I've got 4/4 on 20m at 100 and 50 feet. The stack is usually louder to
Europe BUT:
often in the afternoon, maybe 1900z or so, the lower antenna is signifantly
better, a couple of "S-Units." I rarely see significant benefits to the
lower antennas alone in the 10m (25/50/75') or 15m (35/70/105) stacks.
73
Ted, KR1G
>From: Pete Smith <n4zr@contesting.com>
>To: <TOWERTALK@contesting.com>
>Subject: Re: [TowerTalk] Are higher HF antenna's really better?
To: <towertalk@contesting.com>
>Date: Thu, 10 Jan 2002 10:29:05 -0500
>
>
>At 03:12 PM 1/10/02 -0000, Sain'T Tom wrote:
> >
> > I once used 2 of the same 3 element 15 meter yagis simultaneously
>from
> >my old QTH in South Carolina. One was at 70 feet on the tower top and
>was
> >rotatable. The other was fixed on Europe at 40 feet. Both had
>electrically
> >equivalent (same electrical length) feed lines of RG213.
> >
> > Reports from Europe generally, but not always, gave the stack a
>slightly
> >stronger signal report. The lower sometimes would be reported just as
> >strong as the upper, but NEVER was it reported that the lower was
>stronger.
>
>I think band and sunspot cycle phase have a lot to do with this.
>Certainly, as N4KG says, if you can have multiple antennas there are lots
>of reasons to do so, including but not limited to stacking. But if you can
>only have one, and particularly if it is a tribander, somewhere between 75
>and 100 feet is very nice indeed, but I'm not sure it makes a lot of
>difference which end of that range you're at.
>
>My 2-high stack of C-3Es is at 97 and 69 feet, and I have only heard
>signals louder on the lower antenna than the upper one, on any band, on one
>or two occasions. My hunch is that if I had a third antenna at 32-33 feet,
>there's a greater chance that I'd notice differences between single
>antennas, but most of the time, the whole stack together would still be
>best.
>
>73, Pete N4ZR
>
>The revised World Contest
>Station Database
>is online at www.pvrc.org
>
>
>
>
>
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