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Receive 4 Square Control Unit and Phase Switch Unit
The Control Unit is used to switch your Receive 4 Square Array in as many as 8 directions for the 160 meter band. The Phase Switch Unit is at the antenna site and is remotely controlled by the Control Unit. The Phase Switch Unit chooses different delay lines (coax cables) which determine the arrays received direction.
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How to Build a Receive 4 Square Array
The manuals provide a very detailed description with pictures and drawings on how to build your own 160 meter 4 square receive antenna.
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