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InnovAntennas HF Directional Antennas
InnovAntennas DXR Series Multi-Band HF Beams
InnovAntennas DXR Series Multi-Band HF Beams have short booms with full-size elements or capacity-loaded shortened elements, all with excellent performance, making them very popular internationally. The DXR Series interlaced-element antennas, optimized by G0KSC over a long period of time, achieve the best possible balance between compact size and performance. For the DXR Series Multi-band Yagis, equal attention was paid to a very solid construction and sufficiently small component and packaging size, to keep shipping costs within reasonable limits. Click on any model listed for specific details and specifications. InnovAntennas DXR Series Multi-Band HF Beams are available exclusively from DX Engineering in North America. Important features of InnovAntennas DXR Series Multi-Band HF Beams: * No traps, matching links, or hairpins * Only one feed line for all bands * Careful selection of materials without regard to cost * Very robust construction with still manageable package size The DXR Series beams use a 1.97 x 1.97 in. (50 x 50 mm) square boom with 0.078 in. (2 mm) wall thickness. A square boom has the advantage that the elements cannot twist in the plane. On the other hand, it is slightly heavier than a round boom of the same stiffness. The DXR Yagis do not require any bracing of the boom. The longest elements are 1.378 in. (35 mm) diameter in the middle and taper relatively quickly to achieve a good compromise between weight and strength. This construction also helps to avoid constant vibration even in light winds. With these multi-band Yagis, care has been taken to ensure that there are never more than the elements of three bands nested within each other. This is because each additional element for one band can cause interference on another band. This negative effect was avoided by careful manual optimization. The result is the best possible matching over a wider band range than other antenna designs. In most cases, no tuner is necessary; the SWR minimum can be precisely set by adjusting the element lengths. Due to the robust construction and the absence of moving or electrically active components such as coils, traps, hairpins, etc., an InnovAntennas DXR beam is maintenance-free for many years. The insulators are UV-resistant and designed for a wide temperature range. The mounting hardware uses sea-water resistant stainless steel and the aluminum is type T6 6066/6082, which is also used in aviation. It is nice not to have to climb the mast every year to maintain the antenna. The DXR Series Multiband beams are designed to require only one feed line. This makes installation on a mast with a rotor very easy. And the use of modern SDR transceivers, which allow the observation of several bands at the same time, becomes really useful. The one feed line is connected directly to the solid distribution rails of the fed elements. By avoiding baluns, matching elements, traps, or hairpins for tuning, transmit power is only limited by the coaxial cable and connectors. Note: Front-to-back ratio (F/B) and SWR bandwidth data for the DXR Series will be added as it becomes available. Many models of the DXR Series are available as a "super-compact" version, on which the longest elements have been shortened with capacity hats, thus reducing their turning radius considerably. The installation of these impressive antennas is possible even where space is limited.
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$2,097.99
InnovAntennas DXC-240 2 Element Compact 40 Meter Yagi
InnovAntennas DXC-240 2-Element Compact 40 Meter Yagi features very good efficiency, a relatively small footprint and exceptional bandwidth. 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 middle 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. (6.73 m). 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 40 m that can achieve gain of about 10.53 dBi at 65.6 ft. (20 m) 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.
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$2,160.00
InnovAntennas 13 Element HF Log Periodic Dipole Arrays
InnovAntennas 13 Element HF Log Periodic Dipole Arrays provide super wideband, high performance from 10 to 54 MHz. InnovAntennas LPDA's are designed using the very latest computer optimization techniques such as Dense Element Log Periodic Dipole Array (DELPA). This type of antenna was designed with specifications for a broadcasting center. Example photos display the DELPA-13 installed at the broadcast center. If you are looking for the best of the best from both a performance and mechanical construction perspective, then look no further than InnovAntennas LPDA! You have come to the right place! The DELPA-13 has 13 elements placed above the 37.73 ft. (11.5 m) by 3 in. (76mm) square boom, from which all elements are insulated. The feed point is 200 ohm and includes a 20 kW 4:1 balun. Feed line between the elements is silver plated hard-drawn copper wire spaced to produce a 300 ohm balanced-line feed. The DELPA-13 provides excellent, consistent results for the frequency range it covers with a relatively limited number of elements. Some of InnovAntennas HF Log Periodic Dipole Array mechanical design benefits include: * Marine grade stainless steel hardware (wherever possible) * Integrated feed line/boom for maximum efficiency, minimum wind-load * Silver plated balanced line feed * Mill finished for highest levels of accuracy and performance Performance specifications of InnovAntennas 13 Element HF Log Periodic Dipole Array DELPA-13: * Typical forward gain: 6dBi * Typical F/B: 15dB * Gain at 33 ft. (10 m) above ground: 10dBi * Power rating: 15 kw+ (further limited by feedline and connectors) * Feed impedance: 50 Ohm * Boom length: 37.73 ft. (11.5 m) * Weight: 165.35 lbs. (75 kg) * Turning radius: 20.67 ft. (6.3 m) * Wind loading: Upon application * Wind survival: 100 mph (160 kph)
Not Yet Reviewed
$4,100.00
InnovAntennas 10 Element HF Band Optimized Log Periodic Antenna
InnovAntennas 10 Element HF Band Optimized Log Periodic Antenna is a super wideband, high performance beam that covers the frequency range of 14 to 30 MHz. The advantage of this antenna type is the extreme broadband performance with an even gain curve without dips. This makes this antenna suitable not only for amateur radio, but also for commercial services and for demanding SWLs. Through careful calculations and practical optimization, the spacing and lengths of the elements have been chosen to favor the amateur radio bands 20/17/15/12 and 10 meters, creating the Band Optimized Log Periodic Antenna, hence the name "BOLPA". Hundreds of hours optimizing both SWR and performance within the Amateur bands resulted in exceptional mono-band style performance for InnovAntennas BOLPA-10. This antenna provides a uniform gain of approximately 7 dBi over the entire frequency range and a front-to-back ratio over 20 dB on all but 12 meters with an SWR of mostly better than 1.5:1. The boom length of 25.3 ft. (7.7m) is relatively short for an antenna of this type. Since only one 50 ohm feed line is necessary, this broadband antenna is especially well suited for use with modern SDR transceivers that are able to receive on several HF bands simultaneously. This LPDA's double boom is made of 1.75 in. (44 mm) square aluminum, each supporting the alternately arranged elements and provides the support for the bracing in the middle. Both boom tubes serve as feed lines for high power operations on any band with no tuning adjustments necessary. A common mode choke or balun may be used. High quality aircraft grade aluminum, as well as stainless steel parts, means the BOLPA-10 is also designed for adverse weather and high wind speeds of up to 99 mph (160 kph). Some of InnovAntennas HF Log Periodic Dipole Array mechanical design benefits include: * Marine grade stainless steel hardware (wherever possible) * Integrated feed line/boom for maximum efficiency, minimum wind-load * Mill finished for highest levels of accuracy and performance * First-of-kind "Band Optimized" LPDAs by G0KSC InnovAntennas BOLPA-10 technical performance data: * Gain: 6.9 to 7.5 dBi (4.75 to 5.4 dBd) * Gain at 33 ft. (10m) above ground at 14.150 MHz: 11.56 dBi (including ground gain) * Typical F/B: Over 20 dB * Power rating: 5,000 watts (further limited by feedline and connectors) * Feed impedance: 50 ohm, stud connections * Boom length: 25.3 ft. (7.7 m) * Longest element: 42.6 ft. (13 m)
Not Yet Reviewed
$2,190.00