[TowerTalk] C3-SS Problems sort-of resolved

[force12e]

Eric,

In as much as turning the C3SS causes variation in VSWR, there is a very
high probability of destructive interaction between the C3SS and something
conductive nearby.  Some probabilities include house wiring, guy wires,
drain spouting other antennas or anything that can conduct RF.

A solution is to raise the antenna even if just a few feet as this can often
reduce the harmful interaction.  The C3SS is not any more susceptible to
this problem than any other efficient antenna using full size or loaded
elements.

Hope you find a solution.

73

Natan W6XR
Force 12 East
Ithaca, NY
FN12sk
force12@qth.com
----- Original Message -----
From: "Eric Rosenberg" <wd3q@erols.com>
To: <towertalk@contesting.com>
Sent: Friday, October 20, 2000 10:37 PM
Subject: [TowerTalk] C3-SS Problems sort-of resolved


> A couple of months ago, it seemed my very early model C-3SS suffered a
> performance degradation.
>
> Many suggested that I replace the ~100 ft 9913 feedline, so last
> weekend, I did. As it happens, the feedline was 9913 with a 6 ft RG-213
> jumper at the end.  The new feedline is a single piece of RG-213 --
> this time 125 feet long -- the the excess (25-or so ft) neatly coiled
> up outside the shack
>
> The results were less spectacular than I might have otherwise thought!
>
> The antennas is ~6-2/2 feet above the peak of the roof on a 4-legged
> roof tower.
>
> In checking the SWR, it appears to change depending on the position
> (dorection) of the antenna relative to the roof.  Parallel to the peak
> is different than perpendicular to it!
>
> Is this normal?  My climber, N3OC apparently has a similar experience
> this with his TA-33jr. What a srprise this is!
>
> A question...will subtracting feedline -- making it closer to what it
> was -- make a difference?
>
> Thanks in advance,
>
> Eric W3DQ
> Washington, DC
>
>
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