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HF Vertical Phased Arrays
COMTEK ACB-4 Series Four-Square Switch Relay Units
COMTEK ACB-4 Series Four-Square Switch Relay Units use a well-established design and proven technology to offer any ham an advanced antenna system with s possible. Our phased array systems are affordable, simple to install, and easy to use. COMTEK ACB-4 Hybrid Four-Square Relay Units are single-band phasing and relay devices. They are typically in stock for every major HF contesting Amateur band and 30 meters; 60 meter array units are available by special order. Four-Square arrays are single band specific, due to antenna spacing and phasing feedline lengths, and for proper phasing and patterns. For manual operation, these relay units require the COMTEK ACB-4A Four-Square Control Console. It is now made to run on 12 to 14 Vdc, allowing easy operation of the four square array with battery emergency or International power sources. A DX Engineering factory-tuned cable feed system for the vertical array (available for your center frequency and sold separately) will provide the best performance. The ACB Series Hybrid Switch Relay Units also require a good 50 ohm, non-inductive dummy load. Contact DX Engineering for more information on Four Square Array components.
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$399.99
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$429.99
DX Engineering DVA Phasing Relay Units
DX Engineering DVA Phasing Relay Units are the band specific parts of the Dual Vertical Array Systems. These are larger, new Phasing Relay Units for any HF band, 160 through 10 meters. New heavy-duty components handle 2 kW continuous RF power for array performance at low SWR over a wide bandwidth. These mono-band weatherproof DVA Phasing Relay Units include a clamp for mounting directly between two ground-mounted, full-size, quarter-wave resonant verticals. Their companion DXE-EC-DVA Directional Control Console is a 3-direction array pattern selector that operates on 13.8 Vdc and features a 3-position rotary switch, directional LED indicators and scratch pads.. Dual Vertical Array end-fire directional patterns achieve a real front-to-back over 20 dB with typical array forward gain up to 3 dB over a single vertical. Specifications for the DX Engineering Dual Vertical Array: * Forward Gain (approx., compared to single vertical): 3 dB End-Fire; 1 dB Broadside-Omni * Front-to-back: Over 20 dB nominal, end-fire patterns * Power Handling: 2 kW continuous * RF Connectors: Three SO-239 (UHF female); Transmitter, Antenna 1, Antenna 2 * Control Cable: 3 conductors, min. 20 AWG * Control Cable Set-Screw Connectors: Relay Unit--external; Control Console--internal DX Engineering Dual Vertical Array mono-band phasing systems are available for each HF band, with 160, 80 and 40 meters in stock, and 60 30, 20, 17, 15, 12 and 10 meter systems available by special order. Your phased array pattern results may vary, due to band conditions, the surroundings at antenna and the radial system installation. Additional information is in the Dual Vertical Array instruction manuals, linked at each system description web page.
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$409.99
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$415.99