Icom IC-725 Instruction Manual

Pages 39

Year 1988

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of 39

Icom IC-725 Transceiver Specification

The Icom IC-725 Transceiver is a versatile HF amateur radio transceiver, designed for reliable communication across various frequency bands. It covers the HF spectrum from 1.8 to 30 MHz, ensuring compatibility with major amateur radio bands. The transceiver features a general coverage receiver, allowing it to receive signals from 0.1 to 30 MHz, enhancing its utility for amateur radio operators interested in a broad range of frequencies.

The IC-725 is engineered with a robust 100 watts of output power, providing ample signal strength for effective communication. It includes a compact but comprehensive set of controls and a straightforward user interface, making it accessible for both novice and experienced operators. The transceiver is equipped with dual VFOs (Variable Frequency Oscillators), which facilitate easy frequency management and quick switching between bands.

An essential aspect of the IC-725 is its high-quality receiver with excellent sensitivity and selectivity, which ensures clear signal reception even in crowded band conditions. The inclusion of a preamplifier and attenuator allows users to optimize reception under varying conditions. The IC-725 also supports modes such as SSB, CW, and AM, catering to a wide range of communication preferences.

The transceiver is built with durability in mind, featuring a robust chassis that withstands the rigors of field and base station use. Its compact design makes it suitable for mobile and portable operations without compromising performance. The IC-725 is powered by a 13.8V DC supply, common in amateur radio setups, ensuring compatibility with existing power systems. Overall, the Icom IC-725 Transceiver offers a balanced combination of performance, reliability, and ease of use, making it a valuable asset for amateur radio enthusiasts worldwide.

Icom IC-725 Transceiver F.A.Q.

How can I perform a factory reset on the Icom IC-725?

To perform a factory reset on the Icom IC-725, turn off the transceiver. Press and hold the 'FUNC' key while turning the power back on. This will reset the transceiver to its default factory settings.

What is the best way to connect an external antenna to the IC-725?

Connect an external antenna to the IC-725 using a 50-ohm coaxial cable. Ensure the PL-259 connector is securely attached to the transceiver's ANT connector. Use an appropriate antenna tuner for optimal performance.

How can I troubleshoot receive audio issues on the IC-725?

Check the volume and squelch settings to ensure they are appropriately adjusted. Inspect the speaker or headphones for any faults. If the issue persists, verify that the antenna is properly connected and in good condition.

What regular maintenance is recommended for the Icom IC-725?

Regular maintenance includes cleaning the exterior with a soft, dry cloth, checking all connections, and ensuring the antenna system is in good condition. Periodically inspect and clean the cooling fan and vents to prevent overheating.

How do I properly ground the IC-725 transceiver?

To properly ground the IC-725, use a heavy gauge wire to connect the transceiver's ground terminal to a common ground point, such as a ground rod or a cold water pipe, to prevent electrical interference and improve safety.

Can I use a linear amplifier with the IC-725?

Yes, you can use a linear amplifier with the IC-725. Ensure that the amplifier's input does not exceed the transceiver's output capability and that all connections are secure to prevent damage.

What should I do if the IC-725 does not power on?

Check the power supply to ensure it is providing the correct voltage and current. Inspect the power cable for any damage and ensure it is securely connected. If the issue persists, check the internal fuses.

How can I improve the transmit audio quality on my IC-725?

Ensure the microphone gain is set correctly and that you are using a compatible microphone. Consider adjusting the transceiver's equalizer settings for optimal audio quality.

What is the procedure to update the firmware of the IC-725?

The IC-725 does not support firmware updates as it is an older model. Ensure all settings and components are working correctly for optimal performance.

How can I set memory channels on the IC-725?

To set memory channels, tune to the desired frequency, press 'MEMO', select an empty channel, and then press 'MEMO' again to store the frequency in memory.