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Subject: Force 12 Talk
Author: William F. Beyer Jr. <n2wb@bellsouth.net>
Date: 03-Mar-2000 12:58:30


Natan Huffman wrote:

> Friends,
>
> This reflector is working better than I ever hoped! The C31XR uses a
> combination open and closed feed system developed specifically for the XR
> series of antennas. The closed sleeve part of the feed includes the two
> wires that are connected at one end to the 10 meter driver and at the other
> to the 20 meter driver. The spacing between these two wires if not correct
> can cause 15 meter resonance well below the band and subsequent higher and
> out of spec VSWR on 15 meters. A spacing of anything greater than 1/4" will
> usually cause this high VSWR problem. This issue seems to be exacerbated by
> installations of lower than 1 wavelength.
>
> Easily, 95% of the field inquiries I receive asking about high VSWR can be
> addressed by movement of these two wires. Unlike and contrary to what is
> shown in photographs and text in earlier manuals, these wires need to be
> quite close together. A good solution is to put a width of vinyl tape every
> 12" or so along the length of these wires. This action will normally bring
> the resonance up to a point within the band and will result in a low VSWR
> throughout the band.
>
> Most other 15 meter anomalies have to do with 40 meter beams in the
> neighborhood. A few have even been traced to incorrect element lengths!
>
> I am getting the manuals changed and eliminating the photographs in the
> manuals so that we do not continue having this problem.
>
> Natan W6XR/2
> FORCE 12 East
> Ithaca, NY

FORCE 12 ON THE JOB.......
VERY FAST ANSWER BY NATAN!

FORCE 12
THE ANTENNA THAT OTHER'S LOOK UP TOO!

73, WILLIAM/N2WB


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This Thread
  Date   Author  
02-Jan-2001 J B
* 03-Mar-2000 William F. Beyer Jr.
This Author (Mar-2000)
  Subject   Date  
* Force 12 Talk 03-Mar-2000