[Amps] Antennae (?)

[Adrian Flynn]

I seem to remember that there was 4 times as much Corona Discharge on a
Cubical Quad Antenna due to the 4 right angle turns.
Adrian KF7DYU

On Thu, Jul 12, 2012 at 11:37 PM, Patrick Barthelow <apolloeme at live.com>wrote:

>
> I remember Corona Discharge, aggravated by thin air of High altitude, and
> QRO at HCJB in Quito Ecuador, literally burned, melted the antenna element
> tips, and led to the adoption of the Cubical Quad Antenna.
>
> Best Regards,
> Pat Barthelow,  AA6EG
>
> > From: alex.k2bb at gmail.com
> > Date: Thu, 12 Jul 2012 23:28:58 -0400
> > To: k8ri at rogerhalstead.com
> > CC: amps at contesting.com
> > Subject: Re: [Amps] Antennae (?)
> >
> > Speaking of corona discharge...
> > I remember reading an article (back in radio technical university)
> regarding antennas detuning due to corona at the end of elements.
> > Soviet Union, military, kilowatts :)
> >
> > ... iPhone
> >
> > On Jul 12, 2012, at 19:23, "Roger (K8RI)" <k8ri at rogerhalstead.com>
> wrote:
> >
> > > On 7/12/2012 8:00 PM, Jerry Kaidor wrote:
> > >>> The most effective ball on the top of the vertical is the copper
> float
> > >>> from
> > >>> a toilet.  Especially appropriate when using 8 sweep tubes in
> parallel.
> > >>
> > >> *** Or six 3-500Zs?
> > >
> > > Sounds kinda fragile.  I'd go for the 3CW20,000A7 myself.
> > > And there is a real reason for the ball on top. The prevent, or
> minimize
> > > corona discharge at those higher powers, even the legal limit on a
> > > mobile whip.
> > >
> > > Running the legal limit on multi band, stub tuned verticals can get
> > > colorful. I burned the plastic caps off the ends on one.  All they
> > > needed was a 1/2" or 3/4" aluminum ball in place of the cap.
> > >
> > > BTW what material would make a good core for the matching transformer
> to
> > > run from 160 through six?
> > >
> > > 73
> > >
> > > Roger (K8RI)
> > >
> > >
> > >>
> > >>                 - Jerry Kaidor
> > >>
> > >>
> > >>>
> > >>> 73,  Colin  K7FM
> > >>>
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