President Johnson II USA CB Radio 12/24V User Manual

Introduction

The President Johnson II USA is a versatile AM Transceiver CB Radio designed for reliable communication in 12V or 24V vehicle electrical systems. This manual provides comprehensive instructions for the installation, operation, and maintenance of your CB radio, ensuring optimal performance and longevity.

Package Contents

Upon unpacking, please verify that all the following items are included:

• President Johnson II USA CB Radio Unit
• Microphone with coiled cord
• 12/24V Power Supply Cable
• Mounting Bracket and Hardware
• User Manual (this document)

Figure 1: Product Packaging. The box indicates a 2-3 year warranty and highlights key features.

Key Features

The President Johnson II USA CB Radio is equipped with a range of features designed for enhanced communication and user convenience:

• 40 AM Channels for standard CB communication.
• Compatible with 12V and 24V vehicle power systems.
• Up/Down Channel Selector for easy navigation.
• Volume Adjustment with integrated ON/OFF switch.
• Manual Squelch and Automatic Squelch Control (ASC) for clear reception.
• Multi-functions LCD Display for clear status indication.
• Digital S-meter for signal strength monitoring.
• ANL (Automatic Noise Limiter), NB (Noise Blanker), and HI-CUT filters to reduce interference.
• Local DX key for optimizing reception range.
• Channels and Memories Scan function.
• 3 Programmable Memory Channels.
• F Function Key for accessing advanced settings.
• Beep Function for audible feedback.
• Dual Watch for monitoring two channels simultaneously.
• Preset Channels 9 (Emergency) and 19 (Road Information).
• Talkback function for monitoring your own modulation.
• Weather Channel with Alert function for severe weather warnings.
• Front Microphone Plug (6 pins) for convenient access.
• External Loudspeaker Jack for connecting an external speaker.
• Integrated Front Loudspeaker.
• VOX (Voice Operated Exchange) built-in for hands-free operation.

Setup and Installation

Proper installation is crucial for the performance and safety of your CB radio. Ensure the vehicle's power is off before beginning installation.

Mounting the Radio

Select a secure and accessible location in your vehicle, away from heat sources and direct sunlight. Use the provided mounting bracket and hardware to firmly attach the radio. Ensure adequate ventilation around the unit.

Power Connection

The President Johnson II USA operates on both 12V and 24V DC systems. Connect the red wire of the power cable to the positive (+) terminal of your vehicle's battery or a switched 12V/24V power source, and the black wire to the negative (-) terminal or chassis ground. It is recommended to hardwire the power cord directly to the vehicle's electrical system for stable power delivery. Install an appropriate fuse (not supplied) in the positive line close to the power source.

Antenna Connection

Connect a properly tuned CB antenna (not supplied) to the antenna connector on the rear of the radio. A well-matched antenna system is vital for optimal transmission and reception. Consult an expert if you are unsure about antenna tuning (SWR adjustment).

Microphone and External Speaker

Plug the microphone into the 6-pin jack located on the front panel. If desired, an external loudspeaker can be connected to the external loudspeaker jack on the rear of the unit for enhanced audio output.

Figure 2: Front view of the President Johnson II USA CB Radio with microphone.

Operating Instructions

Basic Operation

1. Power ON/OFF and Volume: Rotate the VOL knob clockwise to turn the radio ON and adjust the listening volume.
2. Channel Selection: Use the UP/DOWN buttons on the microphone or the channel selector on the unit to select your desired channel (1-40).
3. Squelch Control: Adjust the SQ knob to eliminate background noise when no signal is present. For automatic squelch, activate the ASC function.
4. Transmission: Press and hold the PTT (Push-To-Talk) button on the microphone to transmit. Release to receive.

Advanced Functions

• ANL/NB/HI-CUT: Press the corresponding buttons to activate noise reduction filters for clearer reception in noisy environments.
• Local DX: Use this key to optimize reception for local or distant signals.
• Scan: Activate the scan function to automatically sweep through channels or programmed memories.
• Memory Channels: Store frequently used channels into the 3 memory slots (M1, M2, M3) for quick recall.
• Dual Watch: Monitor two channels simultaneously. The radio will switch to the active channel.
• Preset Channels (9/19): Quickly access emergency channel 9 or road information channel 19.
• Talkback: Engage the Talkback function to hear your own voice through the speaker during transmission, helping you monitor your modulation.
• VOX (Voice Operated Exchange): This feature allows for hands-free transmission. When VOX is enabled, the radio will transmit automatically when it detects your voice. Adjust VOX sensitivity as needed.

Figure 3: Detailed view of the control panel.

Figure 4: VOX (Voice Operated Exchange) feature for hands-free operation.

Weather Channel with Alert

The radio includes 7 dedicated weather channels (162.400MHz to 162.550MHz) and a weather alert function. Activate this feature to receive NOAA weather broadcasts and alerts, providing crucial information during adverse weather conditions.

Maintenance

To ensure the longevity and optimal performance of your President Johnson II USA CB Radio, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the exterior of the radio. Avoid abrasive cleaners or solvents.
• Connections: Periodically check all cable connections (power, antenna, microphone) to ensure they are secure and free from corrosion.
• Antenna SWR: Regularly check your antenna's Standing Wave Ratio (SWR) to ensure it is properly tuned. High SWR can damage the radio's output stage.
• Storage: If storing the radio for an extended period, disconnect it from power and store it in a cool, dry place.

Troubleshooting

If you encounter issues with your CB radio, refer to the following common problems and solutions:

If the problem persists after attempting these solutions, please contact President Electronics USA customer support.

Specifications

Warranty and Support

The President Johnson II USA CB Radio comes with a 2-3 year warranty, as indicated on the product packaging. For detailed warranty conditions and to register your product, please visit the official President Electronics website.

For technical support, troubleshooting assistance, or warranty claims, please contact President Electronics USA customer service or visit their official store page:

President Electronics Official Website
President Electronics USA Amazon Store