Yes, as SM2CEW points out these formulas are overruled
these days, this stuff is probably 20 years old by now.
However, using these formulas might not produce a 100%
optimum array but I dont think it will be far off but
for EME when you are hunting tens of dB´s it might not
apply any more.
de SM2EKM
>
> Formula you are looking for might be:
>
> y
> X= --------
> 2sin(Z/2)
>
> where X= optimal stacking distance
> Y= lambda (boom lenght)
> Z= 3 dB beamwith angle
>
> This is from work by DL6WU
>
> This is alo used
>
> Stacking dist= 57.3
> -------------------
> 3 dB beamwith / 2
>
> This is for VHF/UHF stacking for optimum pattern EME arrays.
> Will give very clean pattern with low sideloobs, i e the
> array will have very good G/T.
>
> I hope I didn´t mess these formulas up but I think this
> might be what KQ2M was thinking about, in any case I dont
> think it does add anything important to this subject.
>
> 73, Jim SM2EKM
> ------------------------------------------------------------
> However, this doesnt apply for HF stacking where we
> are looking for other things.
>
>
> >
> >
> > Some advice to take the effective boom length of the antenna in
> > wavelengths
> > and take the square root of it. This is the optimum stacking
> > distance of
> > your beams in Wavelength.
> >
> > I think it is way too general not taking into account heights and
> > antenna
> > specifications.
> >
> > You can only find the answer with modelling software.
> >
> > Tonno
> > ES5TV
> >
> > ----- Original Message -----
> > From: "Robert Shohet" <kq2m@mags.net>
> > To: <towertalk@contesting.com>
> > Sent: Friday, July 27, 2001 8:47 PM
> > Subject: [TowerTalk] Optimum Stacking Distance
> >
> >
> > >
> > > I have been told that there is a formula for the optimum
stacking
> > > distance
> > > of similar antennas that is based on the antenna boom lengths
and
> > > other
> > > factors.
> > >
> > > If anyone is familiar with this, could they please post the
> > >formula?
> > >
> > > Tnx & 73
> > >
> > > Bob KQ2M
> > >
> > >
> > >
> > >
> > > -----
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> > >
> >
> >
> >
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> >
>
>
>
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