Note
QST, Oct 1972, p. 2.
QST, Jan 1973, p. 113.
QST, Apr 1973, p. 137.
QST, Jan 1974, p. 150.
QST, Feb 1975, p. 165.
QST, Oct 1976, p. 121
QST, Apr 1977, p. 157.
Ten-Tec introduced the model 405 linear along with the Argonaut 505. The broad-band amplifier provided band-switching coverage of 80-10 meters and needed but 2 watts drive to produce 50 watts output. Its two panel meters showed power output and SWR. The 405 had an exciter actuated antenna relay. A delay control varied relay drop out from near QSK speed on CW to a longer hold time for SSB. An external 12 VDC source was required.
