K7LXC and W0AX performed real world *measurements* of several Tribanders and several Veticals which have been published separately. Check K7LXC's website at www.ChampionRadio.com K7LXC is moderator of the TowerTalk Reflector on www.Contesting.com
Verticals are popular on the Low Bands where they can provide useful lower angle radiation without the height requirements of horizontally polarized antennas to realize those same lower angles. Unfortunately, Low Angles from Vertical Antennas are subject to considerable LOSS below the pseudo Brewster Angle (see ARRL Antenna Book for a complete discussion and graphs). Even Very Good Ground will attenuate vertically polarized High Band signals below 10 degrees. That is why verticals play best when surrounded by Saltwater. For the higher bands (30 through 10 Meters), Horizontally Polarized antennas have a significant advantage over verticals due to the 6 dB ground reflection gain that results even over average ground. IMHO, the BEST Simple High Band Antennas are Horizontally Polarized Dipoles at 40 to 60 ft. One of my favorites is a 20M Dipole fed with ladderline which produces a figure 8 pattern from 10 through 30 Meters. A pair of these at right angles covers most of the DX World when aimed at EA / ZL and JA / S.A. (60 / 240 degrees and 150 / 330 degress). I have worked over 320 countries on each of the WARC bands using only Dipole antennas, specifically the above mentioned 20M dipole and 80M dipoles which operate as current fed Long Wires on the odd harmonics (~3/2 WL on 30M, 5/2 WL on 17M, and 7/2 WL on 12M). Tom N4KG (DXer, Contester, and RF Engineer) On Tue, 21 Jan 2003 "K4WLS" <[EMAIL PROTECTED]> writes: > Hi Folks, > > This OT needs some help. I been building verticals to work DX > for last 44 years, but due to disabilitating medical problems now > unable. The last one I built/installed 10 years ago about shot. > > No tower or yagi or trees in yard, so looks like I going to have > to buy one and get somebody to help me assemble it and install. > > Would like to hear from users on what they think the best performers > are on market today, both the electrically 1/2 wave jobs > (counterpoise, > no radials), and the 1/4 wave ones both trap and linear loaded. > > Please reply on-line here so we can all benefit from what you users > say. Yes, I have been on E.Ham Net, but verticals are like rigs - > everyone > seems to have their own camp and not all comments from DX'ers. > > Would really appreciate your input !! TKS, Larry K4WLS > > > ________________________________________________________________ Sign Up for Juno Platinum Internet Access Today Only $9.95 per month! Visit www.juno.com Subscribe/unsubscribe, feedback, FAQ, problems http://njdxa.org/dx-chat To post a message, DX related items only, [EMAIL PROTECTED] This is the DX-CHAT reflector sponsored by the NJDXA http://njdxa.org
