On Aug 31, 10:00*am, bpnjensen wrote:
On Aug 31, 7:11*am, dave wrote:
RHF wrote:
What is the Best Direction to 'Point' a Sloper Antenna for DX ?
Given an area where you could locate a Sloper Antenna
with a Tall Mounting Pole "Top-End-Feed-Point' and the
ability to move the Bottom-Far-End around the full circle
of 360 Degrees.
Where would you place 'Point' the Bottom-Far-End for the
best DXing ? [ N ? E ? W ? S ? ]& *WHY ?
Top-fed slopers in an open space are essentially omnidirectional. *Most
of the radiation happens at the feed point. The slantwire and the
support structure form a low Q mass that also radiates, equally well in
all directions.
- Dale P. has always recommended using his PAR end-fed as a sloper
with
- the feedpoint near the bottom and thus giving a nice short run to
- ground. *Good omni results and a high radiation angle. *I think this
- would work for me if I did not have such a battery of RFI generators
- around my home.
-
- Bruce
BpnJ,
Now that is very Smart of Dale Par [W4OP]
http://www.eham.net/reviews/detail/3707
{Now... Why Didn't I Think of That !?!}
Plus -if- you run the Coax Cable directly underneath
the Antenna Wire; it would act as a Counterpoise
and a more uniform ground field.
- simplify - simplify - simplify -
Sort of the same approach that Wellbrook in the UK
recommends for a Far-End feed-point for a better
Inverted "L" Antenna.
http://www.wellbrook.uk.com/longwire.html
But that would eliminate the Tall rotational Center-Point
for directional testing : Which is OK since I am only
looking for the best single Direction be it N? E? W? S?
I guess that the SWL Sloper Antenna Designs by
both Alpha Delta and Eavesdropper were built around
using the Side of a House* as the High-Mounting-Point.
* Taking what the Customer already has and building
on that; to make the installation as simple and easy
as possible. {A No Brainer}
While most Amateur {Ham} Sloper Antennas generally
have a Bottom Feed-Point except for those attached
to an existing Tower/Mast.
BpnJ - tyvm for the tip ~ RHF