Icom IC-738 Instruction Manual

Pages 68

Year 1994

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of 68

Icom IC-738 Transceiver Specification

The Icom IC-738 is a high-frequency transceiver designed for amateur radio enthusiasts, offering robust performance and advanced features suited for both casual operators and experienced communicators. It operates across all HF amateur bands from 160 to 10 meters, ensuring comprehensive frequency coverage for diverse communication needs. The IC-738 delivers a reliable output power of 100 watts, providing sufficient power for long-distance communication. It features a general coverage receiver with a frequency range from 0.1 to 30 MHz, allowing users to listen to a wide array of broadcasts beyond the amateur bands.

The transceiver incorporates a sophisticated digital signal processing system that enhances audio quality and signal clarity, enabling improved communication even in challenging conditions. The IC-738 is equipped with a dual VFO, facilitating seamless frequency transition and split operation, which is beneficial for DXing and contesting. Its built-in automatic antenna tuner ensures optimal impedance matching, improving transmission efficiency and reducing signal loss.

The front panel is designed for intuitive operation, featuring a large, easy-to-read LCD display that provides critical information such as frequency, mode, and signal strength. The interface is complemented by a variety of controls, including a multi-function dial for smooth tuning and quick access to essential functions. The IC-738 supports multiple operating modes, including SSB, CW, AM, and FM, offering versatility for different communication preferences.

Additionally, the transceiver includes features like noise blanking, IF shift, and a notch filter to mitigate interference and enhance reception quality. With its combination of performance, features, and user-friendly design, the Icom IC-738 remains a reliable choice for amateur radio operators seeking a capable HF transceiver.

Icom IC-738 Transceiver F.A.Q.

How do I perform a factory reset on the Icom IC-738 transceiver?

To perform a factory reset on the Icom IC-738, turn off the transceiver. Then, while holding down the [SET] and [LOCK] buttons, turn the transceiver back on. This will reset all settings to factory defaults.

What is the best way to reduce RF interference on the IC-738?

To reduce RF interference on the IC-738, ensure all connections are secure and properly grounded. Use high-quality coaxial cables and consider using a high-pass filter if interference persists. Adjusting the RF gain and using the noise blanker function can also help.

How can I improve the audio quality of my IC-738 transmissions?

Improve audio quality by adjusting the microphone gain and compression settings. Use a high-quality microphone and ensure that the modulation level is optimal. Regularly check and clean the microphone and connector contacts.

Why does my IC-738 keep losing memory settings when powered off?

If the IC-738 loses memory settings, the internal backup battery may need replacement. Refer to the manual for instructions on replacing the battery, or contact a professional service technician.

How do I program frequencies into the memory channels of the IC-738?

To program frequencies, select the desired frequency and mode. Press and hold the [MW] button, then select the memory channel using the tuning dial. Release the [MW] button to store the frequency in the selected channel.

What steps should I follow for regular maintenance of my IC-738?

Regular maintenance includes cleaning the exterior with a soft, dry cloth, checking all connections for corrosion, and ensuring the antenna is properly tuned. Periodically test all functions and consult the manual for any specific maintenance procedures.

How can I update the firmware on my IC-738?

The IC-738 does not support firmware updates as it is an older model. Ensure you have the latest operating manuals and supplementary materials provided by Icom for optimal operation.

What can I do if the display on my IC-738 is not functioning properly?

If the display is not functioning, check the power supply and connections first. If the issue persists, the display module or related components may need servicing. Consult a professional technician for repairs.

How do I adjust the RF power output on my IC-738?

To adjust the RF power output, press the [PWR] button and turn the main dial to set the desired power level. Ensure the power output level is appropriate for your antenna and operating conditions.

What should I do if my IC-738 is overheating during operation?

If the IC-738 overheats, ensure it is placed in a well-ventilated area. Check for obstructions around cooling vents and verify that the fan is working correctly. Reduce the transmission power if necessary, and avoid prolonged transmission periods.