G1000DXC
The YAESU G-800DXC, G-1000DXC and G-2800DXC antenna rotators are designed to handle large tower-mounted antennas for both amateur and professional applications. These rotators allow precise remote control of antenna pointing from the operating station.
The rotator design uses 3/8-inch double-layer ball bearings to distribute the load evenly across the entire diameter of the housing, reducing wear and virtually eliminating the possibility of water ingress since there is no shaft hole in the top of the device.
Unlike older models, which use alternating current (AC) motors, the G-800DXC, G-1000DXC and G-2800DXC are equipped with a variable voltage direct current (DC) motor, eliminating the need for a large starting capacitor, which is prone to failure due to external temperature variations. This ensures more reliable and maintenance-free operation, as the rotator is housed in a die-cast aluminum housing coated with melamine resin.
The sleek, modern tabletop controller allows for full 360-degree radial indication of the antenna's true azimuth. The user can select rotation rates ranging from 40 to 100 seconds for a full 360-degree rotation on the G-800DXC and G-1000DXC models, and 50 to 120 seconds for the G-2800DXC model. Additionally, a desired steering angle can be preset and the rotator will automatically turn to that position.
A special feature of the G-2800DXC is the incorporation of the "auto slow start" and "auto slow stop" functions when a high rotation speed is selected. This prevents sudden shocks to the antenna system and tower. The rotator starts to rotate slowly and as it approaches the desired direction, the rotation automatically slows down, providing a smooth stop.
The rotator can rotate up to 450 degrees, allowing a full turn through points north, south, or both, if desired. Additionally, the rotator's stop position (the point through which it cannot turn) can be selected, providing flexibility in antenna control.
The G-800DXC and G-1000DXC come with a mast clamp and necessary installation hardware, while the G-2800DXC includes a 40-meter control cable to simplify the installation process. Additionally, all models are compatible with the GS-232B computer control unit, allowing the antenna position to be controlled by a computer via an RS-232 interface.
These rotators are ideal for those looking for a reliable, durable and efficient rotation system for large antennas, with advanced remote control and safety features that protect the equipment and prolong its useful life in adverse weather conditions.
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Kit contents
- 1 Rotor G-1000CDC
- 1 Table Controller
- 1 Connector for 7 pin rotor
- 1 Connector for the 6-pin table controller.
Example of Installation of Tower Mounted Antennas with YAESU G-1000DXC
Below is an example of how to calculate a tower mounted antenna installation using the K factor and wind loading area to ensure the installation is safe and compatible with the YAESU G-1000DXC rotator.
Requirements:
- Wind Load Area: The wind load area of the antenna should be less than 2 m² for the YAESU G-1000DXC .
- K Factor: Should not exceed 180 for the YAESU G-1000DXC .
Formula for calculating the K factor:
K = [Antenna radius of gyration (m)] × [Antenna weight + Mast weight (kg)]
Installation Example:
- 14 MHz Yagi Antenna:
- Turning radius: 7.5 m
- Antenna weight: 14 kg
- Surface area: 0.7 m²
- Mast weight: 5 kg
- 21/28 MHz Trapped Yagi Antenna:
- Turning radius: 3.5 m
- Antenna weight: 13 kg
- Surface area: 0.3 m²
- Mast weight: 5 kg
K Factor Calculation:
- Step 1: Calculation of K1 for the 14 MHz antenna:
- K1 = Turning radius (7.5 m) × [14 kg + (5 kg ÷ 2)] = 7.5 × 16.5 = 123.75
- Step 2: Calculation of K2 for the 21/28 MHz antenna:
- K2 = Radius of gyration (3.5 m) × [13 kg + (5 kg ÷ 2)] = 3.5 × 15.5 = 54.25
- Step 3: Calculating Total K:
- Total K = K1 + K2 = 123.75 + 54.25 = 178
Wind Load Area Calculation:
The total wind loading area is the sum of the surface areas of both antennas:
0.7 m² + 0.3 m² = 1.0 m²
Result:
- Wind loading area: 1.0 m², within the specifications of the YAESU G-1000DXC .
- Total K-factor: 178, which means this antenna system is compatible with the YAESU G-1000DXC , since the K-factor is within the limit of 180.
Conclusion:
The antenna system can be safely installed using the YAESU G-1000DXC rotator, which supports both the wind loading area and the calculated K factor.
