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Re: [TowerTalk] Comparing Hi-Z Receive Arrays and KB7GF Shared Apex Loop

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Comparing Hi-Z Receive Arrays and KB7GF Shared Apex Loop
From: Rik van Riel <riel@surriel.com>
Date: Tue, 13 Aug 2013 11:49:59 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 08/13/2013 10:31 AM, Dan Schaaf wrote:
The HiZ clearly outperforms the K9AY loop and coax mag loop. Probably
will also outperform the SAL. The HiZ 4 square and 4-8 Pro  is a phased
array and so removes noise from 3 of the 4 directions and occupies
approx 80 x 80 feet.. The HiZ 8 circle array removes noise from 7 of 8
directions. But requires a much larger piece of real estate. Removing
the noise makes the signal of interest audible.

The SAL is an array of 2 cross-fed magnetic loops, which ends up
attenuating power from both sides (like magnetic loops do), and
from the rear (achieved by cross-feeding them).

It has 4 loops, so the 2 cross-fed magnetic loops can be in 8
different directions, using either 2x single loop, or 2x two
loops in series, cross-fed.

I do not know how the RDF of the SAL compares with the HiZ,
though.  I expect both will beat the K9AY's cardioid pattern.

--
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