You might want to consider folding the top over to get rid of the excess
length. I don't think a mild slope will hurt anything, but a fold would be
better, especially if you're planning a phased array.. Even a small amount of
high Q inductance at the base won't kill you if you're only talking about
10-15% shortening... or an L-network to match the wire exactly.
Larry N8LP
----- Original Message -----
From: RICHARD BOYD
To: towertalk reflector
Sent: Thursday, September 16, 2004 10:49 AM
Subject: [TowerTalk] followup question on verticals in trees
Thanks all for the responses on verticals in woods/trees. I haven't read or
responded to them all yet, but plan to.
Meantime, I have a followup question that's occurred to me, another
practical, simple, real world kind of question.
I have some trees in the woods that I am hoping are at least 130' so that I
can put up fullsize 160M verticals without having them slope. If it turns
out they're only 110' or 120', so that I have to have them slope some, how
undesirable is that? How much do you expect the performance will suffer?
What if the trees are only 90' or 100'? (Although I do think the trees are
at least 110'). Note: the tallest trees we have here in Maryland are
"tulip poplars," also called, I think, "tulip trees," that according to the
tree book can get to be 150', and I think I have seen some that big over
near the Severn River (at K3HQ's 30-acre place) -- and I measured the ones
at my old place as 120' (by climbing my 160' tower 'til the treetops were at
eye level and gauging it that way). These trees have a "habit" of being
"columnar," and I have noticed they do this when they are growing amongst
other trees. A tulip poplar growing by itself in the middle of a field
tends to become rounder, not as "columnar" and straight, not as tall. They
aggressively grow tall to get up to the canopy top and get sunlight.
73 - Rich, KE3Q
73 - Rich, KE3Q
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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