The service manual for the Hallicrafters SX-117 communication receiver provides detailed instructions on setting up the receiver, including unpacking, antenna connections, grounding, and power source requirements. It also covers operational guidelines such as speaker and headphone connections, as well as troubleshooting tips like remote receive-standby switching and RF gain control adjustments.
Manual Overview
The Hallicrafters SX-117 service manual provides detailed guidance for technicians focusing on troubleshooting, diagnostics, and calibration. The manual outlines the receiver’s frequency coverage across various bands, including 80-meter to 10-meter bands, with specific IF frequencies and reception modes such as AM, CW, and SSB. Sensitivity levels for AM and SSB/CW are specified, ensuring technicians can verify performance against these benchmarks. Calibration accuracy is noted to be better than 2 KC between adjacent 100-KC calibration points, which is crucial for precise adjustments. The manual also details the selectivity and stability specifications, providing a basis for troubleshooting signal issues. For board-level guidance, the manual includes a block diagram and tube functions, allowing technicians to identify and replace faulty components. The receiver’s power requirements and antenna input impedance are specified, aiding in setup and diagnostics. Additionally, the manual emphasizes proper grounding and lightning protection, which are essential for safe operation. The SX-117’s design supports remote standby control, enabling technicians to integrate it into larger systems effectively.
Quick Issues Covered
- Diagnose power-up failures with voltage checks and tube testing.
- Calibrate frequency accuracy using 100-KC crystal-calibrator oscillator.
- Trace circuits using detailed receiver block diagram and schematics.
Overview
The document provides operating and service instructions for the Hallicrafters Model SX-117 communication receiver. It includes technical specifications such as frequency coverage, sensitivity, selectivity, stability, calibration accuracy, and power requirements. The manual also covers installation instructions, including unpacking, location, antenna connections, grounding, power source, speaker, headphones, and remote receive-standby switching.
Specifications
- Basic Frequency Coverage
- 80-Meter Band 3.5 MC to 4.0 MC
- 40-Meter Band 7.0 MC to 7.5 MC
- 20-Meter Band 14.0 MC to 14.5 MC
- 15-Meter Band 21.0 MC to 21.5 MC
- 10-Meter Band 28.0 MC to 28.5 MC
- 10-Meter Band 28.5 MC to 29.0 MC
- 10-Meter Band 29.0 MC to 29.5 MC
- 10-Meter Band 29.5 MC to 30.0 MC
- IF Frequencies
- 6.5 MC to 6.0 MC (Variable), 1650 KC, and 50.75 KC
- Reception
- AM, CW, and Single Sideband (SSB)
- Sensitivity – AM
- Less than 1 microvolt for 10-DB signal-to-noise ratio
- 3 MC to 30 MC (30% modulation)
- Sensitivity – SSB/CW
- Less than 1/2 microvolt
- 3 MC to 30 MC
- Sensitivity (with HA-10)
- 5 to 10 microvolts
- 85 KC to 3 MC
- Selectivity
- Variable in three steps providing 0.5 KC, 2.5 KC, and 5 KC at 6 DB down
- Stability
- Better than 300 CPS after warmup
- Calibration Accuracy
- Better than 2 KC between adjacent 100-KC calibration points after indexing
- IF Rejection
- More than 50 DB
- In-Band Tweets
- Less than 1/2 microvolt equivalent (within amateur bands)
- Audio Power Output
- 3/4 watt with less than 10% distortion
- AVC Figure of Merit
- More than 80 DB
- Power Source
- 105 volts to 125 volts, 50/60 cycles
- Power Consumption
- 70 watts
- Number of Tubes
- 14 (one not supplied), plus four silicon diodes
- Antenna Input Impedance
- 50 ohms to 70 ohms unbalanced; rear-mounted RCA-type phono jack accepts RCA-type phono plug
- Low Frequency Input
- High impedance to first mixer grid; for use with external-tuned circuit from 85 KC to 3.0 MC, RCA-type phono jack accepts RCA-type phono plug
- Remote Standby Control
- Rear-mounted screw terminals
- Dimensions
- 7-3/4 inches high, 15 inches wide, and 14-3/4 inches deep
- Net Weight
- 18-1/2 pounds
- Shipping Weight
- 21 pounds (approximately)
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
The installation/setup highlights for the Model SX-117 communication receiver include the following:
1. Unpacking: After unpacking, check the receiver for any damage that may have occurred during transit. If damage is apparent, file a claim with the carrier immediately.
