I have added a 17/20m dipole to the arsenal here.  You can see the 17mtr part as the heavy wire coming from the center insulator.  I used wire that was already on there from KH6 operation.  The 20m is the usually THIN non-insulated wire I get from Radio Shack.  You can barely see one side extending from the center horizontally to the left.

This photo shows the original antennas.  The vertical is a 40-10m R8.  The center insulator at the corner of the roof is a dipole with elements cut for 5mHz (US Coast Guard) and is fed with parallel 75-ohm coax. I can tune it 3.2 – 30mHz with a Johnson matchbox. 

While in a restricted sub-division, there are a few ham antennas around.  If not for the R8, no one would see the other antennas.