features very good efficiency, a relatively small footprint and exceptional bandwidth.

InnovAntennas DXC-240 2 Element 40 Meter Yagi

There are several methods to shorten a dipole or the elements of a beam, including loading coils and capacity hats. However, coils reduce efficiency if they are mounted too close to the boom of the Yagi and capacity hats can reduce the length by only a few percent. Through careful calculation and robust construction, InnovAntennas designer Justin Johnson, G0KSC, has managed to craft this two-element beam for 40 the meter band with a boom that is just under 23 ft. (7m) in length. The elements have a maximum length of 37.73 ft. (11.5m) and this beam achieves a 2:1 SWR bandwidth of 120 kHz without the use of an antenna tuner.

The DXC-240 is a rugged, seriously heavy-duty 40 meter Yagi featuring a 2.362 in. (60mm) square boom with a wall thickness of 0.079 (2mm), making it very stable, even without truss ropes. The elements use 1.97 in. (50mm) diameter aluminum tubes in the middle, which quickly taper to 0.98 in (25mm) at the ends. The DXC-240 has a wind area of 13.5 sq. ft. (1.25 sq. m), weighs 110 lbs. (50 kg) and has a turning radius of 22.1 ft. (6.73m). Solidly constructed, efficient loading coils are at the middle of each half element, exactly where they belong to minimize losses and maximize bandwidth! Additional efficient reduction of length is achieved with capacity hats at the ends of the elements.

The result is a compact 2-Element Yagi for 40m that can achieve gain of about 10.53 dBi at 65.6 ft. (20m) above ground with a spec of 6.29 dBi free space gain and a typical front to back of 15 dB. Impedance matching with an adjustable hairpin that provides a 50 ohm feedpoint that does not negatively affect the usable bandwidth.

Order the InnovAntennas DXC-240 2-Element Compact 40 Meter Yagi from DX Engineering. Enjoy an efficient and heavy-duty 40 meter 2-element beam that is so compact, it can be installed at many radio amateur’s stations.