The manual for the Hammarlund HQ-110A VHF and HQ-170A VHF receivers provides instructions for setting up and operating the receivers to tune amateur frequencies from 160 meters to 2 meters, including the use of a 6CW4 pre-amplifier to improve sensitivity on the 6-meter band. It also includes troubleshooting steps such as alignment procedures using a signal generator and alignment tools to ensure optimal performance.

• Brand: Hammarlund
• Model: ADDENDA
• Type: manual
• File size: 1.6 MB

Manual Overview

The Hammarlund HQ-110A VHF and HQ-170A VHF receivers are designed to handle amateur frequencies from 160 meters to 2 meters, supporting CW, AM, and SSB signals. For 6-meter reception (50 to 54 MHz), users should set the bandswitch accordingly and push the volume control knob in. The receivers feature a low-noise 6CW4 pre-amplifier stage for enhanced sensitivity on the 6-meter band. For 2-meter signals (144 to 148 MHz), the volume control knob should be pulled out to activate frequency converter stages. Separate antennas are recommended for 6 and 2-meter operations, though a switching unit can be used for a combination antenna.

The field alignment procedure requires a signal generator and alignment tools. Users should adjust various coils and capacitors, such as L205, L206, L207, and C202, to achieve peak readings. The manual provides detailed steps for tuning and calibration, ensuring optimal performance. The converter circuit utilizes four 6CW4 Nuvister tubes, with signals introduced through a tapped antenna coil and processed through RF amplifiers and bandpass filters. The parts list includes detailed specifications for components like capacitors, coils, resistors, and tubes, aiding in troubleshooting and repairs.

Quick Issues Covered

• Diagnose power-up failures with volume control knob position.
• Calibrate 6-meter pre-amplifier using L205 and L206 adjustments.
• Trace circuit issues using detailed schematics for HQ-110A and HQ-170A.

Overview

The Hammarlund HQ-110A VHF and HQ-170A VHF are receivers designed to tune all amateur frequencies from 160 meters through 2 meters, capable of receiving CW, AM, and SSB signals. The manual provides instructions for receiving 6-meter signals, improving sensitivity on the 6-meter band with a low noise 6CW4 pre-amplifier stage, and converting 144 to 148 mc signals to 50 to 54 mc signals. It also includes a field alignment procedure with required equipment and steps for tuning and adjusting the receiver.

Specifications

• HQ-110A-VHF and HQ-170A-VHF receivers
• Tuning range: 160 meters through 2 meters
• Reception modes: CW, AM, SSB
• 6CW4 pre-amplifier stage
• Converter: 4 type 6CW4 Nuvister tubes
• Frequency conversion: 144 to 148 mc to 50 to 54 mc signals
• Separate antennas recommended for 6 and 2 meter operation

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

The installation/setup highlights for the Hammarlund HQ-110A VHF and HQ-170A VHF receivers include the following:

– To receive 6 meter signals, the bandswitch should be set to the 50 to 54 mc position and the volume control knob should be pushed in. A suitable antenna must be connected to the proper antenna terminal.
– For 2 meter signals, when the bandswitch is in the 50 to 54 mc position and the volume control knob is pulled out, frequency converter stages are activated to change 144 to 148 mc signals to 50 to 54 mc signals.
– Separate antennas are recommended for 6 and 2 meter operation. If a combination 6/2 meter antenna is used, a switching unit should be employed to disconnect the antenna terminal not in use.
– Field alignment requires a signal generator and alignment tools. The cover must be in place during tuning.
– The alignment procedure involves tuning various coils and components to peak the receiver’s performance at specific frequencies.

These points cover wiring, clearances, calibration, and prerequisites as described in the source.

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. The sensitivity on the 6 meter band is improved by a low noise 6CW4 pre-amplifier stage. 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. It is recommended to push in the volume control knob when not receiving 2 meter signals to reduce power consumption. Separate antennas are recommended for 6 and 2 meter operation, or use a switching unit for a combination 6/2 meter antenna. On six and two meters, the sideband switch is reversed due to the high frequency oscillator, 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 ADDENDA Manual (PDF – 1.6 MB)

Hammarlund HQ-170A Addenda Manual: Provides detailed instructions for troubleshooting and calibrating the HQ-170A receiver.

