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Paladin October 17th 06 04:03 PM

ground radials
 
Hello Antenna-Lovers,
I have a "few" antennas on my small lot. I have NOT yet tried
a vertical. I know the need for a GREAT radial system is very
important for success. Does anyone out there know of a device to lay
and set these "wires";off a roll maybe, into the ground ??? Then all
you would have to do is CUT them to the length and attach them. Maybe
a thin wheel 6 inches or so with a grove on the outter edge...........
I don't know. HAS anyone seen anything like this ?? Would it work ?
THOUGHTS ??!!?


Charlie October 17th 06 04:36 PM

ground radials
 
As opposed to actually digging trenches or even slits in the ground for
radials. I chose to lay them on top of the ground and held them in place
with 1 1/2" fence staples. Then I easily covered them with soil from a few
wheelbarrow loads. I chose to do this in the dead of winter ( no snow in
Mississippi) while the grass was brown and very short. Next summer the grass
grew and covered the entire "radial field". I used 72 radials total for my
Hustler 5-BTV.

Photos here
1. http://www.ad5th.com/5-BTV.html

--

73,Charlie-AD5TH
www.ad5th.com


"Paladin" wrote in message
ups.com...
Hello Antenna-Lovers,
I have a "few" antennas on my small lot. I have NOT yet tried
a vertical. I know the need for a GREAT radial system is very
important for success. Does anyone out there know of a device to lay
and set these "wires";off a roll maybe, into the ground ??? Then all
you would have to do is CUT them to the length and attach them. Maybe
a thin wheel 6 inches or so with a grove on the outter edge...........
I don't know. HAS anyone seen anything like this ?? Would it work ?
THOUGHTS ??!!?





Cecil Moore October 17th 06 05:04 PM

ground radials
 
Paladin wrote:
THOUGHTS ??!!?


Elevated radials?
--
73, Cecil http://www.w5dxp.com

Dave Oldridge October 17th 06 06:48 PM

ground radials
 
"Paladin" wrote in news:1161097429.261468.307730
@m7g2000cwm.googlegroups.com:

Hello Antenna-Lovers,
I have a "few" antennas on my small lot. I have NOT yet tried
a vertical. I know the need for a GREAT radial system is very
important for success. Does anyone out there know of a device to lay
and set these "wires";off a roll maybe, into the ground ??? Then all
you would have to do is CUT them to the length and attach them. Maybe
a thin wheel 6 inches or so with a grove on the outter edge...........
I don't know. HAS anyone seen anything like this ?? Would it work ?
THOUGHTS ??!!?


My basic experience has been that it takes about 120 half-wave radials to
make a really GOOD ground. But 16 radials the same length as the antenna's
height will get you within 3 db of that. Want those 3db back? Just put up
a second vertical and steer the pattern!


--
Dave Oldridge+
ICQ 1800667

Dave Oldridge October 17th 06 06:49 PM

ground radials
 
Cecil Moore wrote in news:Ia7Zg.15603$e66.2274
@newssvr13.news.prodigy.com:

Paladin wrote:
THOUGHTS ??!!?


Elevated radials?


That works, too. And it's actually pretty efficient!


--
Dave Oldridge+
ICQ 1800667

Wimpie October 19th 06 06:15 PM

ground radials
 

Paladin ha escrito:

Hello,

You didn't mention the operating frequency. If your plan is to make a
quarter wave antenna, the ground system is very important. Maybe there
is another option. If it is for the higher bands;

Placing the radials above ground does help. If it is a mono band
antenna, try to get a halve wave resonance. That has high impedance, en
therefore introduces low current into the ground system. The
disadvantage is that you have to make a matching network that
transforms 50 ohms to the kOhms range.

If the height is too much, you may add a coil in the middle. This
reduces bandwidth and increases the feed point impedance.


Best regards,

Wim
PA3DJS



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