Note
QST, Jan 1964, p. 167.
QST, Apr 1964, p. 1.
QST, Apr 1965 p. 1.
QST, Dec 1969, p. 1. (SX-122A)
QST, May 1970, inside front cover.
The SX-122(A) is a double conversion superheterodyne circuit, with selectable sideband reception, a product detector, and selectivity from 500 to 5000 Hz in three steps.
Features include: crystal filter, headphone jack, S-meter, bandspread, RF gain, ANL, BF0, antenna trimmer. The rear panel has mute terminals, and a punch-out hole for an SO-239, otherwise the antenna is connected with screw terminals. Requires an external speaker speaker.
Calibrated bandspread for 80, 40, 20, 15, 11, and 10 meters.
It is curious that for this kind of money, the crystal calibrator (HA-7) is optional.
The SX-122A is identical but uses a different optional crystal calibrator (HA-19).
Note small gap in coverage.
Coverage:
535 to 1580 kHz
1720 kHz to 34 MHz
IF: 1st 1650 kHz, 2nd 50 kHz
Modes: AM, CW, SSB
Selectivity: 500, 2500, and 5000 Hz
Sensitivity: better than 0.5 µV
Power: 120 VAC, 85 watts
Tubes (11 total): (2) 6DC6, (1) 6AU6, (1) 6C4, (1) 6EA8, (1) 6BA6, (1) 6BE6, (1) 6BN8, (1) 6GW8, (1) 5Y3, (1) 0A2
References
Review. Popular Electronics, Sep 1969, p. 55.
