The 75
meter dipole at K7ZB was put up to meet the need for making contacts
with friends in the Southwest and Southern California. As usual, it had
to be put up so no one can see it from the surrounding neighborhood.
The
objective was accomplished as shown below, which is the site drawing
for the installation. It follows the contour of the home, yard and
landscaping as much as possible - sacrificing gain and pattern for
merely pumping a signal into the clouds and surrounding area.
K7ZB
painted the wire forest green to match the background of the foliage
or desert sand to match the usual house paint used in the majority of
residences in the Valley of the Sun.
It is very hard to see even when you know it's there!
The dipole can be fed directly with coax, or a balun can be used. It can also be fed with twinlead or ladder line. It is important to seal the insulating dowel with epoxy to keep it from rotting. I used the hose clamps to attach the coax to the antenna.
ReplyDeleteThe antenna consists of a regular 40 meter dipole using a 1:1 balun at the feedpoint. Connected to the same feedpoint is the 20 meter element.
ReplyDelete