[30m] Re: 30M Stealth Antenna
Gary Tuck
gtuck at mac.com
Sun Jun 18 16:08:13 EDT 2006
Just joined the list after seeing a link to the archives. Thought
I'd throw an idea in on stealth antennas. We moved to antenna
restricted neighborhood over 15 years ago. We were having the house
built and I installed a 40m loop in the attic after the electrical
inspection and before the sheet rock went up. It is 20'x40' and fed
in the center of one of the short legs with ladder line and then to a
4:1 current balun and then tuner. It worked reasonably well on all
bands 40 and above. Being concerned about the RF I added an antenna
outdoors. This too was a 40m loop but in a delta configuration with
the apex at about 20ft and fed in the corner with a 4:1 current balun
and coax to the shack. It performed on par with the indoor attic
loop. The wire was #16 copperweld and was nearly invisible to
neighbors.
Finally, I installed a 80m sloping delta loop. The apex is up 50' in
a fir tree. The base of the loop is no more than five feet above the
ground running along a cedar fence. It is fed like the old 40m
delta. The loop is sloping about 45 degrees from vertical. When
condx are reasonable I can work a lot of DX. Worked both VK9X and
VK9C with 100w on 30m. You really have to look for the wire to see
it unless we've had freezing rain and it is covered with ice. Lost
it once to squirrels who liked to chew thru the kevlar line I use to
hoist it up the tree. It is the best I can do in a small city lot
with CCandR's which outlaw all outside antennas. Not a single
comment from a neighbor. Of course I don't turn on the linear amp
unless I absolutely have to and don't operate during the Super Bowl etc.
Sure hope we see more action on 30m.
73, Gary W7TEA
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