Since your Hustler vertical is above ground and roof mounted, I would
install at least one individually cut and tuned 1/4 wavelength radial for
each band of operation. Four or more would be better. This advice
especially holds true for the higher bands, like 20, 17, 15, and 10M. On 40
and 75, the height of the antenna above ground is pretty low, so tuned 1/4
wavelength radials aren't as necessary in my book (especially on 75/80M).
Just put down as much wire as you can for decent 40 and 75 meter operation.
I know it's a lot of wire, but if you want it to play well then this is the
route to take. If it was ground mounted (like mine), I wouldn't worry too
much about lengths, and just put down as much copper as possible (especially
near the base of the vert). By the way, several articles have been written
on tuned, above ground, radial systems. Search the internet and magazines,
like QST, for the articles and advice.
73,
Steve Gehring, KZ9G
Bothell, WA
E-mail: kz9g@arrl.net
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of arholub
Sent: Tuesday, September 02, 2003 12:52 PM
To: TowerTalk@contesting.com
Subject: [TowerTalk] radials
Possibly you could help with an ongoing discussion about radials.
I have a roof mounted Hustler 6BTV.
One friend, as well as Hustler, recommends that radials should be cut for
the individual frequencies.
Another friend recommends that only radials cut for the lowest frequency are
needed.
My antenna loads (vswr 1.6) on 30 meters ever though no radial is cut for
that frequency but two are cut for 40 meters. Incidentally, my roof
mounting only allows me to mount radials over 180 degrees since the antenna
is on one corner of the house. I have two radials each cut for 10/15/20/40
meters. Would either of the two recommendations be better or worse for
radiation angle, etc?
Thanks
Doc
WA6OGO
Visit our web site, www.arholub.com, to get the latest news, computer class
information and Orange Coast College marine course information.
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|