In cave radio experiments we find that one x metre rod can be replaced by x
one metre rods spaced by 2x or more metres.
See also The LF Experimenter's Handbook, Appendix 1 (particularly figure 11)
73 de
John Rabson G3PAI
----- Original Message -----
From: Martin M5CIX <[email protected]>
To: <[email protected]>
Sent: Sunday, January 28, 2001 6:36 PM
Subject: LF: Earthing
Well the RX loop is functioning and the TX is almost there so the issue of
antennas is coming to the forefront of my mind. In particular is the
earthling arrangements for which I would like advice. It is anticipated
that the antenna will be a loaded vertical of around 8 to 10 meters with a
top T one leg about 3 meters west the other 5 meters east.constructed out
of
2.5 mm copper.
As the ground is very wet at the moment it is a good time to bang in some
earth rods. Here (Pangbourne) if you dig down through sandy soil for
about
2 meters you come to gravel and then chalk. The water table in summer is
at
least 2 meters down and the soil becomes very dry. The garden is about 7
meters wide.
Any ideas on how to archive an good earth relevant to the efficiency of
the
aerial. Have contemplated driving copper pipe down at the corners and
considered driving them at an angle of 30 degrees under neighbours
gardens.
Could lay radials just under surface but in the summer they will be in
very
dry earth.
Ideas please
Martin M5CIX
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