[Hi-zreceivingarraydiscussions] Element lengths

[John Harden, D.M.D.]

I am now using the Hi-Z 4-8 PRO and the Waller FLAG (at 95 ft) in diversity receive mode with my K-3. On the left speaker is the FLAG, and on the right speaker is the Hi-Z 8. I hear better now than I have ever heard. I have tower Detuning on RX, and I also break the Omega match on RX using a vacuum relay. 

The results is amazing. 

73,

John, W4NU

Sent from my iPhone

> On Feb 8, 2017, at 3:39 PM, <contact at hizantennas.com> <contact at hizantennas.com> wrote:
> 
> Recently some exchange on the 160 reflector I missed for some reason.
> 
> Here is a recent interchange.
> 
> Hi Lee, couple of questions.  I recently heard some guys with the H-Z
> talking about taking them up to 36 ft vertical.  I know we just went through
> modifying them to get the capacitance down.  With the taller vertical that
> brings the capacitance back up.  Any validity to doing something like this?
> 
> 
> 
> Also have friends with the 4-8 Pro and wonder if it gives better performance
> ie F/B over more bands ie 160-40?  or 160-80..  I know my 200 ft dia 8
> circle's F/B is mainly on 160 and not much on 80.  I think I saw the 8
> circle had a little better RDR but I guess maybe on one band only.
> 
> 
> 
> 73 Mike K4PI
> 
> 
> 
> 
> 
> And my reply
> 
> Hi Mike,
> 
>    I don't really recommend making the verticals longer because it makes
> the array more sensitive to Broadcast intermod. Usually the 4-8 Pro,
> 4-square , and any of the smaller antennas have plenty of signal. The single
> band 8 circles are a bit short on gain in some circumstances in early
> morning quiet hours. It very interesting your mention of this now. I am
> working on a small set of amps to use on each element with the 8A arrays
> only that will add 9 dB of gain with lots of IMD handling and gain/phase
> accuracy. Noise figure of the array is improved by nearly 9 dB.If this
> interests you to get a better noise figure on your array keep in touch and
> ping me to see where we are. I have one set ready and going to a test
> station tomorrow.
> 
>  For your friends with the 4-8 Pro, the way to improve on 40 meter
> performance is to take the array down to the ~85 diameter foot dimension and
> ask me for some new and improved delay cables for the smaller dimension
> only. Scarcely anything is lost on 160 doing this mod. And 40 performance is
> nearly the same as 160 and 80.
> 
> I should post this to the Hi-Z reflector I suppose. Hmmm
> 
> Thanks for the inquiry Mike,
> 
> 
> 
> Regards All,
> 
> Lee
> 
> 
> 
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