Note
QST, Apr 1964, p. 5.
QST, Apr 1965 p. 119.
QST, Jan 1966, p. 108.
QST, Jul 1967, p. 127.
QST, Jan 1968, p. 125.
QST, Feb 1968, p. 121. (advertised as the "new" HXL-1) (inside photo)
QST, Nov 1969, p. 4.
QST, Jan 1970, p. 4.
QST, Nov 1970, p. 160. (this could be a factory close-out)
The HXL-One linear amplifier used a pair of 572A triodes in grounded-grid. It had a self-contained solid-state power supply. Hammarlund boasted that the amp could be run "key down for more than an hour" at a kilowatt input. It covered 80-10 meters and was rated at 1500 watts PEP on sideband, 1000 watts on CW, and 250 watts on AM. A later version using 572B tubes ran 2 KW PEP; $395.00, 1963.
Review: QST, Jun 1964, p. 55.
HXL-1, written on the front panel as HXL-ONE.
