Hello Mike,
You would likely get more Topbanders to read and answer your posts if they
didn't look like someone else's quotes. :-)
73, Mike
W0BTU
http://www.w0btu.com/Beverage_antennas.html
On Sun, Aug 5, 2018, 1:27 PM Mikek <amdx@knology.net> wrote:
> On 8/4/2018 5:53 PM, Mikek wrote:
> > A good reference for Beverage antenna length is by W3LPL, Search
> > online for his patterns, F/B info.
> >
> > If a shorter Beverage wire length is used because of space
> > restrictions, a near perfect feed and restive termination can
> > appear as a low VSWR, over a reasonable frequency range.
> > However here in Maine, the ground is typically not close to level
> > in elevation , and with variations in soil conductivity, resonant
> > lengths are beneficial..
> >
> > One of the ways to make a wire look electrically longer is the use of
> > covered wire. (Velocity factor that can vary with type of covering used).
> > Also some have placed small lumped inducatances along the way,,
> > Another used a slinky..
> >
> > Basic understanding about cores that most, excepting mix 33, are
> > inductive, So have a question for anyone who has tried it.
> >
> > Will adding many mix, 43, and 77 spaced cores with a few turns
> > each along the Beverage wire , lower the basic frequency enough to
> > be beneficial?
> >
> >
> **************************************************************************************************************************************************
>
> >
> >
> > I recently added 9 binocular cores (Fairrite # 2873000202) to my
> > 253ft BOG.
> > Before the Cores my velocity factor was .78
> > After installing the cores the VF was .67
> > So, I'm thinking it made my antenna seem to be 16% longer, or went
> > from and apparent 324ft to 377ft.
> > I was shooting for .55 and will add more cores when I get them.
> > Even the the cores are binocular, I only made a single pass through
> > one hole of the core.
> > That equals about 8.9uh.
> > You probably have this URL, it is the only info I can find.
> >> https://www.w8ji.com/slinky_and_loaded_beverages.htm
> >
> > Mike Knowlton
> >
>
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