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Topband: 60' or 70' spacing on Hi-Z 4/8 element RX array

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Subject: Topband: 60' or 70' spacing on Hi-Z 4/8 element RX array
From: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Wed, 2 Nov 2016 09:29:41 -0400
List-post: <topband@contesting.com">mailto:topband@contesting.com>
I just purchased a HiZ 8 element array ... and am trying to decide which way I 
want to go. I want a bit better performance on 40 than the standard 80’ spacing 
provides (lobes are quite high angled) ... and going down to 70’ improves 40 a 
good bit – going to 60’ even more so (and improves, from an RDF standpoint, 
both 160 and 80!) ... I’ve modeled all conditions. I see the Total power 
however suffers a good bit when going down in size due to lost ‘aperture’ 
effect ... on 160 meters going from 80/20 (height of vertical) down to 70’/20 
is a –3db loss in total power ... going to a 60’/20 is –6.6db. Lee assures me 
that this won’t have any real effect here unless my ... if I understand him 
correctly, local noise is very low – which it isn’t it turns out ... and I was 
wondering how others using smaller spacing, either 60’ or 70’, like the overall 
performance on 160 especially as well as 80? 

thanks for your time,

Gary 
K9RX

[this is not to second guess Lee, this is rather just a ‘comfort’ request ... I 
am still at a bit of a loss when he says it will be a loss of –6.6db going from 
80 to 60 foot and yet I won’t notice the difference! Not sure what the real 
world implications of that are in the headphones. This will be using their new 
Plus6 preamps]
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