Dave has done a really nice job on this tuner. One thing to point out is
the fact that he is using RG-213 coax for the balun material. The use of
foam type coax in a tight wound configuration will most likely allow the
center conductor migrate through the foam and eventually short to the
shield.
As a side comment, the use of this type balun has proven to provide the best
balance and actually forces a balance across a wide frequency range with
greater power handling abilities than most if not all ferrite wound baluns.
73
Bob, K4TAX
----- Original Message -----
From: "Dave Marling" <ve1vq@auracom.com>
To: <tentec@contesting.com>
Sent: Friday, July 11, 2003 6:43 AM
Subject: Re: [TenTec] Balanced Tuners
> At 10:47 PM 10/07/2003 -0500, you wrote:
> >This arrangement for a tuner that Ken speaks of is one of if not the
finest
> >performing tuner I've ever seen or used.
>
> I have some pictures of a poor person's version of Measures' balanced
tuner at
>
> http://users.auracom.com/dbm/tuner/tuner1.jpg
> http://users.auracom.com/dbm/tuner/tuner2.jpg
> http://users.auracom.com/dbm/tuner/tuner3.jpg
>
> It feeds about fifty feet of balanced line to a 950' horizontal
> loop. Driven by a Jupiter into a Dentron Cliperton L.
>
> Note the insulated shaft to the knob in the second picture.
>
> After building and installing this about a year ago my problems with rf
> into the computer and alarm system disappeared.
> The previous setup used RG8 to a balun at the feedpoint.
>
> Dave
> VE1VQ/VA6NS
>
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