Re: [IRCA] Comments on Wellbrook Array

["Guy Atkins" <dx@xxxxxxxxxxxxx>]

Hi Walt,

The last time John and I were at Grayland with our 2-loop prototype
Wellbrook Arrays, we were getting 35-40db nulls from the Portland stations,
which were closest to being in the null of the rear beam of the NW array.
This of course is far better than we've had off the back side of Beverages
at Grayland.

I've heard that Andy has indeed sold  one or more 4-loop, production
Wellbrook arrays, so he's up and running. It's an expensive product,
though... $700+ I believe, and the buyer needs to supply equal length coax
runs to all four loops.

Guy Atkins
Puyallup, WA USA
www.perseus-sdr.blogspot.com



------------------------------

Message: 6
Date: Fri, 29 Aug 2008 16:16:24 -0700
From: WALTER SALMANIW <salmaniw@xxxxxxx>
Subject: Re: [IRCA] TPs Aug 29 from Orcas Island

I had a question a week ago from someone asking about the array.? Basically,
it?s a prototype phasing unit
using 2 delta loops in a vertical plane, 40 meters apart.? Using the phaser
box, one is able to phase
out signals from one direction or 180 degrees.?
In my case, mine is oriented about 315 degrees towards Asia.? I had noted
that I wasn?t getting any null to
the south.? Re-reading the instructions,
Andy Ilkin advises that one switches the wiring on one of the loops.? Sure
enough, this solved the problem,
although I haven?t yet achieved nulls up to 50 dB as Andy claims.? Still,
even 10 to 20 dB is great.? I don?t think Andy has yet achieved
production status, but one should check the Wellbrook website in the UK.?

_______________________________________________
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