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Microprocessor-controlled, waterproof case, thermally stable components for reliable operation.
Physical dimensions of the FC-40 are 9.4" x 7" x 2.1", emphasizing portability.
Requires coaxial RF and data/control cables; powered by transceiver.
Emphasizes rugged, low-loss components and high-Q matching network for reliable performance.
Operates 1.8-54 MHz (end-fed wire) or 7-54 MHz (mobile whip).
Max 100W, 2:1 SWR, 10 sec tune-up, 100 memory channels.
Powered by 13.8V DC from transceiver; 9.4"x7"x2.1" case; 2.6 lbs weight.
Microprocessor-controlled, waterproof case, thermally stable components for reliable operation.
Physical dimensions of the FC-40 are 9.4" x 7" x 2.1", emphasizing portability.
Requires coaxial RF and data/control cables; powered by transceiver.
Emphasizes rugged, low-loss components and high-Q matching network for reliable performance.
Operates 1.8-54 MHz (end-fed wire) or 7-54 MHz (mobile whip).
Max 100W, 2:1 SWR, 10 sec tune-up, 100 memory channels.
Powered by 13.8V DC from transceiver; 9.4"x7"x2.1" case; 2.6 lbs weight.
The Yaesu FC-40 is an automatic-matching 100-memory antenna tuner designed to provide all-amateur-band transmitting capability for the FT-897/857 Series of transceivers. This microprocessor-controlled device is specifically engineered to work with an end-fed random wire or long whip antenna, making it a versatile solution for various amateur radio setups.
The primary function of the FC-40 is to automatically match the impedance of a wide variety of antennas to the transceiver, ensuring efficient power transfer and optimal performance across amateur bands. It achieves this by utilizing a carefully-chosen combination of solid-state switching components and high-speed relays. The tuner is designed to integrate seamlessly with the FT-897/857 Series transceivers, leveraging their built-in control circuitry. This allows the operator to control and monitor the FC-40's automatic operation directly from the transceiver. The FC-40 mounts near the antenna feedpoint, optimizing its effectiveness.
One of the key features is its ability to store matching settings. The FC-40 boasts 100 match-point data memories, which means that once a frequency range has been tuned, the settings are automatically stored for instant recall when that same frequency range is selected again. This significantly speeds up band changes and enhances operational convenience. The matching process typically takes less than ten seconds, and it can achieve a match to within a 2:1 SWR (Standing Wave Ratio) on any amateur band frequency, from 160 meters through 5 meters. The required transmitter power for matching can be as low as 4 Watts and up to 60 Watts, making it suitable for a range of power outputs.
The FC-40 requires minimal setup, needing only two interconnections to the FT-897/857 Transceiver: a coaxial RF cable and a data/control cable. Both of these cables are supplied with the unit. All necessary power for the FC-40 is supplied directly from the transceiver, simplifying the power setup and eliminating the need for an external power source for the tuner itself. After these connections, the user simply connects their antenna and ground leads to the FC-40 for immediate operation.
The FC-40 is designed for ease of use and reliability in various operating environments. Its automatic matching capability means that operators do not need to manually adjust tuning controls, simplifying the process of changing bands or frequencies. The 100 memory channels are a significant convenience, allowing for instant recall of previously tuned settings, which is particularly useful for operators who frequently switch between different bands or operating modes. The compact size of the unit (9.4" x 7" x 2.1" or 236 x 175 x 53 mm) makes it easy to install near the antenna feedpoint without being obtrusive. The fact that it draws power directly from the transceiver eliminates the need for additional power cables or supplies, further streamlining the setup. The quick tune-up time of typically less than ten seconds ensures minimal interruption during operation.
The FC-40 is built with durability and reliability in mind. It utilizes specially-selected, thermally-stable components to ensure consistent performance over time. The unit is housed in a waterproof case, designed to withstand severe environmental conditions. This robust construction makes it suitable for outdoor installation near the antenna feedpoint, where it is exposed to the elements. The use of rugged, low-loss components throughout the FC-40 contributes to its long-term reliability and ensures efficient transfer of power to the antenna radiating element. The high-Q matching network is a testament to its design for efficient power transfer. While specific user-level maintenance instructions are not detailed in the provided material, the emphasis on durable construction and high-quality components suggests a design intended for minimal maintenance and long operational life, even in challenging conditions. The waterproof casing protects internal electronics from moisture and dust, which are common causes of failure in outdoor electronic equipment.
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