The Hammarlund HXL-ONE Linear Amplifier manual provides detailed instructions for setup, operation, and troubleshooting, including guidance on unpacking, installation, and connection to an exciter unit. It emphasizes safety precautions due to the high voltage involved and specifies the need for proper grounding and correct tube installation for optimal performance.
Manual Overview
The Hammarlund HXL-ONE Linear Amplifier manual provides detailed guidance on troubleshooting, error diagnostics, and operational adjustments. The amplifier is designed for compatibility with the Hammarlund HX-50 Transmitter but can be used with other transmitters of similar power ratings. It employs a pair of 572A/B vacuum tubes, with the 572B being an improved version, offering easier drive in grounded grid service. The manual emphasizes safety precautions due to the high voltage of approximately 2000 volts, advising that the unit should not be powered unless properly grounded and enclosed. For troubleshooting, the manual suggests checking connections and ensuring the correct installation of tubes, which must be of the same type for optimal performance. Calibration involves adjusting the filament and plate power transformer primaries as per the schematic, especially when switching between 110/120 and 220/250 volt operations. The manual also provides board-level guidance for connecting the amplifier to the exciter and antenna, with specific instructions for different transmitter models. Proper grounding and fuse installation are critical for safe operation.
Quick Issues Covered
- Diagnose power-up failures with high voltage supply issues.
- Calibrate tube bias for optimal performance using metering arrangements.
- Use schematics for circuit tracing and transformer wiring adjustments.
Overview
The Hammarlund HXL-ONE Linear Amplifier is a high-performance, ruggedly built amplifier designed to complement the Hammarlund HX-50 Transmitter. It can also be used with other transmitters or transceivers of similar power ratings. The amplifier is of the “grounded grid” type and uses a pair of 572A/B United Electronics Zero Bias Carbon Plate Triodes. It includes its own high voltage supply, standby bias, control circuitry, and metering arrangements. The control circuitry allows the exciter unit to drive the antenna directly when the amplifier is switched off, and provides boosted power when switched on. The HXL-ONE is designed for operation from standard 110/120 volt or 220/240 volt AC supplies.
Specifications
- “`
- Linear Amplifier
- Grounded Grid Type
- Pair of Type 572A/B United Electronics Zero Bias Carbon Plate Triodes
- Plate Dissipation Rating: Approximately Three 811's
- High Voltage Supply
- Standby Bias
- Control Circuitry
- Metering Arrangements
- Frequency Range: 10, 15, 20, 40, and 75/80 Meter Amateur Bands
- Voltage: 6.3 Volts
- Current: 4.0 Amperes
- Plate Power: 1 KW DC for CW Operation
- Amplification Factor: 572A 170, 572B 200
- Power Gain: 10 dB
- Input Impedance: 50 ohms nominal
- RF Output Impedance: 50 ohms
- Standby Power Requirements: 100 watts, 110/120 or 220/250 volts, 50/60 cycles, AC
- DC Plate Voltage: 2100 to 2700 volts
- DC Plate Current: 200-310 mA
- DC Grid Current: 30-45 mA
- DC Plate Input: 425-575 watts
- Plate Dissipation: 140-190 watts
- Grid Dissipation: 18-20 watts
- Tubes: 2 572A/B Vacuum Tubes
- Diodes: 2 LND4A Diodes, 1 CERCA Diode
- Dimensions: 14" wide, 8-1/2" deep, 9-1/2" high
- Weight: 60 lbs
- “`
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
The HXL-ONE Linear Amplifier requires specific setup procedures. It is initially wired for a 110/120 volt standard receptacle but can be adjusted for 220/250 volt operation by removing the unit from the case and connecting the filament and plate power transformer primaries as indicated in the schematic. The fan motor should remain wired for a 115 volt source. For 220/250 volt operation, the power plug needs to be changed to the appropriate type, and the third lead should be grounded to the chassis before applying power. Proper fuses must be installed when changing voltage settings.
The amplifier should be placed close to the exciter unit, with the antenna cable connected to the RF output of the amplifier. Tubes must be installed by removing the enclosure, grounding the plate caps to discharge high voltage capacitors, and inserting the tubes into their sockets. Identical tube types must be used for proper operation. After installation, the cabinet should be reassembled before powering the unit. The power source must supply 15 amperes for 110/120 volt operation or 7.5 amperes for 220/250 volt operation.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
The high voltage of the HXL-ONE Amplifier is approximately 2000 volts. Therefore, extreme caution should be exercised at all times. The unit should not be powered unless its cabinet is firmly installed and the chassis of the amplifier is connected to a good ground. Before touching any high voltage circuitry, it is suggested that the plate caps for the tubes be grounded with a screwdriver that has a well-insulated handle to ensure that the high voltage filter capacitors are not holding a charge.
Download MANUAL Manual (PDF – 5.4 MB)
Hammarlund HXL-One Manual: Provides instructions for troubleshooting and calibrating the HXL-One model. File size: 5.4 MB.
- Brand: Hammarlund-hxl-one-instruction
- Model: MANUAL
- Type: Manual
- File size: 5.4 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
Hammarlund HXL One Instruction Manual Overview
The Hammarlund HXL One is a high-performance communications receiver designed for amateur radio enthusiasts and professionals alike. Renowned for its exceptional sensitivity and selectivity, this device allows users to tune into a wide range of frequencies with clarity and precision. Whether you are monitoring shortwave broadcasts, amateur radio transmissions, or other communications signals, the Hammarlund HXL One provides reliable performance and ease of use.
Main Features and Specifications
- Frequency Coverage: 540 kHz to 30 MHz
- Multiple Band Selection for versatile operation
- High Sensitivity and Selectivity for clear signal reception
- Built-in Noise Limiter and Automatic Gain Control (AGC)
- Analog tuning dial with fine adjustment capabilities
- External antenna input for enhanced signal capture
- Compact and durable design suitable for field or home use
Basic Usage and Operation Tips
To operate the Hammarlund HXL One, first connect a suitable antenna to the external input. Power on the receiver and select the desired frequency band using the band selector switch. Use the main tuning dial to locate the desired frequency, adjusting the fine tuning knob for optimal clarity. Engage the noise limiter and AGC controls as needed to improve signal quality. Regularly monitor signal strength and adjust volume accordingly for comfortable listening.
Troubleshooting and Maintenance Notes
If you experience weak or distorted signals, verify antenna connections and ensure the device is properly grounded. Clean the tuning dial and control knobs periodically to prevent dust buildup, which can affect performance. For persistent issues, consult the manual’s troubleshooting section to check internal components and calibration. Avoid exposing the receiver to moisture or extreme temperatures to maintain longevity.
Safety Reminder
Always operate the Hammarlund HXL One in a dry environment and avoid contact with electrical components while the device is powered. Use only the recommended power supply and ensure all connections are secure to prevent electrical hazards. Follow all safety instructions outlined in the manual to ensure safe and effective operation.
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