[TenTec] Eagle Tuner

[Rick - DJ0IP / NJ0IP]

Actually it's know as a "double-zepp" when it is fed with openwire.
As to what makes it that, well I guess the only answer is "tradition".

Personally, I prefer to call it an openwire-fed doublet.
But heck, what's in a name?
As long as we all understand what it is, that's the important thing.

73 - Rick, DJ0IP
(Nr. Frankfurt am Main)


-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Jim Allen
Sent: Tuesday, September 09, 2014 10:47 PM
To: Discussion of Ten-Tec Equipment
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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