[TenTec] Eagle Tuner

[Bob McGraw - K4TAX]

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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