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
>
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