A StackMatch is not intended for this type of installation (K8UR parasitic
array).
This is like saying a hammer has something wrong with it since it needs to
be modified to drive a screw.
73,
Bob W5OV
-----Original Message-----
From: k3bu@optonline.net [mailto:k3bu@optonline.net]
Sent: Thursday, January 31, 2008 6:44 AM
To: CQ-Contest@Contesting.COM
Subject: Re: [CQ-Contest] 4 Square/ Raised Radial Questions
>
> Sounds like something wrong with that box to me. On my 4-square the
> feedpoints are all connected by radials, the feedlines all
> connect to the
> bases and the switchbox just like another radial... and it
> definitely works!
>
>
> Just imagine how it would look if there were LOTS of radials all
> connectedso it approximated a solid metal plane, that is what
> the raw designs are
> compared to, a perfect conducting plane. The currents are
> injected at the
> bases of the verticals with no need for feedlines baluns/chokes
> or anything
> else, the model works just like the real thing... or vice versa.
>
> David Robbins K1TTT
It has to do with configuration of 3 vertical array a StackMatch, using
disconnected element as a parasitic, coax line turning that element into
reflector, but connected shields messing up the current flow.
No problems with classic 4 squares, get patterns OK, but that 3 el was just
plain omnidirectional. If you disconnect the shields, it works fine.
Verified in real life.
73 Yuri, K3BU.us
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