I seem to remember someone saying the modelling programs are unreliable when a wire is close to the ground. Also, there is really no way to model the properties of "ground." It can vary in just a few feet and the moisture content varies from day to day. I think this is a "try it" kind of antenna. Read other's reported results.
Chuck W5PR On Sat, Aug 24, 2019 at 12:29 PM Mike Waters <mikew...@gmail.com> wrote: > The only way to predict the RDF and pattern is by modeling it. I don't know > of anyone who has done this. I have a few of my .ez Beverage models in > w0btu.com/files/ as a starting point, but I don't think that I uploaded > everything there. > > There are free antenna modeling programs out there. I have only ever used > EZNEC. Maybe someone can suggest something. > > 73, Mike > www.w0btu.com > > On Sat, Aug 24, 2019, 12:05 PM Mikek <a...@knology.net> wrote: > > > > But what did you mean by "proper pattern"? > > > > I should have said, the best pattern that adjusting the Inductive loads > > will provide. > > > > Yes, I understand the pattern changes with frequency. What I want to do > is > > inductively load the antenna, so it will have the same pattern as if we > > increased the length. > > > > Say I have a BOG with a length that is ideal to give me the best RDF > > number available at say 1.8Mhz. > > Now, I move down to 1MHz, and I inductively load it, can I get that > same > > RDF number? > > ie. can I reduce the VF to make it act like the correct length? > > What are the caveats? > > > > Thanks, Mikek > > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector