I can't say for sure other than that's what my SK dad (first licensed in
the '30s) called his. Apparently that was the common terminology in the old
days for what is technically as I understand it a tuned doublet as opposed to
a dipole since it's fed with balanced/tuned feeders.
Just my $0.02 worth....
73, Al
On Tue September 9 2014 3:46:59 pm Jim Allen wrote:
> What makes a 130' center fed dipole a Zepp?
>
> 73 de W6OGC Jim Allen
>
> On Tue, Sep 9, 2014 at 3:44 PM, Rick - DJ0IP / NJ0IP <Rick@dj0ip.de> wrote:
> > That is an excellent setup, John. Nice choice.
> >
> > I'm a friend of that antenna too and have used it most of the time for
> > the past 50 years.
> >
> > Can't run openwire at this QTH so I had to develop a different antenna
> > that works all bands with coax, no matchbox - except of course to tune
> > across the
> > entire 80m band.
> >
> > The 238 is a great matchbox. I have one too. Used to use it with
> > openwire with a home-brew balun built after a circuit recommended to me
> > by Bob (K4TAX).
> >
> > Your description of the balun isn't enough to say whether or not it is
> > OK; it's not just a matter of having a big core inside, it also counts
> > "how it is wired". Being "Military" is meaningless. The military bought
> > a lot of bad stuff as well as good stuff. But if you are not having any
> > problems, then it is probably OK.
> >
> > On bands it won't load, simply add 1/8 wavelength of additional feedline
> > and
> > I'm certain you will find that it then loads OK.
> >
> > 73 - Rick, DJ0IP
> > (Nr. Frankfurt am Main)
> >
> > 73 - Rick, DJ0IP
> > (Nr. Frankfurt am Main)
> >
> >
> > -----Original Message-----
> > From: John F. [mailto:k4avx1@windstream.net]
> > Sent: Tuesday, September 09, 2014 7:16 PM
> > To: tentec@contesting.com
> > Cc: Bob McGraw - K4TAX; Rick - DJ0IP / NJ0IP
> > Subject: re: Eagle Tuner
> >
> > I've been a little fuzzed up with computer problems - think I missed some
> > of
> > the discussion. I use a center fed zepp, 130' long, fed with 450 ohm
> > plastic covered open wire. It's fed through a big military surplus
> > balun, big cores, inside an sealed aluminum box outside. 4 or 5' of RG-8
> > out to that from a TT 238 tuner. It loads well on almost all bands, and
> > seems to have a decent signal, as shown in the recent W1AW/KY exercises.
> >
> > I also have a Cushcraft Mini-beam at about 40' which isn't great, but
> > gives a little boost. Ten-Tec Hercules II matches up well with the
> > Eagle, and a friend gave me the Amp switch made by WB8VGE, which works
> > like a charm. I can't tell its operation from the full break-in operation
> > with the Omni Vi+.
> >
> > (Which is
> > in Sevierville for a 20 year checkup right now.
> >
> > Really enjoying the Eagle.
> >
> > 73,
> > John, K4AVX
> >
> > > Message: 3
> > > Date: Tue, 9 Sep 2014 09:33:54 -0500
> > > From: "Bob McGraw - K4TAX"<RMcGraw@Blomand.net>
> > > To: "Discussion of Ten-Tec Equipment"<tentec@contesting.com>
> > > Subject: Re: [TenTec] Eagle Tuner
> > > Message-ID: <0A929A3D3D8345A5B703110D42D859D7@FAMILY>
> > > Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> > > reply-type=original
> > >
> > > Yes, most internal tuners are very limited with a matching range SWR
> > > of typically 3:1 or less. The design of the Tentec internal tuners
> > > provides for the SWR matching range to be typically 10:1. Of course
> > > external tuners will likely have a much wider matching range. For use
> > > after the amp I use a Tentec 238 for the coax fed antennas or for the
> > > balanced fed antennas I have a dual roller home brew balanced tuner.
> > >
> > > 73
> > > Bob, K4TAX
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|