1. Introducció
This manual provides essential instructions for the proper installation, operation, and maintenance of your PNI Extra 48 CB Antenna. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.

Image 1.1: The PNI Extra 48 CB Antenna, featuring its compact design, magnetic base, and integrated cable with PL259 connector.
2. Informació de seguretat
- Ensure the antenna is securely mounted to prevent detachment during vehicle movement.
- Eviteu instal·lar l'antena a prop de línies elèctriques o altres riscos elèctrics.
- Do not operate the CB radio without the antenna properly connected, as this can damage the radio.
- Regularly inspect the cable and connectors for wear or damage.
3. Contingut del paquet
The PNI Extra 48 CB Antenna package includes the following components:
- Antena CB
- RG174 cable (4 meters)
- PL259 connector
- Manual d'usuari
- Certificat de garantia
4. Configuració i instal·lació
Proper installation is crucial for optimal performance of your CB antenna. Follow these steps carefully:
4.1. Muntatge de l'antena
- Desembaleu tots els components de la caixa.
- Attach the antenna whip to the magnetic base. Ensure it is securely tightened.
- Verify the rubber base is properly seated on the magnetic mount to protect the vehicle's surface from scratches.

Imatge 4.1: Primer pla view of the magnetic base, showing the connection point for the antenna whip and the protective rubber base.
4.2. Muntatge de l'antena
- Choose a flat, metallic surface on your vehicle, preferably the center of the roof, for optimal signal performance.
- Clean the mounting surface thoroughly to ensure maximum magnetic adhesion.
- Place the magnetic base firmly on the chosen surface. The magnetic mount provides a strong hold without permanent installation.
- Route the RG174 cable carefully into the vehicle, avoiding sharp bends or pinching that could damage the cable. Ensure the cable is not exposed to excessive heat or moving parts.
- Connect the PL259 connector to your CB radio's antenna input.

Image 4.2: The magnetic base with the RG174 cable attached, ready for mounting on a vehicle surface.
4.3. SWR (Standing Wave Ratio) Adjustment
While the PNI Extra 48 antenna is designed for a low SWR (typically 1.2), it is recommended to check the SWR after installation using an SWR meter. An SWR reading close to 1.0-1.5 indicates efficient power transfer and optimal performance. If the SWR is too high, repositioning the antenna or checking connections may be necessary.
Video 4.1: This video demonstrates the assembly, features, and installation process of the PNI Extra 48 CB Antenna, including its magnetic mounting and aerodynamic design. It also briefly shows SWR measurement.
5. Operating the CB Antenna
Once installed and tuned, the PNI Extra 48 CB Antenna is ready for use with your CB radio. This antenna is designed for reliable communication over distances up to 10 km, depending on terrain and environmental conditions.
- Ensure your CB radio is properly connected to the antenna before powering on.
- Select the desired channel on your CB radio.
- Adjust the squelch and volume controls on your CB radio for clear reception.
- For transmitting, press the Push-To-Talk (PTT) button on your microphone and speak clearly.
6. Manteniment
To ensure long-term performance and reliability of your PNI Extra 48 CB Antenna, follow these maintenance guidelines:
- Neteja regular: Periodically clean the antenna whip and magnetic base with a soft, damp tela. Eviteu els netejadors abrasius.
- Inspecció del cable: Inspect the RG174 cable for any signs of wear, cuts, or kinks. Damaged cables can degrade performance.
- Magnetic Base Check: Ensure the magnetic base is free of debris and the rubber protective layer is intact to prevent scratches on your vehicle.
- Cura del connector: Keep the PL259 connector clean and dry. Apply a small amount of dielectric grease if operating in harsh weather conditions to prevent corrosion.
7. Solució De Problemes
If you experience issues with your PNI Extra 48 CB Antenna, refer to the following common problems and solutions:
| Problema | Causa possible | Solució |
|---|---|---|
| Poor reception/transmission | High SWR, loose connections, damaged cable, improper mounting location. | Check SWR, ensure all connections are tight, inspect cable for damage, relocate antenna to a clearer, metallic surface. |
| Antenna detaches during driving | Unclean mounting surface, insufficient magnetic contact. | Clean the mounting surface thoroughly, ensure the magnetic base is fully seated. Avoid placing over non-metallic areas. |
| Excés d'estàtica o soroll | Electrical interference, poor grounding, damaged cable. | Check vehicle's electrical system for interference, ensure good ground connection for the CB radio, inspect antenna cable. |
8. Especificacions tècniques
| Característica | Especificació |
|---|---|
| Marca | PNI |
| Model | 48 extra |
| Freqüència | 26 - 28 MHz |
| Guanyar | > 5 dBi |
| SWR (relació d'ona estacionària) | ≤ 1.2 (typical) |
| Potència màxima | 150 watts |
| Impedància | 50 ohms |
| Longitud del fuet | 440 mm (aprox. 17.3 polzades) |
| Tipus de cable | RG174 |
| Longitud del cable | 4000 mm (4 meters / approx. 13.1 feet) |
| Polaritat | Vertical |
| Material | Fiberglass whip |
| Muntatge | Magnetic base (103 x 66 x 40 mm) |
| Àmbit de comunicació | Up to 10 km (approx. 6.2 miles) |
9. Informació de la garantia
This product comes with a warranty certificate. Please refer to the included warranty certificate for details regarding coverage, terms, and conditions. Keep your proof of purchase for warranty claims.
10. Atenció al client
For further assistance, technical support, or inquiries about the PNI Extra 48 CB Antenna, please visit the official PNI store or contact customer service.
Official PNI Store: Botiga PNI a Amazon





