Hi Bob,
I can't add much in the way of technical reasons for adding
the radials vs a c-poise. However, I can say that my Inv. L, with
a four wire quarter wave c-poise has worked quite well...and
with much less work than all the radials you are considering.
I use only 100 watts and have worked into the Carib. and the
recent K9W operation. I also have been using a HB QRP xmtr from
1924 and have worked from C6 up into VE2/VE3.
I would wonder about the possibility of 'under-the-house' radials
putting rf into your house wiring, and if using your xmit antenna
for rcving, picking up trash from your in-house gadgets...tv, computer
etc, esp if you are running power. You may be able to get someone
to model the two systems and the results might help you make up
your mind.
Good luck with what ever method you end up with...73 de Bill K4JYS (NC)
----- Original Message -----
From: "Robert L Chortek" <Robert.Chortek@berliner.com>
To: topband@contesting.com
Sent: Monday, January 6, 2014 2:51:50 PM
Subject: Topband: Radial Question
Hello Fellow Topbanders -
We are about to embark on a front yard landscaping project at our home on a
tiny 12, 500 sq. ft. lot.
It occurred to me this would be an excellent opportunity to put down a large
number of buried ground radials BUT, they would only cover about 90 degrees of
the compass. Then it also occurred to me I could put down a large number of
radials in our crawl space under the house.
So, my question is, what is the likely negative impact, if any, from the house
being between the 160 meter vertical and the radials placed under the house? I
assume the house material, most of which is wood, tile, sheetrock, etc. (with
the usual house wiring) would be invisible to RF and have minimal impact.
If I could put down say 60 radials ranging in length from 40 to 120 feet long,
would it outperform my current system with 8 resonant elevated radials 10 -15
feet high (which cover only about 120 degrees of the compass)? I'm incline to
proceed IF it would provide a meaningful improvement in my transmitted signal
strength.
Thanks for any help!
73,
Bob/AA6VB
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|