Note
QST, Aug 1970, p. 5.
QST, Dec 1971, p. 113. (specs)
QST, Dec 1973, p. 177.
A cosmetic update
QST, Mar 1975, 192. (specs)
Tempo One Digital
QST, Oct 1975, inside front cover
Essentially the same as the Tempo One, but with a digital display.
QST, Apr 1976, p. 81.
QST, Oct 1976, inside front cover.
QST, Feb 1977, inside front cover.
Tempo One and Tempo One Digital are sold concurrently.
