Thank you all for the replies regarding the "T" versus "L" rebuild for my 160
antenna. I'm on a 120x120' city lot in Fairbanks. For fun look me up in QRZ,
under 'Detail' zoom in for a satellite view via Google, then switch to a street
view to see the trees. The motorhome is gone, the motorcycle is replaced with
another, and the tower and trees still stand.
The T would be strung between two spruce trees to the W of the home. Not the
best scenario as the available tree spacing is a close ~75', the T wires would
be touching the top of each tree trunk, and any excess for trim would drop down
next to each trunk as well. A breeze would flex the trees and cause the
vertical portion to rise and fall possibly affecting tuning.
The L (mimicking my former 160 antenna that came down with a blown tree) would
climb a 75-80' tree adjacent to the SW corner of the home, be held away 5-7'
from the trunk via branches except for the very top, and the remaining ~55'
horizontal portion would head towards the street to the south but not reach the
support, again at 75-80'. Eight tuned radials at ~15' are strewn where possible
around the property.
After some thought and your discussion, I think I'll repeat the L as it's easy
to shoot the support ropes from the house roof. The T would be harder, and one
end would be close to the power line that adjoins the north edge of the
property.
Adjusting resonance for the T would require lowering the whole deal a few times
from both supports. Adjusting the L is simpler and only requires loosening the
horizontal leg and shortening or lengthening the base of the vertical part.
Plus I already have a big feed line choke and 3:1 matching unit built from the
previous setup.
We'll see what happens,
73, Gary NL7Y
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Topband Reflector
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