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CONNECTING THE POWER CORDS

We recommend connecting the power lead to the Ignition Switch Accessory Terminal. This way, the transceiver is automatically turned off when the ignition switch is turned off.

Or, the power cord may be connected to an available terminal on the fuse block, or, to a point in the wiring harness. However, caution must be taken to prevent a short circuit. If in doubt, contact your vehicle dealer for information.

This transceiver may be installed and used in any 12-volt DC negative or positive ground system vehicle.

GROUND INFORMATION

Most newer U.S. and foreign made cars, and small trucks, use a negative ground system. Some older cars, and some new large trucks, use a positive ground system.

With a negative ground system, the negative (-) battery terminal is usually connected to the vehicle motor block. If you cannot determine the polarity system of your vehicle, contact your vehicle dealer for information.

Negative Ground System

If you have a negative ground system, connect the red DC power cord from the transceiver to the positive (+) battery terminal or other convenient point. Then connect the black power cord to the vehicle chassis or negative (-) battery terminal.

Positive Ground System

If you have a positive ground system,connect the black DC power cord from the transceiver to the negative (-) battery terminal or other convenient point. Then, connect the red power cord to the vehicle chassis or the positive (+) battery terminal.

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Uniden PC78 manual Connecting the Power Cords

PC78 specifications

The Uniden PC78 is a robust and versatile CB radio that has earned a reputation among enthusiasts for its reliability and performance. As a part of Uniden’s long-standing tradition of quality communication devices, the PC78 is designed for both casual users and serious CB radio operators.

One of the standout features of the Uniden PC78 is its sleek design coupled with a user-friendly control interface. The radio comes with an easy-to-read LCD display that illuminates for visibility in low-light conditions. This feature is essential for nighttime operations, allowing users to easily see channel numbers and other vital information without straining their eyes.

The PC78 operates on the 40-channel Citizens Band frequency, providing ample options for communication. It also includes an automatic noise limiter, which helps to reduce background noise and ensure clearer audio quality during transmissions. This technology is especially useful in areas with significant electronic interference, helping users maintain a clear connection.

Another key characteristic of the Uniden PC78 is its power output. The radio operates at 4 watts of maximum power, which is standard for most CB radios, ensuring that users can communicate effectively over reasonable distances. Additionally, the radio is equipped with a built-in SWR (Standing Wave Ratio) meter, which allows users to tune their antennas for optimal performance, ensuring maximum signal strength and clarity.

The PC78 also supports an array of advanced features, including automatic squelch control, which automatically mutes the speaker when no signals are present, preventing unwanted noise. The dynamic squelch control further enhances this feature, adapting to varying signal levels.

Furthermore, the Uniden PC78 includes a dual watch function that allows users to monitor two channels simultaneously, facilitating communication flexibility. Users can easily switch between their primary channel and a secondary one, making it easier to stay updated on different conversations.

In terms of durability, the Uniden PC78 is built to withstand the rigors of daily use, making it suitable for both in-vehicle and base station setups. Its sturdy construction ensures long-lasting performance, making it a reliable choice for both everyday use and rugged environments.

In conclusion, the Uniden PC78 is a feature-rich CB radio that combines advanced technology with user-friendly operation. Its clarity, durability, and range of functionalities make it an excellent choice for anyone looking to enhance their communication capabilities in the CB radio realm. Whether for work or leisure, the PC78 stands out as a dependable option in the competitive market of CB radios.