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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UR RST IS ... ... ..9 QSB QSB - hw? BK
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