The Hallicrafters SX-100 is a General Coverage Communications Double Conversion Superheterodyne Receiver. This ham radio receiver uses 14 tubes and has excellent sensitivity, selectivity, and frequency stability stability. It will receive AM, SSB, and CW. The frequency coverage is 538 KCs to 34 MCs.
The front panel controls include Frequency Tuning (main tuning) and Band Spread with amateur radio bands marked for easy reference, four position band switch, pitch control, Receive/standby switch, Upper and Lower Sideband Selector, Antenna Trimmer, Notch Frequency, Notch Depth, 100 KCs Calibrator on/off, Sensitivity control (RF Gain), Volume control, AVC on/off, Noise Limiter on/off, and four position Selectivity control. Front panel also includes an S-meter and Head Phone jack.
The receiver has an antenna terminal for 300 ohm or with shorting bar in 50 ohm antenna and uses an external 3.2 ohm speaker. The Hallicrafters R-46, R-46A, and R-46B are matching speakers for this receiver. It includes a phono input jack and 500 ohm line output.
Works of 105 to 125 VAC 50 to 60 Cycles
A very good match with the Hallicrafters HT-37 transmitter.
That is how the review might read during its 7 years of production (1955-1962). This was a top of the line receiver and sold new for about $290-325. It weighed about 42 pounds.
You might notice that I used MCs, KCs, and Cycles rather then MHz, KHz, and Hertz. Prior to 1960 frequency was measured in Cycles Per Second (CPS) usually shortened to just cycles. In 1960 the General Conference of Weights and Measures (CGPM) replaced the name for standard of frequency of alternation of electrical current from cycle per second to Hertz and the abbreviation was changed from cps to Hz.
Recent bids EBay run between $484.99 and $98.00. Looking at the photos of the one that went for $484.99 it looked in almost like it did the day it came out of the box new but it was sold as is vacuum tubes light up was only test.