Note
QST, Mar 1955, p. 81.
QST, Mar 1955, p. 153.
QST, Apr 1955, p. 2. (prices)
QST, Sep 1955, p. 2. (a few details)
QST, Jul 1956, p 2. (optional gear reduction tuning knob)
Walter Ashe catalog 1957 (probably issued in 1956), p. 9.
The KWS-1 was the Gold Dust Twins' transmitter sibling. Paired with a 75A-4, it not only defined the ultimate mid-50s amateur station but was also a key component in the Strategic Air Command's Big Talk communications network. Its complement of 33 tubes included two 4X150As in the final amplifier. Later versions used a pair of 4X250Bs. It covered the 80, 40, 20, 15, 11, and 10 meter bands, producing 1 KW on SSB, CW, and 650 watts AM.
The latter mode was implemented by transmitting one sideband plus carrier.
SSB generation was via balanced modulator/mechanical filter. It used grid-block keying on CW. It shared the PTO tuning and 1 kHz dial calibration of the 75A-4, but lacked the receiver's 160 meter band coverage. The exciter unit could be operated sitting atop the power supply cabinet or separated for placement next to the receiver. The units together stood 40.5 inches tall and had a combined weight of 223 lbs. A lower-cost version, the KWS-1 K was available minus the high-voltage power supply and final amplifier.
Production numbers of the KWS-1 transmitter totaled about 1600 units.
Review: CQ, Apr 1955, p. 20.
Brief technical description. Radio News, Oct 1955, p. 69.
Allied Radio catalog 1957 (copyright 1956), p. 239.
Allied Radio catalog 1958 (copyright 1957), p. 263.
Adapter for 40 meters: CQ, Aug 1962, p. 32.
