[Hi-zreceivingarraydiscussions] Hi-zreceivingarraydiscussions Digest, Vol 12, Issue 2

[Andrew Cowan]

Lee,  Just back from hols with the kids.

I have upped the voltage from the shack and it did reduce the imd when 
on 160m last night.
I measured the voltage at the pre amps at the base of the verticals and 
they read a bit low what would be the voltage range seen at them?
When you confirm the voltages I can set up the system to read 14.5 at 
the controller and make improvements if necessary at the base pre amps.
Thanks for the info, the system has highlighted a fault with my 40m 4 
square which I need to fix it has no gain the NW as the rx system beats 
it, you can't have enough ants..
I can capture a picture of the products on my SDR to show you when I get 
things tuned up and then reduce the voltage to show it if you want?


Andrew   GM0UDL


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Message: 1
Date: Tue, 27 Sep 2011 09:52:19 -0700
From: "Lee K7TJR"<k7tjr at msn.com>
To:<Hi-zreceivingarraydiscussions at hizantennas.com>
Subject: [Hi-zreceivingarraydiscussions] Filter needed for sure
Message-ID:<COL102-DS25F540D40D36D59DDF8F99F5F00 at phx.gbl>
Content-Type: text/plain;	charset="iso-8859-1"

   Whenever there are IMD problems in a Hi-Z array, one should first make sure there is adequate supply voltage at the controller. The IMD capability is directly related to the Voltage available. We can run as high as 14.5 VDC at the controller. If the level drops below 13.8 VDC The capability is compromised. Also if any foilage or insects breach the insulators on the Hi-Z elements the system can be compromised, It took quite a while for one of our customers to find the expired spider.
Lee  K7TJR

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