Jim
I have used that type. In fact-- my first non-ducky 2M antenna was made on
an SO238 panel mount, hung from the ceiling light fixture in the shack.
However there is confusion about the difference between what we,
individually, do, and what the WWV setup is.
I would like to know, just as I would like to know the real description of
the claimants on TT. I know there is confusion about the use of a radial
system, and I suspect the location of the feedpoint is the key.
Bill-W4BSG
----- Original Message -----
From: "Jim Hargrave" <w5ifp@gvtc.com>
To: "Towertalk" <towertalk@contesting.com>
Sent: Monday, April 06, 2009 9:09 AM
Subject: Re: [TowerTalk] Vertical vs Beam
> Bill,
>
> I have used this type antenna for several years. It is a very common
> VHF/UHF
> antenna because of its simplicity. It makes a great 17 meter antenna and
> is
> easy to construct without a lot of real estate.
>
> I offer further comment embedded below:
>
> >-----Original Message-----
> >From: towertalk-bounces@contesting.com
> >[mailto:towertalk-bounces@contesting.com]On Behalf Of Bill Aycock
> >Sent: Monday, April 06, 2009 13:37
> >To: Michael Tope; N7mal
> >Cc: towertalk@contesting.com; John Geiger; Robert Redmon
> >Subject: Re: [TowerTalk] Vertical vs Beam
> >
> >
> >As far as the subject of 1/2 wave verticals goes, the WWV site
> >leaves out a
> >LOT!
> >1. Where is the feed point?
>
> Feed point is at the top of the skirt and the base of the 1/4 wave
> vertical
> on top.
> Coax shield to skirt and center to top vertical.
>
> >2. what is the feed point impedance?
>
> Nominal 50 ohm. This is accomplished by the angle of the skirt to the
> driven
> element.
>
> >3. Are the lower ends of the "guys" grounded?
>
> Nope. They should have insulators at the 1/4 wave point. The more skirt
> wires you install the more uniform the radiation pattern.
>
> >4. Why is it important that the Coax feeds do not cross?
>
> Good question. That one is above my pay grade.
>
> * 73's Jim W5IFP *
>
>
> >Does anyone know?
> >Are the arrangements of the TTers with 1/2 wave verticals like
> >WWV, and if
> >not, why reference it?
> >Bill--W4BSG
> >
> >
> > ----- Original Message -----
> >From: "Michael Tope" <W4EF@dellroy.com>
> >To: "N7mal" <n7mal@citlink.net>
> >>
> >>>----- Original Message -----
> >>>From: N7mal
> >>>To: John Geiger ; towertalk@contesting.com
> >>>>>
> >> WWV uses 1/2 wave verticals:
> >>
> >> http://tf.nist.gov/timefreq/stations/wwv.html
> >>
> >>
> >
> >
> >_______________________________________________
> >
> >
> >
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> >TowerTalk@contesting.com
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>
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>
>
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