With the DB11, you don’t have to give up performance to fit the antenna into a small space!
The DB11 is the smallest of our Yagi antennas that uses loop technology. This is a distinctive advantage, allowing for a 40% smaller size platform with excellent performance. The DB11 uses an integral coax switch to select which one of the three elements are driven to give equal performance in forward and reverse directions. The control of the Antenna and Coax switch is integrated into the SDA 100 controller for effortless tuning. The DB11 is our only antenna without the optional 6m passive element kit – the spacing of the 3 elements turns out to be ideal for 6m as well.
With two active elements on 20m and three active elements above 20m, an average of 7 DB of gain, and 20 DB front/rear ratio is obtained on each band.
*Due to the confusion about the EIA/TIA wind ratings, SteppIR is now using PROJECTED AREA as the measurement for our customers to utilize when sizing an antenna to a tower. Projected area by definition is the total perpendicular surface area measured in square feet/square meters, that is exposed to wind. To calculate wind load you always take the largest projected area whether that is from the perspective perpendicular to the boom or perpendicular to the elements. In the case of SteppIR Yagi’s, the maximum projected area will always be the sum of the surface area’s perpendicular to the Yagi elements. This calculation is a constant number and will not change regardless of EIA specification changes. Be sure to present this information (along with the weight of the antenna, turning radius, element lengths, height of antenna, location exposure category, locations three-second gust wind speed, and locations maximum radial ice loading) to your structural engineer and/or tower manufacturer so that they can specify the correct product for your antenna.
Weight 63 lb / 28.57 kg *Projected Area 11.08 sq ft / 1.03 sq m Longest Element 19 ft / 5.79 m Turning Radius 10.5 ft / 3.2 m Boom Length 11 ft / 3.35 m Mast Hardware 2.0 in / 5.08 cm Power Rating 3 KW Frequency Coverage 13.8 MHz—54 MHz Cable Requirements 16 conductor 22 ga shielded Tuning Rate 1.33 ft/sec - 0.4 m/sec
Band dBi Gain DB F/R 20m 6.41 19.53 17m 7.02 16.19 15m 7.08 21.35 12 m 7.25 23.17 10 m 7.46 24.55 6 m 8.76 15.09