[Elecraft] Antenna

Mon Nov 4 07:43:00 2002

See also http://usa2way.homestead.com/CliffDweller.html

Tony
G7IGG
----- Original Message -----
From: "Bob Nielsen" <[email protected]>
To: <[email protected]>
Sent: Sunday, November 03, 2002 7:04 PM
Subject: Re: [Elecraft] Antenna


> I recall seeing ads for slinky antennas in the ham magazines several
> years ago. A google search on "slinky antenna" returns many hits and
> some useful information on the subject.  There is a commercially made
> version at http://www.antennasmore.com/helitrix.htm.
>
> 73,
>
> Bob, N7XY
>
> On Sun, Nov 03, 2002 at 11:43:50AM -0500, Helmut Usbeck wrote:
> > Since the antenna subject came up again, I'd give the results of this
one.
> > Years ago when I was in the Army Signal Corps I saw some guys fooling
> > around with an antenna that looked, and was made out of two slinkys.
> > It was not homebrewed but was commercially made.  They just stretched
the
> > slinky's out and fed the coax into their T-195 transmitter which had an
> > auto-tune antenna tuner.  Worked out as good as the normal Army issued
> > doublets or whip antennae.
> >
> > Well I finally got around to playing with this setup.  I took one slinky
> > and mounted it on a length of PVC and lashed it vertically to the
railing
> > on my terrace.  For a "ground" I used the railing of the terrace.  One
> > tunes it by lengthening or shortening it.  Seven and one-half feet is a
> > good starting point for 40 meters.  Two slinky's need to be spliced
> > together for 80 meters.  No problem getting a 1 to 1 SWR, without a
tuner.
> >
> > A dipole can be made with two of them supported though the middle of the
> > slinkys with nylon cord which also serve as insulators. It's fed of
course
> > with coax.  This was pretty much the setup the Army used. When done it
can
> > be collapsed and put into a large pocket. I was told (by people who
> > were never in the military) that this antenna was used extensively in
Viet Nam, but I never seen any when
> > I was there (1968).  It's also not the famous "jungle antenna".  I've
seen
> > them used when I was stationed down in the Canal Zone(1969).  A warrant
officer
> > did tell me that they were used since the 1950's experimently.
> >
> > So far I've worked into the NE, down south, and into the mid-west with
59
> > reports from my QTH in NYC using a K2/100 on sideband.  I'm a rather
> > casual operator and haven't chased any DX.
> >
> > Has anyone else tried slinkys?
> >
> > Regards,
> > Helm.  WB2ADT
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