Description
The HamGeek GPTWO-PRO 7-54MHz portable antenna presents a practical solution for amateur radio operators seeking a compact, field-ready antenna system.
Designed for HF operations, this device combines portability with functional performance across multiple frequency bands, making it suitable for both fixed and temporary installations. It’s technical specifications aligns with standard requirements for ham radio applications, though users should consider environmental factors when evaluating its effectiveness.
Multi-bahd operation
The antenna operates within a 7-54MHz range, covering 40 metres (7MHz) all the way up to 6 metres (50MHz), which are critical for HF communication. Its quarter-wave design on the 20 metre band (and up) ensures natural resonance, while the 40 metre band relies on an integrated loading coil to achieve a good match. This configuration allows the antenna to function across a broad spectrum, though efficiency may vary depending on installation conditions. The vertical polarization and 2dBi gain provide directional characteristics consistent with typical GP (Ground Plane) antennas, making it suitable for local, regional, and international communication scenarios.
Compact and portable
Portability is a defining feature of this system. With a total storage length of 53cm (20.9 inches) and a net weight of 1.3kg (2.9lbs), the antenna is well-suited for transport in a backpack or vehicle. The telescopic design allows users to adjust the antenna’s height, which can be advantageous when optimizing performance for specific locations. Setup requires minimal effort, with installation reportedly able to be completed by one person in under five minutes, a significant benefit for operators prioritizing rapid deployment during field operations or emergency scenarios.
Complete kit
The included accessories provide flexibility for various installation environments. The telescopic antenna (5.6m/18.4ft), loading coil, extension pole, and GP antenna socket form the core assembly. Additional components such as ground pins, counterpoise stabilizers, and radial cables address common challenges in achieving effective grounding and reducing signal loss. The four counterpoises, each comprising 8 individual wires, enhance the antenna’s efficiency by improving the radiation pattern, though performance may degrade in areas with low soil conductivity. Operators are advised to prioritize installation sites with moist or conductive terrain, such as near water bodies or coastal regions, to maximize effectiveness.
Technical parameters demonstrate reliability for SSB, CW, and FM operations up to 200W. The standing wave ratio (SWR) of less than 1.5 across all bands indicates a well-matched system, reducing the risk of damage from impedance mismatches. However, users should note that SWR values may vary based on local conditions, requiring careful monitoring during setup. The antenna’s wide bandwidth is highlighted as a key advantage, enabling operation across multiple frequencies without frequent adjustments, a feature appreciated by multi-band enthusiasts.
Conclusion
While the product excels in portability and ease of use, it is not without limitations. The 40 metre band’s performance is slightly compromised due to the loading coil, which introduces minor inefficiencies compared to a full quarter-wave antenna. Additionally, the handmade nature of certain accessories may result in minor production imperfections, which could affect consistency. Operators should account for these factors when evaluating suitability for their specific needs.
In summary, the HamGeek GPTWO-PRO offers a balanced approach to portable HF communication. Its compact design, ease of deployment, and technical specifications make it a viable option for operators requiring flexibility without sacrificing performance. While not optimized for all environments, its adaptability and practical features address common challenges faced in field operations, making it a reliable tool for amateur radio enthusiasts.