Fw: Re: [TowerTalk] Everything Works QST Article by N6BT
Donald L Kerouac
k9nr@juno.com
Fri, 1 Feb 2002 14:03:33 -0600
John,
A circle is just a square without the pointy parts. :-))
Sure wish I could have heard your Irish Brogue refer to "Dinny Flaherty!"
73...Don, K9NR
WHAT in the name of the divine Dinny Flaherty is a "multi-monoband
yagi"....??????
WHY do people take such liberties with the Greek, Latin and English
languages..??
Multi means MANY......and mono means ONE...!!!
Make up your minds guys...It's either a MULTI band antenna OR a MONO
band
antenna
It can NOT be both..
It could however, be an "interlaced" yagi...which I suspect it is..
Who's going to be the first to produce a square circle I wonder..???
73s
de
John EI7BA
----- Original Message -----
From: "Mike" <W4EF@dellroy.com>
To: "force12e" <force12e@lightlink.com>; <towertalk@contesting.com>;
"Force12Talk" <force12talk@qth.com>
Cc: "Tom Schiller" <force12@fix.net>
Sent: Friday, February 01, 2002 6:48 AM
Subject: Re: [TowerTalk] Everything Works QST Article by N6BT
>
> >
> > So, Tom (W8JI), where in the QST article do I state tribanders have
> > negative 10dB gain
> > and where in the article do I describe the ionosphere in such a
manner?
> >
>
> My friend John and I were discussing this controversy this afternoon,
so
> when I came home from work, I decided to pull out the QST article and
see
> for
> myself. On page 49 of the July 2000 issue of QST there is a graph
(figure
2)
> which plots relative "enjoyment" versus antenna gain for various types
of
> antenna ranging from a lightbulb up to "Large mono/multi-monoband
stacks".
> The horizontal scale is a little hard to interpret (I am not quite sure
> where the
> +8dBd point lies), but if you assume the horizontal scale is linear,
then
> this
> graph shows that a "Low efficiency Trapped triband Yagi" at ">35 feet"
is
> around 5dB down from a "High efficiency trapped triband Yagi" at ">35
feet".
> Likewise, using the same assumptions, this would put the "Low
efficiency
> trapped triband Yagi" at ">35 feet" 7.5 dB down from a "2 ele
Yagi/smaller
> multi-monoband" antenna at "> 35 feet" and 10.3 dB down from a "Larger
> mono/multi-monoband Yagi" type antenna at ">35 feet".
>
> Of course, the descriptors "Low Efficiency" and "High Efficiency" for
the
> "Trapped triband Yagi" are never clearly defined, nor is the size of
the
> "Trapped triband Yagi". A lot is left to the imagination (is he talking
> about
> a TA33JR or a TH7DXX?).
>
> Several longtime hams (all of them EEs) who I know, all came away
> with same impression that this article, although both very interesting
and
> very entertaining, was borderline advertising for Force 12. I had the
same
> reaction. I thought the article was generally interesting and
informative.
I
> really enjoyed the story about the curtain array on Saipan, and Tom's
> WAC exploits with the "illuminator". BUT I did come away with the
> impression that the relative positions of the multi-monoband yagis
(Force
> 12???) versus the trapped triband yagis (the competition???) were a bit
> contrived. Although I surely couldn't prove it, this part of the
article
> smelled like a sell job to me.
>
> As far as the reference to the non-linear ionosphere, I couldn't find
> any. One could infer that this is weakly implied in Tom (N6BT's)
> musings about the seemingly inexplicable huge differences between the
> curtain array and the tribanders on Saipan, but in my opinion that
would
> really be a serious stretch. BTW, I suspect the huge differences
between
> the two antennas are a combination of poor S-meter calibration (very
> common) and very a big gain advantage at very low takeoff angles for
> the curtain array (it was, after all, very late in the evening on 15
meters
> when you would expect takeoff angles to be very low). Perhaps
> someone should model this?
>
> 73 de Mike,
> W4EF.............................................................
>
>
> > The answer is that W8JI's claimed statement from me is no place in
the
> > QST article, nor
> > in any other of my writings. Fortunately, the QST article is in the
> > public domain and every
> > one can check it for themselves and not depend upon W8JI for
> > information.
> >
> > BTW, my QST article was not written for fun, although the thought of
> > using a lightbulb
> > might strike some as humorous or at least entertaining. I did enjoy
> > working ZD8Z to
> > complete Worked All Continents in 2 days on 10 CW using 120 watts and
> > the lightbulb, but
> > it was a serious article to open our collective eyes on how important
> > our antenna is to
> > our enjoyment of amateur radio. On the other hand, the 3 element,
phased
> > lightbulb array
> > I did after the article was done for fun and even though it was
> > directive and could take
> > a KW, it still was a lousy antenna! Thankfully, there were others
with
> > good enough
> > antennas that enabled making some QSO's with both lightbulb
"antennas."
> > As the article
> > was entitled, "Everything Works", the question remains, "How well and
> > compared to what?"
> >
> > 73, Tom, N6BT
> >
> > --------------------
> >
> >
> >
> >
> >
> >
________________________________________________________________________
> > Where do you get ICE bandpass filters & beverage matching boxes? The
> > same place that pays for the hosting of this list: The eHam Store.
> > Order online at http://store.eham.net.
> >
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> >
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> >
> >
>
>
>
>
>
________________________________________________________________________
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> Order online at http://store.eham.net.
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>
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