Availability
4 Results Found For "stack"
DX Engineering PS-3B PRO-STACK Three Antenna Phasing System
Dominate the airwaves with a DX Engineering PS-3B PRO-STACK Three Antenna Phasing System. Achieve ultimate array control and performance with three identical Yagi or Log Periodic directional antennas or use the system for vertical antennas in a phased array. DXE-PS-3B Pro-Stack Units are frequency independent broadband phasing devices that operate with three antennas on any bands, from 160 through 10 meters. Select from twelve combinations of in-phase and out-of-phase for pattern and null steering that wins contests and snags the rarest DX! DXE-PS-3B-P PRO-STACK Three Antenna Phasing Systems consist of one DXE-PS-3B Relay Unit and one DXE-EC-PS3 Control Console with manual 12-position rotary switch. This advanced system requires only 9-conductor control cable and standard 50-ohm feedlines of equal lengths to each antenna. DXE-PS-3B Pro-Stack Broadband Three Antenna Phasing Systems offer these compelling features: - Power Handling up to 5 kW - Broad band coverage on 160-10 meters - RF Shielded Weatherproof Housing - unique protection - DXE-PS-3B has High-RF tolerant, silver - PTFE SO-239 (UHF female) connectors - DXE-PS-3BN-P are high-quality silver-PTFE Type N female connectors - DXE-PS-3BDIN has Amphenol Connex 7-16 DIN Panel Connectors - Proven high current DX Engineering RF Relays - Safe 12 volt DC relay operation - MOV surge protection on control lines - RoHS compliant assembly DXE-PS-3B Broadband Phasing Units provide the greatest flexibility for three identical antennas. This relay unit contains a broad-bandwidth high-power 2:1 impedance matching transformer. This eliminates common requirements of using mixtures of 75 ohm and 50 ohm phasing or delay cables for impedance matching. Feedlines to each antenna from the relay unit must be the same cable of the same length and match the antenna impedance. So all of them need only be as long as the longest, to reach from the antennas to the relay unit. While it is best to have feedlines of equal electrical lengths, there is no need to closely phase-match cables; cutting the antenna feedlines made from the same coax to equal physical lengths is sufficient. To ensure lowest SWR, impedance matching automatically changes when any antenna is disabled. By switching between antennas at different heights above ground and/or changing the phase relationship between multiple antennas. The old standard system in stacks was to activate or disable specific antennas in the stack to change pattern. However, with the Pro-Stack system, gain remains higher when all antennas are driven and phase is changed, plus this system allows phase inversion as well as the ability to switch any single antenna out of the array. Signals arrive at your antenna system from different azimuth directions and different elevation angles. Adding a stacking phasing system to a rotational array adds the ability to steer the pattern of the antenna array in two planes, azimuth and elevation, and to move the major lobe and nulls. This is accomplished by switching between three identical antennas that are properly spaced for phasing, as well as changing the phase relationship between the antennas to effect changes in the null positons of their elevation patterns. The greatest advantage of equipping your array with a DX Engineering Pro-Stack is the ability to move debilitating pattern nulls away from signal arrival angles. While gain makes a marginal improvement, moving a 20 to 40 dB null can make a phenomenal change in reception. So, the Pro-Stack can make the difference between a barely readable and a strong signal, thus providing the performance edge needed to work rare DX - and win contests. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Get a DX Engineering PS-3B PRO-STACK Three Antenna Phasing System for your winning antenna array.