2. Location: Place the receiver in a location that allows for free air circulation through the ventilation holes and openings. Avoid warm locations and direct air blasts from fans. Do not place objects on the cabinet that could impair ventilation.
3. Antennas: The receiver uses an unbalanced 50-ohm to 70-ohm input circuit. Suitable antennas include dipole or beam antennas using 50-ohm to 70-ohm coaxial transmission lines. Lightning protection should be provided in compliance with local codes.
4. Grounds: Bond all station equipment together with heavy copper wire or braid and connect to a cold-water pipe or earth ground. An external chassis ground terminal is provided for this purpose.
5. Power Source: The receiver operates from a 105-volt to 125-volt, 50/60-cycle AC power source with a power consumption of 70 watts. Ensure the power source is correct to avoid damage.
6. Speaker: A terminal strip is provided for connecting an external speaker. A 3.2-ohm speaker can be used directly, while a matching transformer is needed for speakers with different impedances.
7. Headphones: The headphone jack on the front panel disables the 3.2-ohm speaker output when used. Headphone impedance is not critical, and any ranging from 50 ohms to 2000 ohms will work.
8. Remote Receive-Standby Switching: The receiver can be disabled remotely by removing the jumper between the STANDBY and G terminals and connecting a switch or relay. The RF GAIN control can also disable the receiver in Transmit mode by turning it fully counterclockwise.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
The manual does not contain any explicit safety warnings or precautions.
Download 2 Service manual (PDF – 902.1 KB)
Hallicrafters SX-117 Model 2 Service Manual: Troubleshoot and calibrate radio equipment efficiently. File size: 902.1 KB.
- Brand: Hallicrafters-sx-117-operation-and-service-manual
- Model: 2
- Type: Service manual
- File size: 902.1 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download 2 service manual (PDF)
Hallicrafters SX-117 Operation and Service Manual Overview
The Hallicrafters SX-117 is a classic shortwave communications receiver designed for amateur radio enthusiasts and professional operators alike. Known for its robust construction and reliable performance, the SX-117 covers a wide frequency range, allowing users to tune into various international broadcasts, amateur bands, and utility transmissions. This manual provides detailed instructions on operation, servicing, and maintenance to ensure optimal functionality and longevity of the receiver.
Main Features and Specifications
- Frequency Coverage: 3.8 to 18 MHz across multiple bands
- Superheterodyne receiver design with dual conversion
- Selectable bandwidth filters for improved selectivity
- Built-in BFO (Beat Frequency Oscillator) for CW and SSB reception
- Analog dial with calibrated frequency markings
- RF gain and AF volume controls for signal clarity
- External speaker and antenna connections
- Robust metal chassis with durable knobs and switches
Basic Usage and Operation Tips
To operate the SX-117, first connect a suitable antenna and power source. Turn on the receiver and select the desired frequency band using the band switch. Use the main tuning dial to locate the desired station, adjusting the RF gain and volume controls for optimal audio clarity. Engage the BFO when listening to Morse code (CW) or single sideband (SSB) transmissions to improve signal intelligibility. Regularly calibrate the dial using known frequency markers to maintain tuning accuracy.
Troubleshooting and Maintenance Notes
If the receiver experiences weak or distorted audio, check antenna connections and ensure tubes or transistors are functioning properly. Clean all controls and switches periodically to prevent static or signal dropouts. Replace any blown fuses with the correct rating as specified in the manual. For persistent issues, consult the detailed schematic and alignment procedures provided to perform proper servicing. Always discharge capacitors before servicing to avoid electric shock.
Safety Reminder
Always disconnect the SX-117 from power before performing any maintenance or repairs. Handle internal components with care to avoid damage or injury. Use insulated tools when working inside the receiver, and avoid contact with high-voltage areas. Follow all safety instructions in the manual to ensure safe and reliable operation of your Hallicrafters SX-117 receiver.