Note
QST, Nov 1962, p. 1.
QST, May 1964, p 1.
QST, Feb 1965, p. 1.
Allied Radio catalog 1966 (copyright 1965), p. 362.
The Hallicrafters SX-117 is a compact, triple-conversion superheterodyne communications receiver introduced by The Hallicrafters Co. in the early 1960s. Designed primarily for amateur radio operators, it features selective coverage of the primary ham bands from 80 through 10 meters, as well as WWV (9.5–10.0 MC). It can also be configured for general coverage across most of the 85 kHz to 30 MHz range using auxiliary crystals and an optional low-frequency tuner (Model HA-10). It is designed to match the HT-44 transmitter.
Built with extensive use of aluminum for the chassis, panel, and cabinet, the receiver was significantly lighter (18.5 lbs) and smaller than many of its predecessor desk models.
– Frequency Coverage (MHz):
3.5-4.0
7.0-7.5
14.0-14.5
21.0-21.5
28.5-29.0
– Optional band segments (MHz):
9.5-10.0
28.0-28.5
29.0-29.5
29.5-30.0
– Modes: AM, SSB, CW.
– Conversion System: Triple-conversion superheterodyne design.
– IF Frequencies:
First IF: 6.0–6.5 MHZ
Second IF: 1650 KHz
Third IF: 50.75 kHz
– Oscillators: Crystal-controlled first and third conversion oscillators paired with a high-stability, transmitter-type Variable Frequency Oscillator (VFO).
– Selectable Bandwidth: Variable in three steps at 6 dB down:
500 Hz, 2.5 kHz}, and 5 kHz}
– Selectable Sideband Reception: Passband tuning allowing independent upper USB or LSB.
– Rejection Filtering: Built-in variable T-Notch filter for removing interfering heterodynes within the IF passband.
– Detectors: Product detector for SSB/CW reception and an envelope detector for AM.
– Automatic Volume Control (AVC): Amplified AVC featuring fast-attack/slow-release for SSB/CW and fast-attack/fast-release for AM.
– Drive Mechanism: Backlash-free combination pinch and gear drive tuning.
– Calibration & Tuning: Integrated 100 kHz crystal Calibrator.
– Noise Limiter: IF-type noise limiter for impulse noise and key-click suppression.
– Sensitivity: Less than 0.5 uV on SSB/CW and less than 1.0 uV AM (for a 10 dB signal-to-noise ratio).
– Fixed-Channel Mode: The VFO can accept a crystal to operate as a crystal-locked oscillator for fixed-frequency channel operation.
Tubes (13 total): (2) 6DC6, (3) 6EA8, (1) 12AT7, (2) 6BA6, (2) 6BE6, (1) 6BN8, (1) 6GW8, (1) 6AU6, (4) silicon diodes.
Power: 120 VAC, 70 watts
Brief description. Electronics World, Mar 1963, p. 98.
Review: QST, May 1963, p. 50.
Review: CQ, Aug 1964, p. 49.
