Yuri, you're not reading the Stackmatch description carefully enough. The
K8UR array is parasitic, and relies on a switchbox that disconnects all
antennas except the one that is driven, and then uses the floating
feedlines as inductive loads to make the undriven antennas appear as
reflectors.
As array solutions says, the stackmatch feeds the connected antennas
in-phase, and their spacing would have to be adjusted to get
directivity. The shields of all the feedlines are connected together
through the case of the stackmatch, and so the K8UR-type behavior cannot be
achieved with it.
73, Pete
At 09:50 PM 1/31/2008, k3bu@optonline.net wrote:
> > A StackMatch is not intended for this type of installation (K8UR <BR>>
> parasiticarray).
> >
> > This is like saying a hammer has something wrong with it since
> > it needs to
> > be modified to drive a screw.
> >
> > 73,
> >
> > Bob W5OV
> >
>
> >From the StackMatch manual:
>
>"StackMatch for Verticals User's Guide
>Thank you for your purchase of a WX0B StackMatch.
>
>Users Guide
>This WX0B StackMatch can be used for stacking two or three monoband
>verticals. It will give the user the ability to feed two or three
>verticals in phase giving a broadside pattern when spaced properly, and a
>end-fire pattern in two or three directions when each antenna is selected
>by itself.
>
>Also Three verticals may be hooked up and used to achieve similar results
>in three directions. The procedure below is for two antennas but also can
>be expanded for three antennas by using the third antenna port. The three
>antennas are set up in a delta pattern or triangular pattern, equidistant
>from each other. "
>
>
>Take your case with Array Solutions, it is still on their web site,
>advertising the StackMatch for use with two or three verticals.
>I believed the claims and wasted day on beach of Cape Hatteras trying to
>make 3 vert array work.
>
>I just wanted to show example when connecting the shields of phasing
>cables could be detrimental to the antenna's health. I apologize for
>apearing so stoooopid :-)
>
>73 and have a nice day!
>
>Yuri, K3BU.us
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