Hi Gary
We plan to set up ours with 60' spacing for best 40m performance, and with just
10' elements.. When it is done we will be able to compare the performance on 80
and 160 with our monoband 8 circles. I agree that power gain is not important,
particularly in our high QRN environment. AFAIK 70' spacing is not an option
however I could be wrong. We hope to have it done before the CW test because we
lost our 80m 8 circle relay box due to water damage and a replacement won't be
ready in time so we should have some info for you soon...73 Bob HS0ZIA
Sent from Yahoo Mail on Android
On Wed, Nov 2, 2016 at 17:29, StellarCAT<rxdesign@ssvecnet.com> wrote: 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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