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 <[email protected]> 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 <[email protected]> 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 > ____________________________________________________________ 53 Year Old Mom Looks 33 The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried http://thirdpartyoffers.juno.com/TGL3141/4ec472c21fffd128dfbst02vuc _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
