I agree with Herb. Also Haiti is on an earthquake fault. The quarter
wave tower would have a better chance of survival and is safer.
73
Bruce-K1FZ
----- Original Message -----
From: "Herb Schoenbohm" <herbs@vitelcom.net>
To: <topband@contesting.com>
Sent: Tuesday, February 25, 2014 5:53 PM
Subject: Re: Topband: AM broadcast tower and 160m dxpedition
Half wave verticals have been very disappointing to me over the years when
I had the tall BC towers in my backyard to play with after midnight on
160. I have had much better result in hanging 1/2 wave center fed slopers
of of high towers. Radio stations seem to prefer if they have extermely
high towers like KSTP in St. Paul to split them with an insulated section
and feed them as a Franklin design and pick up some additional gain along
the ground. Some designs do not required two stacked half waves but
achieve significant height by folding back the top and bottom sections
with a cage or in fact using a top hat and an equivalent on the bottom.
The proper phasing section is mounted in a box at the center split and the
feedline is inside the tower. Why this should work any better than a
straight 1/2 wave, as it seems to is available perhaps in those who can
model and compare the two. It seems however that topbanders who expect
good results with a bottom fed 1/2 over a traditional 1/4 wave over a good
ground, seem to come away disappointed like myself.
Herb Schoenbohm, KV4FZ
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