• Brand: Hammarlund-hq-170a-instruction-manual
• Model: ADDENDA
• Type: Manual
• File size: 1.6 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 ADDENDA manual (PDF)

The manual for the Hammarlund HQ-110A VHF and HQ-170A VHF covers the setup and operation of the receivers, including tuning for amateur frequencies from 160 meters to 2 meters and improving sensitivity on the 6-meter band with a low noise pre-amplifier. It also provides troubleshooting instructions, such as field alignment procedures using a signal generator and alignment tools, and details on adjusting various components for optimal performance.

• Brand: Hammarlund
• Model: ADDENDA
• Type: manual
• File size: 1.6 MB

Manual Overview

The Hammarlund HQ-110A VHF and HQ-170A VHF receivers are designed to operate across amateur frequencies from 160 meters to 2 meters, supporting CW, AM, and SSB signals. For 6-meter signals, the bandswitch should be set to the 50-54 MHz position, and the volume control knob pushed in. The receivers feature improved sensitivity on the 6-meter band due to a low-noise 6CW4 pre-amplifier stage. When the bandswitch is set for 2-meter signals, the volume control knob should be pulled out to activate frequency converter stages that convert 144-148 MHz signals to 50-54 MHz. Calibration involves using a signal generator and alignment tools, with specific procedures for tuning coils and capacitors to peak performance. Troubleshooting includes ensuring proper antenna connections and using separate antennas for 6 and 2-meter operations, with a switching unit recommended for combined antennas. The manual provides detailed board-level guidance, including parts lists and schematic diagrams for precise maintenance and adjustments.

Quick Issues Covered

• Diagnose power-up failures with volume control knob position.
• Calibrate 6-meter band using L205 and L206 adjustments.
• Trace circuit faults using detailed schematics for HQ-110A VHF.

Overview

The Hammarlund HQ-110A VHF and HQ-170A VHF receivers are designed to tune all amateur frequencies from 160 meters through 2 meters, providing reception of CW, AM, and SSB signals. The manual covers the operation of receiving 6 meter signals, improvements in sensitivity on the 6 meter band due to a low noise pre-amplifier, and the use of frequency converter stages for 2 meter signals. It also includes a field alignment procedure with required equipment and step-by-step instructions for tuning and adjusting the receiver.

Specifications

• HQ-110A-VHF and HQ-170A-VHF receivers
• Tuning: 160 meters through 2 meters
• Reception: CW, AM, SSB signals
• 6CW4 pre-amplifier stage
• Frequency converter stages
• 4 type 6CW4 Nuvister tubes
• Tapped antenna coil
• 6CW4 RF amplifier
• Bandpass filter components: L202, C204, C206, L203, L204

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

The source provides detailed instructions for the field alignment procedure of the Hammarlund HQ-110A VHF and HQ-170A VHF receivers. It outlines the equipment required, such as a signal generator and alignment tools, and gives step-by-step instructions for tuning and peaking various coils and components to ensure optimal performance. The procedure includes adjusting slugs, tuning the receiver to specific frequencies, and using a signal generator to achieve peak readings. Additionally, it mentions the need to unsolder and resolder a B+ lead during the process. Separate antennas are recommended for 6 and 2-meter operations, with a switching unit suggested for combined antenna use.

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. The sensitivity on the 6 meter band is improved by using a low noise 6CW4 pre-amplifier stage. For receiving 2 meter signals (144 to 148 mc), pull out the volume control knob, which turns on frequency converter stages that change 144 to 148 mc signals to 50 to 54 mc signals. It is recommended to push in the volume control knob when not receiving 2 meter signals 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. On six and two meters, the sideband switch is reversed due to the high frequency oscillator being used on the low side of the incoming signal, 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 ADDENDA Manual (PDF – 1.6 MB)

Hammarlund HQ-110A Addenda Manual PDF helps technicians troubleshoot and calibrate the HQ-110A receiver. File size: 1.6 MB.

• Brand: Hammarlund-hq-110a-instruction-manual
• Model: ADDENDA
• Type: Manual
• File size: 1.6 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 ADDENDA manual (PDF)