[UK-CONTEST] Beverage antenna questions.

[Mark Marsden]

Hi Alex

A parallel fence wire is interesting, unterminated it might not have
much effect, but do model it to see.

On sloping ground keep the Beverage parallel to the ground. To model it
in Eznec make the wire a constant height and look at the radiation
pattern at the elevation relative to ground that is your true horizon.


If you want stellar performance try phased beverages, like this one used
in 160m CQWW
http://granta.digital-crocus.com/Contests/CQ06160/02_L.JPG

In comapring Beverages with Flags, K9AY, and loops, the Beverage comes
out on top.

73, Mark G4AXX



-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of Alex GM3ZBE
Sent: 26 April 2006 20:16
To: uk-contest at contesting.com
Subject: [UK-CONTEST] Beverage antenna questions.

Hi
Many contesters are also Lowband DX'ers so I feel this may be a good
place to find people with the relevant experience to provide some
answers.

I am considering some receive only antennas for 80/160M.  I have a 1
acre plot which is roughly square.  This translates to about 200ft
square.  I may be able to run a beveridge outside my property into some
rough ground such that I could manage a 1.5 to 2 wavelength beveridge on
80M.

It would be convenient to use the existing boundary fence posts to
support some 10ft canes and run the beveridge along the fence line.  The
fence wire would of course run parallel to the beveridge wire and about
6ft underneath it.  The fence wire is nominally "floating" i.e. not
deliberately earthed.
Question 1 - Would this wreck the beveridge performance?

Question 2 - My plot slopes downward quite a bit from North to South,
should I keep the beveridge wire parallel to the ground or should I keep
it horizontal?

Question 3 - Is there any meaningful way I can model a beveridge on a
sloping site (using Eznec).

Question 4 - For domestic reasons I don't want to run a beveridge
diagonally from corner to corner, this means I could only manage
0,90,180,270 degrees as the alignment directions.  I have a feeling that
is not the best directions -any comments?

If beveridges are not practical has anyone any other suggestions? What
about EWE antennas, do they really work?  I tried one when I was in
Coventry and can't say it was ever any better than my 80M dipole for DX.

Apologies if this is seen as off-topic.

Alex


GM3ZBE ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Member of: DeMontfort University A.R.S, RSGB, ARRL, CDXC, GMDX group,
G-QRP, RAOTA.
Cushcraft MA5B review at
http://www.sonikblue.co.uk/g3zbe/Ma5b.htm
Alex Allan (O.D. & E.C.)

Remember....It's just a hobby!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.4.5/322 - Release Date:
22/04/2006