David,
I'll share with you and the TowerTalkians the swr curve of my C-3 that I
just put up last weekend at 52 feet very near the side of my single story
home. I used the default mid-band element lengths. The swr was measured
with the only instrument I own, a RF Applications P-2000A RF Power/V.S.W.R.
Indicator. (the meter on my Omni VI seems to agree)
28.0=1.45vswr 28.1=1.35vswr 28.2=1.25vswr 28.3=1.2vswr 28.4=1.2vswr
28.5=1.2vswr 28.6=1.25vswr 28.7=1.4vswr 28.8=1.55vswr 28.9=1.7vswr
29.0=1.9vswr 29.1=2.0vswr 29.2=2.2vswr 29.3=2.5vswr 29.4=2.6vswr
29.5=2.8vswr 29.6=3.0vswr 29.7=3.1vswr
I'm not thrilled that it is up to 3.1 on the high end, but I'm very pleased
how low it is over the main areas that I use most often! (I could shorten
some of the 10 meter elements to pull the dip more towards the middle of the
band) My Ten-Tec is not bothered by the 3.1 anyway!
15 is not over 1.55 at any band edge, and 20 doesn't exceed 1.35! This has
been the most successful antenna project I've ever experienced.
10 meters is my favorite band and I would not want to narrow the band width
if I could avoid it and that's why my recommendation would be the C-3 over
the C-3S.
73 Bill
William (Bill) E. Handy Jr. - K6LF
?
"Labour to keep alive in your breast that little spark of celestial
fire, called conscience". -George Washington
> -----Original Message-----
> From: owner-towertalk@contesting.com
> [mailto:owner-towertalk@contesting.com]On Behalf Of DavidC
> Sent: Sunday, October 18, 1998 7:38 PM
> To: K7LXC@aol.com; Swilsonac6@aol.com; towertalk@contesting.com
> Subject: Re: [TowerTalk] Force 12 C3 series
>
>
>
> > > I guess my question is -- Does anyone with real experience with these
> antennas
> > > have any reason one should buy a C3S instead of a full size C3
> (except the
> > > slightly narrower 10M bandwith) ?? Swilsonac6@aol.com
> > For all intents and purposes, it's the same antenna but with less
> > turning radius. The C-3SS was the result of trying to shrink the C-3.
> They all work FB.
> > Cheers, Steve K7LXC
>
> I was just convinced to pass on a nice used C3S because I was told by my
> Elmer that boom length is critical to gain and the C3S is way too short to
> claim gain close to the C3 ... I suppose this will stir up some sort of
> hornet's nest about the boom length issue ... go for it, as always it is
> certain to be a wonderful education ... and I will shut up and
> just read.
> 73, DavidC AA1FA
>
>
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