Stephanie: Think of your antenna as a dipole with the tower being one
half of it. The tower is not a ground plane.You can expect to have to
experimentally change the length of the wire to get a low SWR. In one
antenna I built like yours, I had to make a 20 ft change in the wire
length to reach resonance on 160m. You may have a problem using a MFJ
259 type meter to measure SWR because of BC station pickup. If you see
no SWR dip at any frequency, that is probably the reason.Use your rig on
low power as a signal source. 73, Dan, N5AR
Stephanie WX3K wrote:
>
> My tower is 65 feet with a Mosley Pro95 beam sitting just above the thrust
> bearing. The "Half-Sloper" is hung at a 45 degree down at the 50 foot
> level.....about 128 feet of wire...fed at the 50 foot level with 50 ohm coax
> and the shield ground right there on the tower. Anyone ever try this ??? The
> match I have is still unacceptable...2.5 to 1.....Any suggestions ?
>
> Stephanie R. Koles WX3K
> wx3k@arrl.net
> http://www.qsl.net/wx3k
>
> Assistant Skywarn Coordinator Somerset County, NJ
> Mt. Holly Skywarn Technical Committee Vice Chair
>
> AN Wireless Self Supporting Towers are now available! Windloading tables,
> foundation diagrams and charts, along with full details are now at the
> AN Wireless Web site: http://www.ANWireless.com
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
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AN Wireless Self Supporting Towers are now available! Windloading tables,
foundation diagrams and charts, along with full details are now at the
AN Wireless Web site: http://www.ANWireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
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