Sounds to me just like a fat shunt feed, at least in principle.
73, Pete N4ZR
At 10:23 AM 9/24/2008, Dennis wrote:
>A new technique for feeding towers has been adopted for Amateur use from
>the broadcast industry. You drop 3 heavy gauge wires connected at the top
>of the tower to within a few feet of the bottom. Connect the three wires
>together with a wire ring around the base of the tower and feed that ring,
>connected to the three wires, with a simple L-Network with respect to your
>radial system.
>
>Very effecient system. Several local DXers us it on 160m and 80m with
>great results. One tower is 140' and the other I know is about 90' with a
>lot of top loading from various beams....
>
>You can Google this type of tower feed and get more information....
>
>Dennis, k0eoo
>
>
>---- Don Hall <donhall161@sbcglobal.net> wrote:
> > Use your tower with gamma or omega matches on 80/160. Works best with a
> > self-supporting one, but lots of operators use insulated guys.
> >
> > I made my 160 DXCC with an LM354 loaded that way on an 80x120 lot in the
> > middle of town.
> >
> > Can be done.
> >
> > 73 Don K5AQ
> > ----- Original Message -----
> > From: "Richards" <jruing@ameritech.net>
> > To: <donovanf@starpower.net>
> > Cc: <TowerTalk@contesting.com>
> > Sent: Tuesday, September 23, 2008 4:03 PM
> > Subject: Re: [TowerTalk] (no subject) Vertical Antenna Instead ofTower
> > Decision....
> >
> >
> > > Hi Frank --
> > >
> > > Thanks for the strong reply to my questions. Based on your comments, I
> > > would be better off making higher, longer, and better wire antennas and
> > > working towards a beam on a tower, instead of looking for a vertical
> > > compromise today.
> > >
> > > The six month tower estimate is my own estimate based on several
> > > factors, including the time it takes to 1) research and plan the tower,
> > > 2) order it and have it arrive - many companies are several months out
> > > on delivery dates, 3) the time it takes to get the local tower expert
> > > over
> > > to put it up -- regardless of how much money I MIGHT save, I plan to
> > > hire it done by a licensed, bonded, insured, experienced and collectible
> > > professional I can sue when it falls over. (I am a retired trial
> > > lawyer...I
> > > KNOW the liabilities and risks.. ), and 4) it takes time to get the
> > > antenna
> > > delivered, assembled, and ready for installation. Moreover, it is nearly
> > > October and we will soon be in the Michigan rainy season, and then
> > > snow flies starting in November for the next 5 months, and the reliable
> > > good tower guys do not install in winter.
> > >
> > > Thus,... I figure I could realistically get my tower up starting next May
> > > as I cannot get it all arranged before November. This makes it a
> > > winter project that can go up early spring if I get on it starting now.
> > >
> > > THE REAL DILEMMA
> > >
> > > My real problem is that I want to work the lower bands and do not have
> > > much space for long wires. I can put up a tower and a modest beam...
> > > but that will realistically only get me out on 20 Meter and higher. I
> > > will
> > > still be stuck for anything on the low bands... which is why the HyTower
> > > and the mono pole vertical (which can both be tuned down to 160 and 80
> > > meters) were so appealing on paper.
> > >
> > > Thanks for any other suggestions you might have.
> > >
> > > ================ JH Richards - K8JHR =================
> > >
> > >
> > >
> > >
> > >
> > > donovanf@starpower.net wrote:
> > >
> > >> 1. Retain your existing antennas until you install something more
> > >> permanent.
> > >> > Compared to your existing antennas, you'll be disappointed in the
> > > performance of any of the alternatives you listed on 20 thru 10 meters.
> > >
> > >> 2. Accelerate your tower installation.
> > >> Its not obvious why a tower installation must take 6 months.
> > >
> > > =======================================================
> > > _______________________________________________
> > >
> > >
> > >
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> > > TowerTalk@contesting.com
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> >
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> >
> >
> >
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