My 1988 CQ 160 top USA winner was a 90' shunt fed tower with a 10-20M stack
of 4 el on top. It also accounted for over 200 countries in about 3 years.
This was on a 1 acre lot and some of the Beverage feedlines were over 1000'
long going into the woods out behind the development. Also friendly
neighbors who allowed me to run the feeds.
The ground was all sand and rock and the only thing that really worked was a
mat of galvanized and plastic dipped rabbit fencing extending 50' from the
base with about 60 random length radials out to 130' under it. With just the
radials performance was only fair.
Carl
KM1H
----- Original Message -----
From: <w7dra@juno.com>
To: <olinger@bellsouth.net>
Cc: <topband@contesting.com>; <w0uce@nc.rr.com>
Sent: Wednesday, November 16, 2011 9:33 PM
Subject: Re: Topband: Another non-traditional antenna working.
> not forgetting my 2010 CQWW 160 award (counter poise + 120 up 130 over)
>
> mike w7dra
>
>
> On Wed, 16 Nov 2011 17:51:36 -0500 Guy Olinger K2AV
> <olinger@bellsouth.net> writes:
>> This antenna started out as a "U", but in trimming it back to
>> resonance (folded counterpoise plus isolation transformer plus
>> antenna
>> length), the down part of the "U"s up, over and down got nearly
>> eliminated. There are four other stations using these who do not
>> wish
>> to be identified, who have used the counterpoise for significant
>> improvements, but to my knowledge have not put up the antenna with
>> all
>> the recent "refinements for cause".
>>
>> On Wed, Nov 16, 2011 at 8:40 AM, W0UCE <w0uce@nc.rr.com> wrote:
>> > Top Banders:
>> >
>> > Further to Guy's report, N3ND's Inverted U Antenna is the third
>> operational
>> > Top Band Antenna employing K2AV's Folded Counterpoise(FCP)versus
>> raised or
>> > buried radials. The other two are Inverted Ls with FCPs at K2AV
>> and W0UCE.
>> >
>> > After downsizing to a small QTH with limited space for a Top Band
>> antenna I
>> > expected my Top Band days were over. Not the case... My inverted
>> L vertical
>> > section is only 46.5' but results have been good to include
>> working JA, ZL
>> > and VK. The same antenna is used on 80 meters with ten 25' buried
>> copper
>> > radials and a matching network designed by Guy. Switching bands
>> is
>> > accomplished using a vacuum relay at the feed point.
>> >
>> > Jack W0UCE
>> >
>> >
>> >
>> >> We are testing N3ND's new 160 antenna tonight (Monday local time)
>> 1818
>> >> @ 0005Z. This is another antenna based on RBN validated
>> untraditional
>> >> design. 73, Guy.
>> >
>> > To see the RBN, go to http://reversebeacon.net/srch.php
>> >
>> > Type in N3ND, hit enter. Look for the 160m spots around 03z 15
>> Nov. The 03z
>> > spots are at 400 watts. The 00z spots were at 100 watts, before
>> the band
>> > was really open to the SE. RBN's from two other stations in the
>> area were
>> > down by similar measure at 00z and up at 03z.
>> >
>> > This is an up 70, over 60, down 5 wire fed via a feedline
>> isolation
>> > transformer against a 5/16 wave single wire folded counterpoise at
>> 8 feet.
>> > No radials.
>> >
>> > There is no way his small lot property could support a dense
>> radial field,
>> > either buried or elevated. Therefore, presuming that undense
>> irregular
>> > radials that would fit would be excessively lossy, per RBN data
>> previously
>> > gathered, the +33, -33 foot linear folded counterpoise
>> > (FCP) is used instead, elevated at 8 feet. The folds in the
>> counterpoise
>> > are designed to self-cancel fields as much as possible, thereby
>> minimizing
>> > ground induction, which is loss to skywave. The 66 foot straight
>> line (more
>> > or less, not critical) FCP footprint is much easier to place on
>> property
>> > than some miscellaneous attempt at a broadcast standard radial
>> field.
>> >
>> > 73, Guy.
>> > _______________________________________________
>> > UR RST IS ... ... ..9 QSB QSB - hw? BK
>> >
>> >
>> _______________________________________________
>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>
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