Keith Dutson wrote:
>> you've just made a dandy directive antenna pointing straight up.
>
> LOL! What a hoot that would be. Of course, as you stated, you
> would have no ground loss, so it could get interesting seeing
> how much off-center power makes the trip to a DX station.
This is a really valid design, though, if what you want is to cover the local
area pretty thoroughly on a low-frequency band like 40 or 75. No skip zone! It
would be great for regional nets that cover maybe a radius of 250 miles or so.
I think there's a name for this kind of antenna concept, but I can't think of it
at the moment. Somebody else will...
Bill / W5WVO
Albuquerque, NM
>
> Keith
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Lux
> Sent: Friday, July 02, 2004 6:53 PM
> To: Nat Heatwole; towertalk@contesting.com
> Subject: Re: [TowerTalk] Radials and Non-Vertical Antennas
>
> In the limit, it would be like improving the conductivity of the
> ground
> underneath the antenna to the point where it's over a perfectly
> conducting
> surface. Whether this is good or bad kind of depends on the antenna.
> If
> your horizontal dipole happened to be 1/4 wavelength above the ground,
> you've just made a dandy directive antenna pointing straight up.
>
> Hmmm. it might be that even though you'd probably tend to move the
> directive
> pattern higher in the sky (assuming a lowish antenna), you might
> actually
> come out ahead, because of the lower ground losses.
>
> ----- Original Message -----
> From: "Nat Heatwole" <nat@ajheatwole.com>
> To: <towertalk@contesting.com>
> Sent: Friday, July 02, 2004 3:52 PM
> Subject: [TowerTalk] Radials and Non-Vertical Antennas
>
>
>> I've heard that it often helps the performance of slopers, "Cloud
>> Warmer" dipoles, and low Yagis if one puts radials under the tower
>> (or whatever they happen to be mounted on). Is this actually true,
>> and if so, how much can this improve the performance of the
>> antennas? Also,
>> is there any "science" to putting down such radials, or is it
>> basically just "lay them down somewhere"? And finally, should they be
>> electrically connected to anything, or just physically strung around
>> the
> tower?
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
> "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041
> with any
> questions and ask for Sherman, W2FLA.
>
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> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
> "Wireless Weather Stations", and lot's more. Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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