Icom IC-765 Instruction Manual

Pages 60

Year 1990

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of 60

Icom IC-765 Transceiver Specification

The Icom IC-765 Transceiver is a sophisticated HF radio device designed for amateur radio enthusiasts, offering advanced features for enhanced communication capabilities. It operates across a frequency range of 160 to 10 meters, providing comprehensive band coverage. The IC-765 is equipped with a general coverage receiver that spans from 100 kHz to 30 MHz, facilitating broad-spectrum listening. It boasts a robust 100-watt output power, ensuring strong signal transmission across various frequencies. The transceiver incorporates a triple conversion superheterodyne receiver architecture with a high first intermediate frequency, enhancing signal clarity and selectivity.

The IC-765 features advanced filtering options, including a built-in automatic notch filter and passband tuning, allowing users to manage and eliminate unwanted noise effectively. Its digital signal processing capabilities further enhance audio quality by reducing interference and improving clarity. The transceiver is equipped with a large, easy-to-read LCD display, providing critical information and status updates at a glance. The intuitive user interface, complemented by a comprehensive array of control knobs and buttons, facilitates seamless operation and quick adjustments.

For connectivity, the IC-765 includes multiple input and output options, ensuring compatibility with external devices and accessories. It supports various operating modes such as SSB, CW, RTTY, and AM, catering to diverse communication needs. The inclusion of a built-in automatic antenna tuner aids in optimizing transmission efficiency by matching the transceiver to the connected antenna system. Constructed with durability in mind, the IC-765 features a sturdy chassis and high-quality components, promising reliable performance over extended periods of use. This transceiver is designed to meet the demands of serious amateur radio operators, offering a blend of versatility, performance, and user-friendly operation.

Icom IC-765 Transceiver F.A.Q.

How can I perform a factory reset on the Icom IC-765 Transceiver?

To reset the Icom IC-765 to factory settings, turn off the transceiver. Then, while holding down the [CLEAR] button, turn the power back on. This will reset the settings to their default values.

What should I do if the receive audio is distorted?

Check the AF gain and RF gain settings to ensure they're appropriately adjusted. Also, verify that the AGC (Automatic Gain Control) is set correctly. If distortion persists, check the speaker connections or try using an external speaker.

How do I adjust the transmit power on the IC-765?

Use the RF POWER control knob on the front panel to adjust the transmit power. Turn the knob clockwise to increase and counterclockwise to decrease the power output.

What is the proper procedure for cleaning the IC-765?

Use a soft, dry cloth to clean the exterior of the transceiver. Avoid using harsh chemicals or solvents. For the display and control knobs, a slightly damp cloth can be used, but ensure no moisture enters the device.

How can I improve the selectivity of my IC-765?

To enhance selectivity, consider installing optional narrow filters if they are not already installed. Additionally, using the passband tuning (PBT) can help minimize interference from adjacent signals.

Why is there no output power during transmission?

Ensure that the microphone is properly connected and functional. Check the PTT (Push To Talk) switch operation. Verify that the transceiver is not in the CW mode if you're using a microphone for voice transmission.

How do I update the firmware on the IC-765?

The IC-765 does not support firmware updates as it is an older model. All settings and functionalities are hardware-based.

Can I connect an external antenna tuner to the IC-765?

Yes, you can connect an external antenna tuner to the IC-765. Use the ACC socket or connect it directly to the antenna output, following the tuner manufacturer's instructions for optimal performance.

What steps should I take if the frequency display is inaccurate?

Check the VFO lock and ensure it's not engaged inadvertently. If the problem persists, the internal frequency counter may need calibration. Refer to the service manual for calibration procedures or consult a professional technician.

How can I enhance the audio output quality of my IC-765?

Use high-quality external speakers or headphones to improve audio output. Additionally, adjust the audio equalizer settings if available, and ensure the transceiver is not overdriven by excessive AF gain.