The far end is high impedance voltage, and has minimum horizontal current radiation. The inverted L is a good trade off signal vs available height. Not an expensive antenna to build.
73 Bruce-k1fz On Sun, 18 Nov 2018 12:31:38 -0700, Wes Stewart wrote: That also drives up the current in the horizontal wire with attendant increased horizontal radiation. I chose for a couple of reason to do the opposite; shorten the wire to make the feedpoint capacitive and use a shunt inductor to get a 50-ohm match. This really doesn't improve the 2:1 VSWR, that I consider acceptable, however. Wes N7WS On 11/18/2018 8:55 AM, F Z_Bruce wrote: > That sounds about right. As you put a good ground system under it, that value will come down, and the efficiency will come up. > > Many add extra antenna wire that pushes the current up the wire, this also raises the impedance, hopefully to near 50 ohms with the right length. > A capacitor (variable, then fixed) in series at the feed point can cancel the added inductance. > > 73 > Bruce-k1fz > https://www.qsl.net/k1fz/beverage_antenna.html > > > On Sun, 18 Nov 2018 10:41:36 -0500, WW3S wrote: > > What should the Z be for a 1/4 wave inv l, with the radials attached to a radial plate? Mine seems to be 60 ohms or so.... > > Sent from my iPad > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
