Note
Allied Radio catalog 1960 (copyright 1959), p. 389.
Kit or wired.
QST, Nov 1958, p. 113.
CQ, Dec 1958, p. 30.
QST, Aug 1963, p. 88.
QST, Apr 1965 p. 5.
The Challenger ran 70 watts, screen-modulated AM phone on 80–6 meters. CW input was 120 watts on 80–10 meters and 85 watts on 6. The pair of 6DQ6As in the finalran straight through on all bands.