[TowerTalk] Vertical dipoles(K4SAV)

[Stuart Browne]

What do I call a 60' slinky vertical with a 99' top hat and two 60'
radials?  A HWV or an inverted L?

Stu
WH6H/XE1

On Sat, Nov 21, 2009 at 7:56 AM, David J. Sourdis <hk1kxa at hotmail.com>wrote:

>
> Hello,
>
> That antenna can be improved a bit:
> I would lenghten the upper loading and the vertical section to shorten the
> bottom radials and make  'em
> become bottom capacitive loading. Maybe the feed point will shift a little.
>
> You get four things with this:
>
> -Raise the current maxima from 4 meters to about 13 meters high and get a
> higher and bigger Ampere-degrees area.
> It is about 7% more area in this case, and about 13% (half a dB with low or
> no losses) if you add one meter more at the
> bottom of the vertical section to make it 19 m long, starting at three
> meters level at the bottom instead of four meter level.
>
> -Higher Radiation resistance, therefore, efficiency.
>
> -The high voltage ends at the bottom will raise a bit from the ground,
> reducing losses, more efficiency.
>
> -Save space to the sides and some rope from the upper part.
>
> You will have to rename it from "1/8 wavelenght high  vertical with top
> loading and two radials" to "HVD with capacitive end loading"
>
> 73
>
> David
> HK1KXA
> EC5KXA
>
> PS : Is there any common place where we can upload pics or blueprints to
> share and support what is written here?
>
>
>
> > From: 7s7v at tele2.se
> > To: 7s7v at tele2.se;
> > Date: Sat, 21 Nov 2009 09:37:44 +0100
>
> > Try this one instead of EI7BA:
> >
> >
> http://66.196.80.202/babelfish/translate_url_content?.intl=se&lp=ja_en&trurl=http%3a%2f%2fwww003.upp.so-net.ne.jp%2fJH1GVY%2fns-22.html
>
> >
>
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