Hammarlund-hq-170-instructionand-service MANUAL – Service manual (PDF)

The Hammarlund HQ-170 Communications Receiver manual provides detailed instructions for setup, operation, and troubleshooting of the receiver, including information on tube functions, power connections, and antenna installation. It also describes features such as the selectivity and sideband selectors, noise limiter, and the Auto Response feature, which enhance the receiver's performance in various signal conditions.

• Brand: Hammarlund
• Model: MANUAL
• Type: service manual
• File size: 14.7 MB

Manual Overview

The Hammarlund HQ-170 service manual provides detailed guidance for technicians on maintaining and troubleshooting this communications receiver. The manual emphasizes a systematic troubleshooting flow, focusing on diagnosing issues through error codes and signal diagnostics. Calibration and adjustments are crucial for optimal performance, with specific instructions on using the built-in 100 kHz crystal calibrator for dial calibration accuracy. The manual outlines the board-level guidance necessary for addressing component-level issues, including the tube complement and their functions, which are essential for understanding signal processing within the receiver. The HQ-170 features a triple conversion superheterodyne design, with adjustable RF tuning and selectivity controls to optimize reception under various conditions. Technicians are advised on using the receiver’s manual sensitivity control to prevent overloading from strong signals and employing the slot filter to manage co-channel interference. The manual also covers installation procedures, including speaker and power connections, ensuring proper setup for reliable operation.

Quick Issues Covered

• Diagnoses power-up failures due to incorrect voltage settings.
• Guides calibration using built-in 100KHz crystal calibrator.
• Adjusts slot filter to eliminate co-channel interference.

Overview

The HQ-170 is a communications receiver designed by Hammarlund Manufacturing Co., Inc. It is a seventeen-tube triple conversion superheterodyne receiver, with double conversion on the 160 and 80 meter bands. The receiver is built to provide reliable performance for AM, SSB, and CW signals under challenging conditions. It features a self-contained power supply, precise RF tuning, a built-in crystal calibrator, and various controls for signal reception optimization. The HQ-170C model includes an automatic electric clock timer, while the HQ-170E export model operates on different power specifications. The manual covers technical descriptions, operating instructions, and service information for the receiver.

Specifications

• TUBE COMPLEMENT
• Vi 6BZ6 Pentode RF Amplifier
• V2 6BE6 Pentagrid Converter Ist Mixer
• V3 6BE6 Pentagrid Converter Converter or 455 Kes IF Amplifier
• V4 6BA6 Pentode 455 Kes IF Amplifier
• V5 6BE6 Pentagrid Converter Converter
• V6 6BA6 Pentode 60 Kes IF Amplifier
• V7 6BAG Pentode 60 Kes IF Amplifier
• v8 6BV8 Double Diode-Triode 60 Kes IF Amplifier, AVC, AM Det.
• v9 12AU7 Double Triode SSB Product Detector
• v10 6AL5 Double Diode Noise Limiter
• Vil 6BZ6 Pentode Crystal Calibrator Oscillator
• V12 6C4 Triode High Frequency Oscillator
• Vv13 12AU7 Double Triode 60 Kes BFO, “S” Meter Amplifier
• vi4 OB2 Gas Filled Diode Voltage Regulator
• vi15 5U4-GB Twin Diode Rectifier
• V16 6AV6 Double Diode-Triode First AF Amplifier, Delayed AVC Gate
• V17 6AQ5 Pentode AF Output
• OPERATING FREQUENCY
• 60 cps, 105-125 volt a-e source
• 50-60 eps, 115-230 volt a-c source (export model)
• POWER CONSUMPTION
• Approximate power consumption 120 watts
• BAND COVERAGE
• 160 meter band 1.8 to 2.0 mc
• 80 meter band 3.5 to 4.0 mc
• 40 meter band 7.0 to 7.3 mc
• 20 meter band 14.0 to 14.4 mc
• 15 meter band 21.0 to 21.6 mc
• 10 meter band 28.0 to 30.0 mc
• 6 meter band 50.0 to 54.0 mc
• FILTER
• Built-in 100Kes crystal calibrator
• Adjustable slot filter with up to 40 db attenuation
• AVC
• Fast attack (charge), adjustable decay AVC
• DETECTOR
• Separate linear product detector
• NOISE LIMITER
• Continuously variable (audio type) noise limiter
• S METER
• Indicates carrier level
• AUTO RESPONSE
• Automatically narrows and widens frequency range of audio output

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

Refer to the PDF for details.

Operation

Refer to the PDF for details.

Troubleshooting & Error Codes

Refer to the PDF for details.

Safety & Warnings

Refer to the PDF for details.

Download MANUAL Service manual (PDF – 14.7 MB)

Hammarlund HQ-170 Service Manual: Troubleshoot and calibrate radio equipment with detailed instructions. PDF size: 14.7 MB.

• Brand: Hammarlund-hq-170-instructionand-service
• Model: MANUAL
• Type: Service manual
• File size: 14.7 MB

Overview

Brief overview of the product.

Specifications

• Key spec 1
• Key spec 2

Controls & Indicators

Control panel/button layout.

Installation / Setup

1. Step 1…
2. Step 2…

Operation

Basic usage, modes, cycles.

Troubleshooting & Error Codes

Safety & Warnings

• Important warning…

Downloads

Download MANUAL service manual (PDF)

Overview of the Hammarlund HQ-170

The Hammarlund HQ-170 is a classic communications receiver designed for high-performance radio signal reception across a broad frequency range. Renowned for its durability and precision, this receiver is ideal for amateur radio enthusiasts, vintage electronics collectors, and professionals requiring reliable shortwave and HF band monitoring. The HQ-170 delivers clear audio and stable tuning, making it a trusted choice for both casual listening and technical applications.

Main Features and Specifications

• Frequency Coverage: 540 kHz to 30 MHz
• Multiple Bandwidth Selections for Enhanced Signal Clarity
• Built-in BFO (Beat Frequency Oscillator) for SSB and CW Reception
• High Sensitivity and Selectivity with RF and IF Gain Controls
• Analog Tuning Dial with Calibrated Frequency Scale
• External Antenna and Speaker Connections
• Robust Metal Chassis for Long-Term Durability

Basic Usage and Operation Tips

To operate the HQ-170, first connect a suitable antenna to the antenna terminal. Power on the receiver and select the desired frequency band using the band switch. Use the tuning dial to locate the station or signal of interest. Adjust the RF and IF gain controls to optimize signal clarity and reduce noise. For receiving SSB or CW signals, activate the BFO and fine-tune the beat frequency for clear audio. Regularly calibrate the dial using the provided calibration points to ensure accurate frequency readout.

Troubleshooting and Maintenance

If the receiver exhibits weak or no signal, verify antenna connections and check the power supply. Ensure all knobs and switches move freely and make proper contact. Clean the tuning capacitor and contacts periodically to prevent static and signal loss. If audio distortion occurs, inspect the speaker and audio output circuitry. For persistent issues, consult the detailed service manual for component testing and replacement procedures.

Safety Reminder

Always disconnect the HQ-170 from power before performing any maintenance or repairs. Avoid exposing the receiver to moisture or extreme temperatures. Use caution when handling internal components to prevent electric shock. Follow all safety guidelines outlined in the service manual to ensure safe and effective operation.