
The MFJ 901 Versa Tuner used an air-wound inductor with 12 taps. It matched a variety of antennas from 160–10 meters. Besides coax-fed antennas and random wires, its 4:1 balun also enabled it to match balanced feedlines; $59.95,
