[TenTec] Eagle Tuner

[Al Gulseth]

From the "horse's mouth" (so to speak):

"In bygone days, the standard ham antenna was the end-fed or center-fed Zepp. 
It got its name from a style of antenna that was used on Zepplin airships."

"Feeding Your Station" by Doug DeMaw, W1FB, QST December 1983
https://www.arrl.org/files/file/Technology/tis/info/pdf/128320.pdf

73, Al

On Tue September 9 2014 5:02:08 pm Bob McGraw - K4TAX wrote:
> I wondered that too.  I thought a Zepp would be and end fed dipole fed with
> 1/4 wave of open wire line.  Of course there is the extended Zepp and the
> Extended Double Zepp configuration and a few others.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message -----
> From: "Jim Allen" <jim.allen at longhornband.net>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Tuesday, September 09, 2014 3:46 PM
> Subject: Re: [TenTec] Eagle Tuner
>
> > 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 at 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 at windstream.net]
> >> Sent: Tuesday, September 09, 2014 7:16 PM
> >> To: tentec at 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 at Blomand.net>
> >> > To: "Discussion of Ten-Tec Equipment"<tentec at contesting.com>
> >> > Subject: Re: [TenTec] Eagle Tuner
> >> > Message-ID: <0A929A3D3D8345A5B703110D42D859D7 at 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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