The 4-Square Controller
This controller was designed to connect 4 shortened antennas using Hi-Z amplifiers into a directional receiving antenna. The controller can be used with single band passive elements as well. This new and unique circuit configuration uses Tri-Phase combining for extra accurate phasing and amplitude stability. This unit uses only two delay lines and provides a form of time delay phasing that provides more than one band coverage with the Hi-Z elements. This unit was optimized for the 160 meter amateur band but can be used from below the broadcast band to over 30MHz. A typical 80 foot square layout of 20 foot tall elements and Hi-Z amplifiers can provide 12dB of Relative Directivity Factor and 30 dB of front to back ratio on 160 meters. Of course the best performance depends on the accuracy of the antenna layout, the accuracy of the connecting and phasing cables, and any interfering nearby structures. The unit requires +13.8 VDC and less than 150 milliamps current. It also requires two wires to switch between the 4 available directions and one for +13.8 V power. More information is available in the technical document accessible on the Hi-Z Antennas (tm) click HERE
Stainless Steel screw power and direction control connections
Type F input and output signal connections
Quality G-10 fiberglass circuit board
Comes with parts layout and schematic information
Internal High level isolation amplifier
8 X 4.5 X 2.5 inch plastic enclosure
Basic unit 4 element controller Assembled and tested.. $150.00ea plus shipping.
unassembled kits not available
