Note
QST, Jul 1952, inside back cover.
See notes from National: QST, Aug 1952, p. 71.
Allied Radio catalog 1953 (copyright 1952), p. 37.
QST, Apr 1954, p.111.
QST, Nov 1958, p.199.
QST, Jan 1960, p. 145.
QST, Dec 1963, inside back cover.
QST, Jan 1964, inside back cover.
QST, Oct 1964, p. 111. (note the "In recent years..." comment)
HRO-60T — tabletop
HRO-60R — rack mounted
References
Making 15 Meter Coils. CQ, Jan 1964, p. 52.
Matching speaker is the HRO-60TS (table top). Also available in rack mount as the HRO-60RS.
