The Hammarlund Model HX-50 Transmitter/Exciter manual covers the setup, operation, and troubleshooting of the device, detailing its capabilities for SSB, AM, and CW transmission across various amateur bands, and providing instructions for connecting to power sources, antennas, and associated equipment. It also addresses measures for minimizing television interference, including the use of filters and proper installation techniques.
Manual Overview
The Hammarlund HX-50 Transmitter/Exciter manual provides detailed guidance for technicians on troubleshooting, calibration, and installation. The HX-50 supports SSB, AM, and CW transmissions across various amateur bands, requiring a 40-80 ohm antenna and a 115-volt AC power source for operation. Troubleshooting involves checking connections and ensuring the power source is within the specified range of 105-125 volts. The manual emphasizes the importance of using appropriate connectors for microphone and antenna connections, such as Amphenol type connectors. Calibration involves adjusting the C.T.O. for accurate frequency readings, with less than 5 Kc/s error. Technicians are advised to ensure adequate ventilation and avoid placing the unit near heat sources. The manual also highlights the importance of minimizing television interference through proper filtering and shielding. Board-level guidance includes using the terminal board for station control and connecting external relays. The manual underscores the need for careful examination upon unpacking and provides specific instructions for rear panel connections, ensuring optimal performance and minimal interference.
Quick Issues Covered
- Diagnose power-up failures with 115V AC power source requirements.
- Calibrate frequency with C.T.O. direct reading for accuracy.
- Use schematics for circuit tracing and troubleshooting T.V.I. issues.
Overview
The Hammarlund Model HX-50 Transmitter/Exciter is designed for amateur radio operations, capable of SSB, AM, and CW transmission across multiple amateur bands. It requires a 40-80 ohm terminated antenna system, a key or microphone, and a 115-volt AC power source for operation. The HX-50 can function as a standalone transmitter or as an exciter for a linear power amplifier. It features a stable quartz crystal sideband filter, built-in antenna relay, automatic break-in CW keying, and a direct reading C.T.O. with high calibration accuracy. The device is engineered to minimize television interference through various design and filtering measures.
Specifications
- SSB, AM, and CW transmission
- 160, 80, 40, 20, 15, and 10 meter amateur bands
- 40-80 ohm terminated antenna system
- 115-volt, 50-60 cycle AC power source
- 50-60 Watts SSB and CW power output
- 12-14 Watts AM power output
- Stable quartz crystal sideband filter
- Built-in antenna change over relay
- Time sequenced, automatic break-in CW keying
- C.T.O. direct reading to 10 Kc/s points
- 90 Watts plate input on SSB and CW
- Six band output
- T.V.I. suppression features
- 105-125 Volts, 50-60 Cycle AC power source
- 250 Watts power consumption
- High impedance communications type microphone
- Standard two-conductor phone jack for key
- Coaxial connector for RF output
- Phono type coaxial connector for receiver antenna
- Eight terminal screw type terminal board for station control
- Maximum permissible contact current: 1 amp., 230 VAC
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
The installation highlights for the Hammarlund Model HX-50 Transmitter/Exciter include the following:
1. Unpacking: After unpacking, inspect the unit for any damage that may have occurred during transit. Report any damage to the carrier immediately. Check all shipping labels and tags for special instructions before discarding them.
2. Location: Install the unit in a location that avoids excessive heat or drafts, such as near radiators or air conditioning vents. Ensure there is adequate space around the unit for air circulation.
3. Power Source: The HX-50 operates on a 105-125 Volts, 50-60 Cycle AC power source with a power consumption of 250 Watts. Verify the power source with the local power company if unsure, as using the wrong power source can cause damage.
4. Rear Panel Connections:
– Microphone Receptacle (J101): Use a high impedance communications type microphone with an Amphenol type 75-MCIF connector.
– Key Jack (J103): A standard two-conductor phone jack for hand key or “bug” operation. Wire the plug so that the key base connects to the sleeve at chassis ground potential.
– RF Output Connector (J105): Connects to the antenna system or linear amplifier using a 50-70 ohm coaxial cable with an Amphenol type 83-1SP (PL-259) connector.
– Receiver Antenna Connector (J104): Connects the antenna system to the receiver through a phono type coaxial connector.
– Station Control Terminal Board (TB101): An eight terminal screw type terminal board for connecting the unit into the station control system. Terminals 6, 7, and 8 are for accessory relay contacts, with a maximum permissible contact current of 1 amp, 230 VAC. Terminals 3 and 4 are for receiver output and speaker connections.
Operation
The Hammarlund Model HX-50 Transmitter/Exciter operates in SSB, AM, and CW modes across the 160, 80, 40, 20, 15, and 10 meter amateur bands. It can function as a standalone transmitter or as an exciter for a linear power amplifier. For operation, it requires a 40-80 ohm terminated antenna system, a key or microphone, and a 115-volt, 50-60 cycle AC power source. The HX-50 features a stable quartz crystal sideband filter, built-in antenna change-over relay, and automatic break-in CW keying. It provides power outputs of 50-60 Watts for SSB and CW, and 12-14 Watts for AM. The device is designed to minimize television interference through adequate filtering and a three-element variable pi-network for harmonic suppression.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 1.6 MB)
Hammarlund HX-50 Manual: Troubleshoot, repair, and calibrate the HX-50 model with detailed instructions. PDF size: 1.6 MB.
- Brand: Hammarlund-hx-50-instruction-and-service
- Model: MANUAL
- Type: Service 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
- 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 MANUAL service manual (PDF)
Hammarlund HX-50 Instruction and Service Manual Overview
The Hammarlund HX-50 is a classic communications receiver designed for amateur radio enthusiasts and professional users alike. Renowned for its robust construction and reliable performance, the HX-50 covers a wide frequency range, allowing users to tune into shortwave broadcasts, amateur bands, and other radio signals with clarity. This manual provides detailed instructions for operation, maintenance, and servicing to ensure optimal performance of the receiver.
Main Features and Specifications
- Frequency Coverage: 540 kHz to 30 MHz continuous tuning
- Superheterodyne receiver design with multiple IF stages for enhanced selectivity
- AM, CW, and SSB reception modes
- Integrated BFO (Beat Frequency Oscillator) for CW and SSB demodulation
- Calibrated tuning dial with band spread control for precise frequency selection
- Built-in noise limiter and RF gain control
- External antenna and speaker connections
- Robust metal chassis for durability and shielding
Basic Usage and Operation Tips
To operate the HX-50, start by connecting a suitable antenna and powering on the receiver. Use the main tuning dial to select the desired frequency band, then fine-tune using the band spread control for accurate reception. Adjust the RF gain and volume controls to optimize signal clarity. For CW and SSB signals, activate the BFO to properly demodulate the transmission. Regularly monitor the signal strength meter to ensure optimal reception conditions.
Troubleshooting and Maintenance Notes
Common issues include weak or distorted audio, which can often be resolved by checking antenna connections and ensuring proper alignment of the tuning components. Periodic cleaning of the tuning dial and internal contacts is recommended to maintain smooth operation. If the receiver fails to power on, verify the power supply and fuse condition. Refer to the service sections in the manual for detailed alignment procedures and component replacement guidelines.
Safety Reminder
Always disconnect the receiver from power before performing any maintenance or repairs. Avoid exposing the equipment to moisture or extreme temperatures. Use caution when handling internal components to prevent electric shock or damage to sensitive parts. Following the safety instructions in the manual will help ensure safe and reliable operation of your Hammarlund HX-50 receiver.
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)