Re: [TowerTalk] Pseudo-Brewster Angle

[David Gilbert <xdavid@cis-broadband.com>]

Uhh ... that should have been "shorting".

Dave   AB7E

On 3/2/2016 5:08 PM, David Gilbert wrote:
> Sorting the far ends of radials doesn't accomplish much of anything 
> other than maybe holding the wires in place.
> Dave   AB7E
>
>
> On 3/2/2016 8:50 AM, Mike & Becca Krzystyniak wrote:
> > What about shorting together the circumference in a ring?
> > How does that affect the angle?
> >
> > MK
> >
> > -----Original Message-----
> > From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf 
> > Of N5KM
> > - Kris
> > Sent: Wednesday, March 02, 2016 12:07 AM
> > To: towertalk@contesting.com
> > Subject: [TowerTalk] Pseudo-Brewster Angle
> >
> > Reading the thread about an effective radial system got me thinking 
> > about
> > the pseudo-Brewster angle of a 1/4 wl vertical antenna. As strictly a 
> > mental
> > exercise, I calculated how much radial wire would be needed for an 80m
> > vertical Fresnel zone that results in a low (1-2 degree) pseudo-Brewster
> > angle. Assuming 120 radials of 5 wavelengths each that comes to 30 
> > miles of
> > wire on a parcel of at least 122 acres.
> >
> > The tips of the radial will be 68 feet apart. This raises the 
> > question is
> > this too far apart to affect the pseudo-Brewster angle? Devoldere 
> > says yes
> > (Low-Band DXing, 3rd ed.). He says they need to be no more than .05 
> > wl (13
> > feet) apart.
> > The return
> > currents will be nearly entirely collected by the close-in parts of the
> > radials. So that's not an issue. John doesn't show the math or other
> > analysis that leads to the
> > .05 wl figure so I'm not entirely convinced it's needed. However, if 
> > true,
> > that would require an additional 60 miles of wire.
> >
> > Kris N5KM
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