Here are some photos of past projects:

  Lightning Damage - Point of Entry

  Lightning Damage - 2nd Strike Point

  2 element array - for 40 meters

  K9AY loop - Directional RX antenna NE, SW, SE, NW 

DX Engineering 4 Square

  The above photos are a snapshot of the DX Engineering RX 4 square.  The left and center photos show the switching network and the RX feed line current choke being tested.  The right most picture is one of the active receive antennas.  From the shack the switching is all done through the coax and the only extra wires from the shack to the unit are +/- 12v dc.  Alternatively, I could have fed the entire 4 square with a control cable for power and switching but I chose not to for this application.