The manual for the Hammarlund HQ-110A/VHF and HQ-170A/VHF receivers provides detailed instructions for setting up, operating, and troubleshooting the equipment, including how to receive 6-meter and 2-meter signals using specific bandswitch positions and antenna connections. It also explains the improved sensitivity on the 6-meter band due to a low noise pre-amplifier and includes a field alignment procedure requiring specific tools and a signal generator.
Manual Overview
The Hammarlund HQ-110A/VHF and HQ-170A/VHF receivers are designed for amateur radio frequencies from 160 meters to 2 meters, with enhanced sensitivity on the 6-meter band due to a low-noise 6CW4Y pre-amplifier. Troubleshooting involves ensuring proper antenna connections and using separate antennas for 6 and 2-meter operations. Calibration requires a signal generator and alignment tools, with specific procedures for tuning coils and capacitors to peak performance. For example, L205 and L206 should be adjusted for peak readings on a meter when tuned to 50 Mc, while L211 is tuned for minimum readings. Error diagnostics are not explicitly detailed, but alignment issues can be addressed by following the alignment procedure, which includes unsoldering and resoldering specific leads and adjusting various coils for maximum or minimum readings. The manual emphasizes the importance of using a good antenna and following the recommended alignment procedure to maintain optimal receiver performance.
Quick Issues Covered
- Diagnose 6CW4 pre-amplifier power-up failures on HQ-110A/VHF.
- Calibrate L205 and L206 for optimal 6-meter signal reception.
- Trace circuit using HQ-110A/VHF schematic for alignment issues.
Overview
The Hammarlund HQ-110A/VHF and HQ-170A/VHF are receivers capable of tuning all amateur frequencies from 160 meters through 2 meters, providing reception for CW, AM, and SSB signals. The manual covers operation instructions, including how to receive 6-meter signals and the importance of using separate antennas for 6 and 2-meter operations. It also details the theory of operation, including the use of a low noise pre-amplifier stage and a frequency converter for improved sensitivity. The manual includes a field alignment procedure and emphasizes the importance of using a good antenna for optimal performance.
Specifications
“”
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
To receive 6 meter signals (50 to 54 Mcs), place the bandswitch in the 50 to 54 Mc position and push in the volume control knob. Connect a suitable antenna to the proper antenna terminal. For 2 meter signals (144 to 148 Mc), pull out the volume control knob to turn on frequency converter stages, which change 144 to 148 Mc signals to 50 to 54 Mc signals. When not receiving 2 meter signals, it is recommended to push in the volume control knob to reduce power consumption. Separate antennas are recommended for 6 and 2 meter operation, and a switching unit should be used if a combination 6/2 meter antenna is desired. The sideband switch is reversed on six and two meters, resulting in the upper sideband being received in the lower sideband position and vice versa.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download ADDENDUM Manual (PDF – 1.4 MB)
Instruction book addendum for Hammarlund HQ-170A 2-Meter Converter and 6-Meter Pre-Amplifier; assists in troubleshooting and calibration.
- Brand: Hammarlund-hq-170a-2-meter-converter-6-meter-pre-amplifier-instruction-book
- Model: ADDENDUM
- Type: Manual
- File size: 1.4 MB
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 ADDENDUM manual (PDF)
Overview
The Hammarlund HQ-170A 2-Meter Converter with 6-Meter Pre-Amplifier is a specialized radio frequency device designed to enhance signal reception and transmission in amateur radio operations. This converter allows operators to extend the frequency range of their existing receivers, enabling clear communication on the 2-meter band while the integrated 6-meter pre-amplifier boosts weak signals for improved clarity and range. Ideal for amateur radio enthusiasts, this equipment provides reliable performance with precise frequency conversion and amplification.
Main Features and Specifications
- Frequency Conversion: Converts 2-meter band signals for enhanced receiver compatibility
- 6-Meter Pre-Amplifier: Provides low-noise amplification for weak signals
- High Sensitivity: Improves reception of faint transmissions
- Compact and Durable Design: Suitable for portable and fixed station use
- Low Power Consumption: Efficient operation for extended use
- Easy Integration: Compatible with a wide range of amateur radio receivers
Basic Usage and Operation Tips
To operate the HQ-170A converter, connect the input antenna to the 6-meter pre-amplifier input and the output to your receiver’s antenna port. Ensure all connections are secure to prevent signal loss. Power the unit according to the manual specifications, typically from a regulated DC source. Adjust the converter tuning controls slowly to achieve optimal signal clarity. Regularly monitor signal strength and adjust pre-amplifier gain as needed to avoid distortion or overload.
Troubleshooting and Maintenance
If you experience weak or distorted signals, first verify all cable connections and power supply levels. Inspect the device for any visible damage or corrosion on connectors. Clean connectors periodically with appropriate contact cleaner to maintain signal integrity. If the unit fails to power on, check fuse status and replace if necessary. For persistent issues, consult the detailed troubleshooting section of the manual or contact authorized service centers.
Safety Reminder
Always disconnect power before performing any maintenance or adjustments. Use only the recommended power supply to avoid damage or electrical hazards. Operate the device in a dry, well-ventilated area to prevent overheating. Follow all local regulations regarding radio frequency equipment use to ensure safe and legal operation.
More manuals from Hammarlund
- Hammarlund-xc-100-crystal-callibrator-service MANUAL – Service manual (PDF)
- Hammarlund-xc-100-crystal-callibrator-service-manual 1 – Service manual (PDF)
- Hammarlund-urc-51-schematics 1 – Manual (PDF)
- Hammarlund-urc-51 SCHEMATICS – Manual (PDF)
- Hammarlund-urc-51-operation-service MANUAL – Service manual (PDF)