QST, May 1976, p. 6.
QST, Jun 1976, p. 90. (partial inside view)
TS-820S
QST, Jul 1977, p. 132.
QST, Aug 1977, back cover. (good photo)
QST, Mar 1982, p. 145. (close out)
References
Review. Popular Electronics, May 1977, p. 90.
Adding a QSK system. QST, Feb 1981, p. 32.
Frequency jumps. QST, Feb 1982, 50.
