[TowerTalk] High Antenna

Tue, 07 Oct 1997 11:14:43 EDT

On Tue, 7 Oct 1997 07:04:16 -0400 Rick Dougherty NQ4I
<NQ4I@compuserve.com> writes:
>Bill Fisher and I have been bantering back and forth on a topic that I 
>feel
>is now worth bringing to the reflector...I just recently installed a 6 
>el
>10m yagi on a 28 foot boom ( former klm 610) which had been recently 
>yagi
>optimized by W4EA...with this antenna at the 145 foot level on my 
>tower it
>is 1-2 s units down from my other 2 antennas on 10m ,a 7 el on a 42 ft 
>boom
>at 45 feet, and a 8 el on a 48 ft boom at 55 ft...I think on the paths 
>that
>I have tested that the 6 el is just too high...Bill thinks that 
>something
>else is wrong....I have tested the new 6 el on the LU-PY path in the 
>day
>tim, and the VK-ZL path at night..I realize that this is by no means a
>valid test, but I think that N4KG would certainly agree with me that 
>this
>thing is too high...
>
>Any other ideas or comments??
>
>The new 10 m 6 has some nice characteristics though...it is extremely
>quiet, ground wave and back scatter contacts are much better...to name 
>a
>few...
>
>comments please...de Rick

I was at K6NA this past weekend operating in the CQP, and
I noticed a big drop in the background noise when selecting
the 140' high antennas. I was almost wishing I had more rf
gain in the rx. Signals were strong though, popping out of
the low background noise.

I remember W3LPL saying that the best antenna on the farm is
his big 10m monobander at 200'. His theory is that when the
antenna is that high in terms of wavelength, the lobes all
compress together, and the nulls become less pronouced. I
would imagine that with so many lobes, sooner or later you
are going to be loud everywhere, as propagation changes.

This doesn't directly answer your question, but then that's
a hard question. I would give it more time, and try it to
eu this winter.

Dave Hachadorian, K6LL
K6LL@juno.com

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