Topband: An oddball question about a BOG.

[Chuck Dietz]

And, by the way, K5GN and W5KU report that their Beverage above a barbed
wire fence is the BEST Beverage at their place.

Chuck W5PR

On Sat, Aug 24, 2019 at 12:41 PM Chuck Dietz <w5prchuck at gmail.com> wrote:

> 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 <mikewate at 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 <amdx at 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
>> >
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>