[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [IRCA] Array Solutions SAL-30
- Subject: Re: [IRCA] Array Solutions SAL-30
- From: Nick Hall-Patch <nhp@xxxxxxxx>
- Date: Tue, 04 Feb 2014 05:35:01 +0000
Mark and Andrew have given good explanations for what you observed
Les, unless you tell us that the whips were placed as far apart as
they recommend.
My problem may be unique to parts of the world (like here) where
there are weak stations from the other side of the ocean in two
quadrants suffering interference from stronger domestics only in the
other two quadrants. That's a great test bed for any unidirectional
system. I've used Wellbrook's ALA100 phased system with 40 meters
separation and suggested size delta loops, and compared it with a
FLG100 /standard Flag, and found that the FLG100 just had more
overseas signal remaining in many cases (and of course a Flag is a
sort of self-phased antenna), and took up less room. Sure were
lovely nulls on the ALA100 phaser though. I'm not sure I'd suggest
larger antennas, maybe more gain would do the trick, maybe even just
a bit more post phaser gain.
I'm hoping to do more work on this at some future point, but I need
to take some time to visit a site with more space. Trying 40m
separation at home ends up on my neighbor's lot, and of course, local
noise is always an issue. (and yes, please "butt in" with any
suggestions Andrew...).
Incidentally, I have tried the ALA100 phaser with smaller ALA100
loops, and with them more closely spaced, and got the impression that
one could do quite well hearing domestics by nulling other domestics
with such a setup, but this location isn't the best test bed for that
sort of DXing.
best wishes,
Nick
At 20:06 03-02-14, you wrote:
Nick,
I'm glad that you addressed this topic. I've experienced a similar
issue when phasing active whips against each other. Deep nulls are
easy enough to obtain, using the Quantum Phaser with 2 LF
Engineering Active Whips, but once nulled, the remaining signal is
so low that identification of stations underneath can prove impossible.
What is the solution to this problem? It sounds like you're saying
that bigger antennas with a greater capture area may be the only
solution? Unfortunately, that's not a great option for my
deed-restricted, HOA situation or my small back yard in general.
Any suggestions welcome. Thank you for sharing your expertise. Very
helpful to a newcomer.
--
73,
Les Rayburn, N1LF
Maylene, AL
EM63
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca
Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers
For more information: http://www.ircaonline.org
To Post a message: irca@xxxxxxxxxxxxxxxx