[Antennaware] 40m array
n4zr at contesting.com
Wed Feb 18 07:47:01 EST 2009
Guys, this reflector is intended for antenna modelers, not antenna
builders. You're much more likely to get good response from the group on
towertalk at contesting.com which, despite its name, is for towers, antennas,
feed systems, connectors, coax, tuners, anything to do with actual amateur
radio antennas. Towertalk has been going for at least a decade, and the
archive is searchable by keywords, making it unnecessary in many cases to
reinvent the wheel.
73, Pete N4ZR
At 08:24 PM 2/17/2009, aa4nn wrote:
>I meant to add that I experimented with 4 sloping dipoles off an 89 foot
>tower and never could make the array work. This was for 80m dipoles and I
>tried many variations, including using the shortened dipoles with loading
>coils. Just could not get the proper separation.
>de Joe, aa4nn
>----- Original Message -----
>From: "Tony Osman" <tony.osman at xplornet.com>
>To: <antennaware at contesting.com>
>Sent: Tuesday, February 17, 2009 7:43 PM
>Subject: [Antennaware] 40m array
> >I thought there might be some words of wisdom for me on this list....
> > I am looking to build a 40m 4-square but currently I am looking at
> > mortgaging the house to pay for aluminum - cant seem to find a scrap
> > yard anywhere that has any - they are recycling as fast as they can get
> > the money for it....
> > So, I have a 68ft vertical built from 3inch irrigation tubing. Could I
> > use this to suspend a K8UR type dipole array? I understand that to get
> > the best operation of this array, the coax feeding the dipoles should
> > come away parallel to the ground. This means they would connect to the
> > vertical at about 25 feet or so off the ground. I would then bring the
> > coax down the vertical to the matching box at the base of the vertical
> > (of course adjusting the coax lengths to provide correct current forcing
> > to each dipole).
> > My question is - when using the vertical on 80m and 160m (it will have a
> > trap at the top of the vertical with top-loading wires for 160m) with
> > approx 1KW, will there be any adverse effect on the dipole array or the
> > matching network - similarly would these have any effect on the vertical
> > for 80/160 operation?
> > Thanks in advance for any information.
> > Tony
> > Ve3rz
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