[Hi-zreceivingarraydiscussions] verticals supports

[contact at hizantennas.com]

Phil
The mount capacitance should be kept down to 10pf to 20 pf max.  With small
diameter elements your source capacitance will be even smaller so you need
to strive for a very small mount capacitance. This can be measured with a
hand held C meter or other means.
  Your system capacitance depends on how much overlap there is between wire
element and ground post.
  Off the top of my head I would say you are going to lose quite a bit of
signal if there is more than a few inches of overlap.
 By the way Phil, please subscribe or resubscribe to the Hi-Z  reflector. I
manually let this one through

 Lee   K7TJR

-----Original Message-----
From: Hi-zreceivingarraydiscussions
[mailto:hi-zreceivingarraydiscussions-bounces at hizantennas.com] On Behalf Of
Phil Duff
Sent: Saturday, December 20, 2014 8:26 PM
To: Hi-Z Receiving Array Discussions
Subject: Re: [Hi-zreceivingarraydiscussions] verticals supports

On Dec 21, 2014, at 3:49 AM, Dave Anderson <davek4sv at yahoo.com> wrote:

>   Make sure the Antenna insulator between the mounting method allows for
good low capacitance high mounting strength for the Antenna. 


What amount of "C" is considered "low capacitance" for the antennas mounts?
How much is too much?  How do we measure it?  With one of the commonly
available antenna analyzer's capacitance mode?  What frequency?

I'm curious because I recently changed my Hi-Z 3 el triangle array's
elements and mounts.  Originally used fence T-posts with offset PVC mounts
for steel electrical conduit elements and ground rod for each element.
Replaced those with #14 ga aluminum fence wire elements inside telescoping
fiberglass poles with grey PVC bushings clamped to angle-iron driven into
the found and separate ground rod.

Have not noticed any obvious difference in the array's output to receiver or
in performance.

de Phil NA4M

-. .- ..- --
Phil Duff          na4m[at]suddenlink.net










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