Icom AT-140 Instruction Manual

Icom AT-140 Tuner manual cover
Pages 16
Year 2021
Language(s)
English en

Icom AT-140 Tuner Specification

The Icom AT-140 Tuner is a robust and advanced automatic antenna tuner designed to enhance HF marine radio communications. It operates seamlessly with Icom's compatible transceivers, providing efficient and reliable tuning across a wide frequency range from 1.6 to 30 MHz. The AT-140 is engineered to automatically match a variety of antennas, including long wires and whip antennas, ensuring optimal performance and signal clarity.

This tuner is encased in a weather-resistant, rugged exterior, making it suitable for harsh marine environments. It automatically tunes with a power range from 8 to 150 watts, offering versatility for different transmission needs. The AT-140 features a sophisticated microprocessor-controlled tuning system that quickly and precisely adjusts the antenna, typically achieving a match in less than three seconds for previously stored frequencies, and less than fifteen seconds for new frequencies.

The device operates with a 13.8 V DC power supply, drawing minimal current in idle mode, which is ideal for conserving energy on marine vessels. It integrates seamlessly with Icom transceivers via a control cable, facilitating simple installation and operation. The tuner also features a self-diagnostic function that alerts users to any operational issues, enhancing reliability and ease of maintenance.

Overall, the Icom AT-140 is a dependable solution for maintaining clear and consistent HF radio communications in marine environments, thanks to its automatic tuning capabilities, durable design, and user-friendly operation.

Icom AT-140 Tuner F.A.Q.

How do I properly connect the Icom AT-140 tuner to my radio and antenna?

To connect the Icom AT-140 tuner, attach the coaxial cable from the transmitter to the transceiver connector on the tuner. Then, connect another coaxial cable from the antenna connector on the tuner to your antenna. Ensure all connections are tight and secure to prevent signal loss.

What should I do if the tuner fails to match the antenna?

First, ensure that all connections are secure and that the antenna is properly grounded. Check for any damage to the coaxial cables. If the problem persists, try resetting the tuner by turning off the power and disconnecting it for a few minutes before reconnecting and powering on.

How can I perform a factory reset on the Icom AT-140 tuner?

To perform a factory reset, disconnect the power supply and all cables. Wait for about 10 seconds and then reconnect everything. This will reset the internal microprocessor to its default settings.

What is the recommended maintenance routine for the Icom AT-140 tuner?

Regularly inspect the coaxial connections for signs of wear or corrosion. Clean the connectors with a dry cloth and ensure they are tightly secured. Periodically check the antenna system and grounding to ensure optimal performance.

Can the Icom AT-140 be used with non-Icom radios?

Yes, the Icom AT-140 can be used with non-Icom radios, but you may need an appropriate interface cable to connect it properly. Consult the radio's and the tuner's manuals for compatibility and connection instructions.

What are the symptoms of a faulty Icom AT-140 tuner?

Symptoms of a faulty tuner include inability to achieve a low SWR, frequent tuning failures, and inconsistent performance. If these issues arise, inspect the connections and cables, and consider seeking professional repair if necessary.

How can I improve the tuning speed of the Icom AT-140?

Tuning speed can be improved by ensuring that the antenna system is well-matched to the frequency band in use. Additionally, ensure the tuner is properly grounded and that all connections are secure.

What power limits should I observe when using the Icom AT-140?

The Icom AT-140 is designed to handle a maximum power input of 120 watts PEP for HF and 100 watts PEP for 6 meters. Operating within these limits ensures optimal performance and prevents damage to the tuner.

Is there any software required to operate the Icom AT-140 tuner?

No additional software is required to operate the Icom AT-140 tuner. It functions automatically by sensing the transmitted frequency and adjusting the tuning elements accordingly.

How can I verify if the Icom AT-140 is tuning correctly?

Check the SWR meter on your radio; a successful tune should result in a low SWR reading, ideally below 2:1. Additionally, listen for a decrease in noise and clearer signal reception, which indicates proper tuning.