Particularly for the very minimal radial systems some are forced to live with, not having high angle radiation may actually be a considerable advantage.
If one does not have "dense" and uniform radials the ground field cancellation advantage of radials is lost, and having a low current center on the vertical section now is a lossy issue. The max would be right at the grass or at the base of elevated radials, basically as low as you can get. Since for many this ground cancellation advantage cannot be had on their property, the next best thing is to get as much current center as far UP on the vertical wire as is possible. My current center is between 70 and 90 feet up on the wire and the horizontal is 105 feet. My driveway bisecting the area under the only plausible wire location would not have allowed a "T," but reflection on the issues says I'm better off with the L. Given how lossy some grounds can be, and with less than dense and uniform radials, for a given installation a "short" T may simply be *throwing away* the energy not radiated at horizontal angles. Remember that the horizontally polarized radiation is not subject to the horrendous ground losses of vertical polarization. With vertical antennas on 160, the five ton elephant in the room is what one is doing about ground losses. Everything else is yippy puppies. Unless one has an excellent radial system, reducing ground losses is about the only significant question. 73, Guy. On Fri, Oct 14, 2011 at 8:55 PM, ZR <[email protected]> wrote: > > ----- Original Message ----- > From: "ZR" <[email protected]> > To: "Jim Bennett" <[email protected]>; <[email protected]> > Sent: Friday, October 14, 2011 8:49 AM > Subject: Re: Topband: Fwd: Capacitor for Inverted L > > > I dont understand the sudden urge or desire of some to suppress all high > angle radiation > from an inverted L. It is well established that even a low horizontal > dipole > can work amazing amounts of DX on 160 when conditions allow and having both > possibilities present in the L is a benefit. > > Carl > KM1H > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