( 1 )
$1,101.98
—
$1,205.98
InnovAntennas 10M or 11M LFA-Q Loop-Fed Quad Beams
InnovAntennas 10M or 11M LFA-Q Loop-Fed Quad Beams from G0KSC represents significant development of LFA Yagis with a substantial difference: LFA-Q (Loop Fed Array Quad) Beams use top and bottom booms with through-boom LFA Yagi-style loops arranged vertically for every element. This very rugged design achieves better gain for a given length of boom and much lower noise for better signal quality compared to conventional Yagi antennas. InnovAntenna LFA-Q quad structure provides high directivity, eliminating unwanted spurious radiation. They achieve great side and rear rejection while retaining excellent gain, front-to-back and SWR bandwidth across the band. These are amazingly compact, high gain directional antennas, constructed to withstand serious weather conditions! Antennas of this series can be built and tuned to operate on a 500 kHz section of the 10 meter 28 MHz Amateur Band or on the 11 meter 27 MHz Citizens Band. The desired band is easily selected by changing the length of the outer element sections during construction – exact dimensions are provided in the instructions. The driven loop element feedpoint impedance is 50 ohms which allows a direct feed at high transmitting power. Vertical stacking of two or more antennas can significantly increase directivity, gain and signal quality; an interesting alternative when available space prevents the installation of long boom beam antennas. Just like other HF quads, LFA-Q vertical loop-fed quads are inherently quieter than a Yagi of the same size, making them a perfect choice for use in any location with high ambient noise level, such as a city or densely populated neighborhood. There is a 10M or 11M LFA-Q Loop-Fed Quad Beam version that matches your space, support, and wallet: - The 2-element economy version has loop spacing booms of only 2.3 ft. (70 cm); - The 3-element compact version booms are 10.5 ft. (3.2m) in length: - The 4-element performance model boom lengths are 26.9 ft. (8.2 m). Each LFA-Q is very stable mechanically, with mast clamps on each boom, top and bottom! Thanks to the use of high-quality materials, extensive modeling and testing, the durability and reliable performance of InnovAntennas 10M or 11M Loop-Fed Quad Beams is undeniable.
Not Yet Reviewed
$1,269.99
—
$1,419.99
Momobeam Mono4-15 Monoband Yagi Antennas
Momobeam Mono4 15 Monoband Yagi Antennas are full size, four element antennas engineered to deliver excellent SWR bandwidth, optimal gain, and strong front to back performance on the 15 meter band. Lightweight for easy handling yet built to withstand harsh weather conditions, these antennas provide reliable performance for both standalone installations and multi stacked array configurations. The MONO4 15 performs exceptionally well in stacked systems, whether optimized for maximum forward gain or arranged to broaden directional coverage across wider geographic regions—making it a powerful choice for serious DX operators and advanced contest stations. Constructed on a sturdy square boom, each antenna includes an assembly tool, spare hardware (bolts and aluminum tubing), and fully labeled components. All hardware is packaged in separate, clearly marked bags, and every aluminum tube is labeled to ensure fast, accurate, and stress free assembly. Suitable for mast mount or side mount tower installations, the MONO4 15 requires a medium duty rotator for proper operation. A 3kW RF choke balun is included as standard equipment—an essential component that many manufacturers offer only as an optional upgrade. Momobeam RF Chokes are built using high quality, low loss, double shielded coaxial cable with a Teflon dielectric, combined with carefully selected ferrite material sleeved over the cable. Together, these elements create a high impedance path for RF, providing excellent isolation between the antenna and the coaxial feedline. The Mono4-10 requires a medium duty rotator for proper operation.
Not Yet Reviewed
$1,329.99
Hamplus Antenna Control Switching Devices
Hamplus Antenna Control Switching Devices include automatic band data controlled remote antenna switching systems including full web remote capability without a PC. Hamplus automates HF + 50 MHz switching for 8 to 16 antennas and from 2 to 8 radios, including devices to connect multiple directional controllers to as many as 8 different antenna rotators. Band-data and frequency reading, multi-function control consoles include support for all major brand transceivers with radio specific control cables. Hamplus also offers manual multi-port to multi-radio antenna switches and a four-stack antenna switching system. Years of Amateur Radio and professional experience shows in these components for emerging and elite DXers as well as established multi-radio contest stations. Hamplus products will improve the function and performance of your station. Click on each part number for specific descriptions, specifications, more information and links to compatible or required products.
( 11 )
$1,177.99
—
$1,410.99