1. Product Overview
The GOOZEEZOO YAGI Antenna is a high-gain, directional antenna designed for 2m/70cm VHF/UHF amateur radio and GMRS repeater systems. It features a 3-element design providing 7dBi gain, enhancing signal strength and directionality for stable communication. Constructed from high-quality aluminum, this antenna is built to withstand various outdoor conditions, ensuring durability and reliable performance.
Important Note: This antenna is specifically designed for amateur satellite use and is suitable for circularly polarized signals from amateur satellites, hence the higher gain. When used for repeating or direct frequency applications, polarization conversion may be required for optimal performance.
2. Key Features
- Antenna Type: 3 Elements Yagi
- Frequency Range: VHF 430-440MHz & UHF 144-148MHz
- Gain: 7dBi
- Power Handling: 50W
- SWR: <1.3
- Impedance: 50Ω
- Weight: 0.67 lb (approximately 300g)
- Construction: Sturdy and weather-resistant aluminum.
- Portability: Easy assembly and disassembly for convenient transport.
- Applications: Suitable for Baofeng, Motorola, Yaesu, Kenwood amateur 2-way radios, GMRS repeater systems, police scanners, 433MHz radio systems, data radios, satellite work, ISS contact, and digital radios.
3. Package Contents
The package includes all necessary components for assembly and mounting:
- 1x Main Antenna Boom with Coaxial Connector
- 3x Antenna Elements (numbered for easy identification)
- 1x U-Bolt Mounting Kit (includes U-bolt, bracket, nuts, and washers)
- 1x Tuning Bar (hex key for adjustments)
Image: Main components of the GOOZEEZOO YAGI Antenna, including the boom and elements.
4. Setup and Assembly
Follow these steps to assemble your YAGI antenna:
- Attach Elements: Each antenna element is numbered. Insert element #1 into the corresponding threaded hole on the main boom and tighten securely. Repeat for elements #2 and #3. Ensure they are firmly seated.
- Mounting Bracket Assembly: Attach the U-bolt bracket to the designated mounting point on the main boom using the provided nuts and washers. The bracket is designed to secure the antenna to a support pole.
- Pole Mounting: Position the antenna on your desired support pole (diameter 15-40mm). Secure it by tightening the U-bolt around the pole and through the bracket. Ensure the antenna is stable and oriented correctly for your application.
- Coaxial Cable Connection: Connect your coaxial cable to the antenna's connector. Ensure a tight and secure connection to minimize signal loss.
Image: Detailed diagram illustrating the correct assembly of the 3-element Yagi antenna, including element insertion and mounting.
Image: Close-up view of the U-bolt and bracket, showing how the antenna attaches to a support rod with a diameter of 15-40mm.
5. Operation and Tuning
After assembly, it is recommended to test and tune your antenna for optimal performance:
- SWR Measurement: Connect an SWR (Standing Wave Ratio) analyzer to your antenna. Sweep across the desired frequency range (e.g., 420-450MHz for 70cm band) to identify the lowest SWR point.
- Tuning: Use the provided tuning bar (hex key) to adjust the length of the elements if necessary. Shortening elements typically shifts the resonant frequency higher, while lengthening them shifts it lower. Aim for an SWR of less than 1.3 for best performance.
- Directionality: Due to its directional nature, orient the antenna towards the desired signal source (e.g., repeater, satellite, or other station) for maximum signal reception and transmission.
Image: An SWR graph displaying the antenna's performance, indicating low SWR around 435MHz, which is ideal for the 70cm band.
Image: The Yagi antenna deployed outdoors on a tripod, demonstrating its portability and suitability for field operations.
6. Technical Specifications
| Attribute | Value |
|---|---|
| Antenna Type | 3 Elements Yagi |
| Frequency Range | VHF 430-440MHz & UHF 144-148MHz |
| Gain | 7dBi |
| Power | 50W |
| SWR | <1.3 |
| Impedance | 50 Ohms |
| Weight | 0.67 lb (372 g) |
| Product Dimensions (L x W x H) | 20.3L x 6.1W x 6.1H Centimetres |
| Material | Aluminum |
| Color | Silver |
7. Troubleshooting
- Poor Signal Reception/Transmission:
- Check all coaxial cable connections for tightness and proper seating.
- Verify antenna orientation towards the desired signal source.
- Perform an SWR test to ensure the antenna is tuned to the operating frequency. Adjust elements if SWR is high.
- Ensure proper polarization (vertical or horizontal) for your application, especially for satellite or direct frequency use.
- Antenna Instability:
- Ensure the U-bolt and bracket are securely tightened to the support pole.
- Verify the support pole is stable and capable of holding the antenna in windy conditions.
- Missing or Damaged Parts:
- Refer to the "Package Contents" section to confirm all parts are present. Contact customer support for replacements if necessary.
8. Warranty and Support
For warranty information, technical support, or any inquiries regarding your GOOZEEZOO YAGI Antenna, please refer to the product's official sales platform or contact GOOZEEZOO customer service directly. Keep your purchase receipt for warranty claims.
