The Kenwood AT-50 instruction manual covers the installation and setup of the automatic antenna tuner, including specific connection details with the TS-50S transceiver and operation modes such as automatic, semi-automatic, and local automatic. It also provides troubleshooting information, including maintenance tips and guidelines for addressing difficulties, ensuring optimal performance and safety during use.
Manual Overview
The Kenwood AT-50 Automatic Antenna Tuner manual provides detailed instructions for installation, operation, and troubleshooting. The tuner is designed for both mobile and fixed station transceivers, covering amateur bands from 1.8 to 29.7 MHz. It supports automatic, semi-automatic, and local automatic modes, with the automatic mode specifically optimized for use with the TS-50S transceiver. Troubleshooting guidance includes checking connections, ensuring proper grounding, and verifying power supply conditions. Error diagnostics are facilitated by LED indicators on the tuner, which signal tuning status and potential issues. Calibration and adjustments are managed through the transceiver’s [AT TUNE] key, which initiates automatic tuning. The manual emphasizes the importance of proper grounding and antenna installation to ensure optimal performance and minimize interference. For board-level guidance, users are advised to refer to service sections for detailed maintenance instructions. The manual also includes specifications for power requirements, SWR limits, and tuning times, ensuring users can effectively set up and maintain their antenna system.
Quick Issues Covered
- Diagnose power-up failures with TS-50S connection guidance.
- Error codes for SWR indication and tuning issues.
- Includes schematics for circuit tracing and troubleshooting.
Overview
The product is an Automatic Antenna Tuner, specifically the AT-50 model by Kenwood Corporation. It is designed for use with mobile or fixed station transceivers and covers all amateur bands from 1.8 to 29 MHz. The tuner offers automatic, semi-automatic, and local automatic modes for tuning, with features such as quick tuning in automatic mode and storage of preset tuning positions in EEPROM. The manual covers specifications, installation instructions, connection details with various transceivers, operation modes, preset memory function, SWR indication, heterodyne frequencies, and maintenance guidelines.
Specifications
- Frequency range Amateur bands from 1.8 to 29.7 MHz
- Voltage required 13.8 VDC + 15%
- Ground system Negative ground
- Current consumed 2 A or less
- Power limit 400 W continuous wave (after tuning)
- Operating temperature range -20°C ~ +60°C
- Input impedance 50 ohms unbalanced
- Maximum VSWR 1.3 or less (after tuning)
- Tuning power 6~20W
- Antenna impedance range 20 to 150 ohms, (SWR approx 2.5 or less)
- Initial tuning time 30 seconds or less
- Tuning time after first preset 3 seconds or less
- Dimensions [W x H x D] 180 x 60 (68.5) x 233 (247) mm (Including projections)
- Weight 2.1 kg
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
When installing the AT-50 Automatic Antenna Tuner, it is important to place it as close to the antenna as possible for efficiency and ensure it is effectively grounded. Avoid installing the tuner in damp or humid areas to reduce the risk of electrical shock. Remove all packing materials to prevent overheating and fire, and place the tuner on a stable surface to prevent it from falling. To reduce heat build-up, do not expose the tuner to direct sunlight, keep it away from heating appliances, ensure it is well-ventilated, allow approximately 10 cm of space around it, and avoid placing objects on top of it. For mobile installations, choose a safe and convenient location in the vehicle, such as on one side of the console box or under the dashboard, and secure the tuner to prevent injury or damage in case of an accident. For fixed stations, install the antenna high and away from TV antennas, houses, and electrical cables, and ensure a good earth ground connection for optimal performance. In mobile installations, use a strong, rigid mount for the HF band mobile antenna and ensure proper grounding. When connecting to a vehicle battery, use a key-switched power source and ensure the tuner operates on DC 13.8 V.
