[Towertalk] Force 12 XR-5 spacing with KLM 40 and 80

[Howard Brainen]

Maybe I should lower the 80M to be 5 ft above the 40M beam, and then put the
XR-5 up top of the mast.  It would then be 15 feet above the 40M beam.

73, Howard WZ6Z

----- Original Message -----
From: "Guy Olinger, K2AV" <k2av@contesting.com>
To: "Howard Brainen" <hb@customprocess.com>; "TowerTalk (E-mail)"
<towertalk@contesting.com>
Sent: Thursday, May 09, 2002 3:52 AM
Subject: Re: [Towertalk] Force 12 XR-5 spacing with KLM 40 and 80


> No way you get me to put a five band 20-10 antenna in between 40 & 80
> antennas spaced only 12 feet.
>
> Something is bound to be detuned, either way, because the booms as
> well will be close to something that's resonant or acts like
> director/reflector to 14/18/21/24/28 MHz.
>
> The three element KLM will suck out 15 meters if the booms are
> parallel.
>
> F12 knows where to put forty on this antenna, behind the 18 MHz
> reflector. Not up, not down, but behind on the same boom. Their own 40
> "N" element antennas will mess up the 18 MHz if insufficiently
> separated above or below. The N element has an 18 MHz secondary
> resonance. That's why they stack well with traditional tribanders.
> Most other 40 meter antennas have a secondary resonance near 21 MHz.
>
> You need another plan.
>
> 73, Guy.
>
>
> ----- Original Message -----
> From: "Howard Brainen" <hb@customprocess.com>
> To: "TowerTalk (E-mail)" <towertalk@contesting.com>
> Sent: Wednesday, May 08, 2002 9:07 PM
> Subject: [Towertalk] Force 12 XR-5 spacing with KLM 40 and 80
>
>
> > I emailed Force 12 about this two weeks ago but no response.  I'm
> hoping
> > someone here can help.
> >
> > What is the optimum spacing to minimize interaction in this
> scenario:
> >
> > 40M 3 element KLM spaced 12 feet below KLM 80M rotary dipole.  I
> want to put
> > the Force 12 XR-5 multi bander between them.
> >
> > Should it be closer to the 80M?  If so, should I orient the 80M
> antenna in
> > line with the boom of the XR-5 or broadside to it?
> >
> > Force 12 talks about spacing with their own 40M beams, but results
> must be
> > different with the KLM's.
> >
> > If it makes any difference, the XR-5 and the 80M antenna will be on
> the same
> > mast and rotated separately from the 40M beam.
> >
> > Any ideas?
> >
> > Thanks....73, Howard WZ6Z
> >
> >
> >
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>
>