Note
QST, Nov 1960, p. 1.
QST, Dec 1960, p. 189. (specs)
QST, Jan 1964, p. 173.
QST, Mar 1965 p. 103.
The HT-40 transmitter and its companion receiver, the SX-140, were available both as “Halli-Kits” and wired and tested. The crystal-controlled, 75 watt rig featured band-switching coverage of 80–6 meters and worked AM phone as well as CW. The final amplifier was a 6DQ5.
References
Review. Popular Electronics, Sep 1961, p. 75.