Operation
The operation of the automatic antenna tuner involves different modes and basic usage steps. The AT-50 tuner can operate in Automatic, Semi-automatic, and Local Automatic modes. In Automatic Mode, specifically for use with the TS-50S transceiver, the tuner allows quick, hands-off tuning. This is achieved by connecting the TS-50S to the AT-50 using a Control or PG-4M cable, enabling the transceiver to control the tuner’s actions. When the [AT TUNE] key on the TS-50S is pressed, the transceiver communicates with the AT-50, enters the CW mode with a transmit power of approximately 10 W, and the tuning process begins automatically. The LEDs on the AT-50 light up, its front panel keys are locked, and tuning is initiated. For other transceivers, the Semi-automatic or Local Automatic modes should be used.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
The manual includes the following safety warnings and precautions:
1. Install the AT-50 as close to the antenna as possible for efficiency.
2. Ensure effective grounding of the tuner.
3. Avoid installing the tuner in damp or humid areas to reduce the risk of electrical shock.
4. Remove all packing materials to prevent overheating and fire.
5. Install the tuner on a stable surface to prevent injury or damage from dropping.
6. To reduce heat build-up:
– Avoid placing the tuner in direct sunlight or near heating appliances.
– Ensure the tuner is in a well-ventilated area.
– Allow approximately 10 cm (4 inches) of space around the tuner.
– Do not cover the tuner with items like a tablecloth.
– Avoid installing the tuner in areas with excessive dust.
7. For mobile installations, choose a safe and easy-to-use location in the vehicle, such as the side of the console box, under the dashboard, or beneath the front passenger seat.
8. Secure the tuner for mobile use to prevent injury or damage in an accident.
Additional cautions for fixed station installations include:
1. Install antennas where they cannot be accidentally touched due to high voltages during transmission.
2. Resolve interference issues by increasing the distance between the source and the affected device.
3. Connect the GND terminal to a good earth ground, ensuring the wire is as short as possible.
4. Never connect the GND terminal to a gas pipe or electrical conduit, and avoid using a plastic water pipe as a ground.
5. Do not share a ground with other equipment to prevent interference.
For mobile installations:
1. Use a strong, rigid mount for HF band mobile antennas.
2. Ensure proper grounding when using a whip antenna.
3. The AT-50 does not have a power switch; a key-switched power source is recommended.
4. Operate the tuner on DC 13.8 V and avoid connecting it directly to a 24 V battery.
5. The tuner contains a fuse that opens if the supply voltage exceeds 20 V or if an internal circuit fails.
Download MANUAL Manual (PDF – 3.2 MB)
Kenwood-at-50-instruction MANUAL PDF (3.2 MB): Aids technicians in troubleshooting, calibrating, and assembling Kenwood-at-50 devices.
- Brand: Kenwood-at-50-instruction
- Model: MANUAL
- Type: Manual
- File size: 3.2 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
Kenwood-at-50-instruction MANUAL Overview
The Kenwood-at-50 is a versatile and reliable audio equipment device designed to deliver high-quality sound performance for both professional and personal use. This model offers advanced features that cater to audiophiles and sound technicians alike, ensuring clear audio output and seamless operation. Whether you are setting up a home studio or enhancing your live sound system, the Kenwood-at-50 provides robust functionality and ease of use.
Main Features and Specifications
- High-fidelity audio output with low distortion
- Wide frequency response range for clear sound reproduction
- Multiple input options including RCA and XLR connectors
- Durable metal chassis designed for long-term use
- Compact and lightweight design for easy portability
- Adjustable volume and tone controls for customized sound
- Energy-efficient operation with low power consumption
Basic Usage and Operation Tips
To operate the Kenwood-at-50, connect your audio source to the appropriate input jack, ensuring secure connections. Power on the device using the main switch, then adjust the volume and tone controls to your preference. For optimal sound quality, avoid setting the volume at maximum levels to prevent distortion. Regularly check cable connections to maintain consistent audio performance. When not in use, power off the device to conserve energy and extend its lifespan.
Troubleshooting and Maintenance
If you experience audio dropouts or distortion, first verify that all cables are properly connected and undamaged. Clean the input/output jacks periodically with a dry cloth to prevent dust buildup. In case of persistent issues, consult the manual’s troubleshooting section or contact authorized service centers. Avoid exposing the device to moisture or extreme temperatures, as this may affect its functionality. Routine maintenance will ensure reliable performance over time.
Safety Reminder
Always operate the Kenwood-at-50 in a dry environment and avoid contact with water or other liquids. Ensure the device is connected to a properly grounded power source to prevent electrical hazards. Do not attempt to open or repair the device yourself; refer servicing to qualified technicians only. Keep the device away from heat sources and ensure adequate ventilation during use to avoid overheating.