Momobeam Tetra15-DF 40/20/15/10M Dual Feed Yagi Antennas

Momobeam Tetra15 DF 40/20/15/10M Dual Feed Yagi Antennas are multiband HF Yagi antennas engineered with an exceptionally compact design while maintaining high level performance across all four operating bands. On 40 meters, these antennas utilize a Reflector/Driver configuration with element lengths reduced through end loading, a technique originally adopted by W6NL that preserves near full size performance while minimizing overall dimensions. On 20 meters, they employ full-size elements arranged as a reflector, driver, and director, providing strong forward gain and clean directional behavior. For both the 15 meter and 10 meter bands, the antennas incorporate four active elements configured as a reflector, driver, and two directors, ensuring excellent gain and front to back ratios across the higher frequency ranges. Their dual feed architecture allows contest stations to operate on two bands simultaneously, delivering monoband level performance to each operator when paired with appropriate band pass filtering.

These antennas include an assembly tool along with spare bolts and aluminum tubing, and they are built on a square boom structure that simplifies the installation process. All hardware is packaged in individually labeled bags, and each aluminum element is clearly marked, enabling fast, intuitive assembly. The system requires two separate coaxial feedlines—one dedicated to the 40 meter band and the other serving the combined 20/15/10 meter array. A medium to heavy duty rotator is recommended for proper operation. Each antenna is supplied with two 3kW RF choke baluns as standard equipment, a notable advantage since many competing manufacturers only offer these components as optional upgrades.
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