Ron's last two posts are talking about free space dipoles.
We are discussing vertical antennas mounted on or near the
ground, which are affected by soil quality. An apples and
oranges argument is going on here!
Phil, K5PC
----- Original Message -----
From: Ron Youvan <ka4inm@gate.net>
To: <towertalk@contesting.com>
Sent: Monday, October 11, 1999 11:12 PM
Subject: Re: [TowerTalk] half wave verticals
>
> K4SB wrote:
>
> > << Try feeding a 1/2 wave element at the top. You've still got to
> > have a ground return, and I'll guarantee you'll never match it. I
> > must be missing something here. This is gibberish. And what
> > ground clutter are you referring to? >>
>
> Ground clutter is from buildings and trees, if the bottom of your 40 meter
> `half wave length vertical' is 40 or 50 ' above the ground, the ground losses
> become minimal, for instance.
>
> > << You seems to be missing the point that in all vertical antennas, a path
> > must
> > exist for ground return, and the lower resistance that path
> > exhibites, the better the antenna will perform. >>
>
> I disagree, All quarter wave antennae require a `counterpoise'
> (horizontally
> or vertically mounted - ground has nothing to do with it) A vertically
> mounted
> center fed dipole needs NO MORE ground or radials than a horizontally mounted
> dipole. An end fed dipole works exactly like a center fed dipole except the
> impedance is ` the opposite'. Very high instead of very low.
>
> If you feed a 18" long radiator (piece of pipe or rod) at one end with a
> matching stub, feed it with a 146 mHz Handy Talkie (50 Ohm) and send it up
> hanging from a balloon, you seem to say it won't radiate. Works fine as frog
> hair.
>
> 73 (= Best Regards) de: Ron ka4inm@qsl.net
> VISIT my HAM WEB SITE at: http://www.qsl.net/ka4inm
> using LINUX here & loving it!
>
>
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>
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