Actually the earlier models had three yagis on the same boom. First
all of one, then all of the next, then all of the last. That was three
monoband design, one in front of the other. Thus the genesis of the
term.
A multiband quad is like the F12 interlaced antennas in that a given
element is only active on a SINGLE band. In many trapped antennas,
each element is active on EVERY band, and the spacing is a compromise.
In the F12 design, optimal spacings can be used for directors and
reflectors, and traps to allow multiband use of a given element are
not needed.
It turns out THOSE distinctions are related to SUBSTANTIAL performance
improvements.
Why NOT market the distinction? Doesn't every manufacturer do
something to conceptualize the differences between himself and his
competitors? Is that a bad thing?
----- Original Message -----
From: "John/K4WJ" <k4wj@bellsouth.net>
To: <w0yk@msn.com>; "John Tait" <bravo@iol.ie>
Cc: "Tom Schiller" <force12@fix.net>; "Mike" <W4EF@dellroy.com>;
"force12e" <force12e@lightlink.com>; <towertalk@contesting.com>;
"Force12Talk" <force12talk@qth.com>
Sent: Sunday, February 03, 2002 7:22 PM
Subject: RE: [TowerTalk] Everything Works QST Article by N6BT
At 10:39 AM 2/1/02 -0800, J. Edward \(Ed\) Muns wrote:
>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.
This is like saying that my two element five band quad is a multi-mono
band
quad because it has separate feeds for each driven loop. Me thinks
someone
is trying to change definitions on us.
It appears to me that this thing they call a "multi-mono band yagi" is
nothing more than a multi band yagi with separate feeds for each
driven
element. There is nothing mono band about the antenna since more than
one
driven element exists on the boom. Hmmm! "A multi band yagi with
individual
feeds for each band." I guess some marketing guy tried to reduce the
number
of words so he came up with the confusing "multi-mono band yagi".
73..de John/K4WJ
***********************************************************
John/K4WJ in Pembroke Pines, FL
QTH 26 00 51 N
80 16 16 W
K8PXG from 18 Jun 59 to 11 Feb 97
K8WJ from 12 Feb 97 to 07 Apr 97
ZF2HZ from 17 May 84 to 31 Dec 84
***********************************************************
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