[TowerTalk] Everything Works QST Article by N6BT
J. Edward (Ed) Muns
w0yk@msn.com
Fri, 1 Feb 2002 10:39:56 -0800
A "multi-monoband yagi" is simply a structure with more than one monoband
yagi on a single boom. It is "monoband" because each element is resonant
only on a single band. It is "multi-" because there are 2 or more sets of 2
or more monoband elements on the same physical boom. And, yes, the various
elements are often, but don't have to be, "interlaced". This is distinct
from a multi-band antenna that deploys multi-band elements. The words work
for me, but I'm certainly not a language expert.
73,
Ed - W0YK
> -----Original Message-----
> From: owner-towertalk@contesting.com
> [mailto:owner-towertalk@contesting.com]On Behalf Of John Tait
> Sent: Friday, February 01, 2002 9:44 AM
> To: Mike; force12e; towertalk@contesting.com; Force12Talk
> Cc: Tom Schiller
> Subject: Re: [TowerTalk] Everything Works QST Article by N6BT
>
>
>
> 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.
> > >
> -----------------------------------------------------------------------
> > >
> > > -----
> > > FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> > > Submissions: towertalk@contesting.com
> > > Administrative requests: towertalk-REQUEST@contesting.com
> > > Problems: owner-towertalk@contesting.com
> > >
> > >
> >
> >
> >
> >
> > ________________________________________________________________________
> > 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.
> > -----------------------------------------------------------------------
> >
> > -----
> > FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> > Submissions: towertalk@contesting.com
> > Administrative requests: towertalk-REQUEST@contesting.com
> > Problems: owner-towertalk@contesting.com
> >
> >
>
>
> ________________________________________________________________________
> 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.
> -----------------------------------------------------------------------
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
>
>
________________________________________________________________________
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.
-----------------------------------------------------------------------
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com