[Hi-zreceivingarraydiscussions] Obsevations

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Hi Thorton,

I waited to see if anyone else would chime in.  I have the original 
prototype 4-8 s/n 001.  The only difference would be that mine gets used 
for testing and evaluating new stuff, for example the Hi-Z Amp PLUS6s. 
Right now I have one group of 4 elements with the standard Hi-Z Amps and 
the the 4 element with the PLUS6 prototype amps s/n 001,002,003 AND 004 
HI HI..

I have noted similar response. My Hi-Z 4 too exhibited less performance 
early in the season and as the season grew the pattern would improve. 
Why? Hum, ground characteristics, maybe, could be the condition of the 
band(s), but every year it always stabilizes. btw: I have seen similar 
results over at Lees, the eastern test range.

We tested the Hi-Z 4-8PRO against the Hi-Z 8 on 160 and as expected, 
there were two differences. One was the 8 could hear a little better, 
but then it has about 1.2-1.5 better RDF response. The directional 
patterns of the big 8 is more crisp and very sharp.

One other observation when VP8ORK was on, was listening night after 
night on 80 meters with the staggered Hi-Z Amps and PLUS6s. What was 
interesting was that the true AZ was between 2 directions. On the 
direction with the Hi-Z AMP standard the SNR was several s-units. When I 
switched and was on the heading where the PLUS6 was used, the noise 
floor was virtually unchanged and the SNR jumped up as predicted just 
about one full s-unit.

My recommendation is watch how it performs as the season proceeds.

Cheers / 73  Dick  KO7N

On 10/20/2011 9:34 AM, thornton ash wrote:
> I installed an 8 element system late last spring and had limited time to use it before it all had to come down for the XYLs gardening season. The testing at that time was inconclusive on 80&  40 compared to my full size 80M and 40M 4-Squares. This system was built on an 84' diameter.
>
> I put the system back up this September and until late September, again the results were inconclusive. I was not particularly worried as after 20 plus years I am use to the 4-Squares underperforming until later in the fall when the angle lowers. As the fall progresses I am seeing significant improvement in the front-to-back and front-to-side discrimination. Now that we are in mid October I am starting to see improvement in readability on the long haul 80 and 40 DX stations compared to the 4-Squares. So far it is not always the case, for example, it was apparent yesterday with the 3XY1D on 40 and this morning on 80 with the TX7M.
>
> I would be interested in anyone else's observations.
>
> 73,
>
> Thorny
> W1FQ
>
>
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