Production Year 1956 - 1961 at $295.95
The Hallicrafters SX-100 is a 14 tube and 4 band dual conversion receiver covering 538khz to 1580khz and 1.72mhz to 34mhz. The I.F. frequencies are 50.5khz and 1650khz. The features of this receiver include a calibrated bandspread for 10 through 80 meters, selectable side band(USB/LSB), BFO, ANL, Antenna Trimmer, Crystal filter, a delayed AVC, Variable Selectivity from 500hz to 5khz, an S-meter, Notch filter, 100khz crystal calibrator and gear driven fly wheel tuning with Aluminum dials.
The power source is 120 volts AC or 120-240 volts AC with optional universal power transformer. The tubes that are used are as follows, a 5Y3 = Rectifier, OA2 = Voltage Regular, 6K6 = Audio Output, 6SC7 = 1st Audio & BFO, 6BJ7 = Detector, AVC and ANL, Three 6BA6 tubes used as the 1650khz IF, 2nd Mixer and 50.5khz IF, Two 6AU6 tubes in use as a 1st Mixer and Crystal calibrator, 6CB6 = RF amplifier and a 12AT7 as the 2nd Conversion Oscillator.
The production run produced a Mark 1, 1A and 2, 2A with very slight differences between them. The receiver featured on this page is the Mark 2A version.