Man...would just love to play with this one...
http://www.lltuners.nl/
----- Original Message -----
From: "Rob Atkinson" <ranchorobbo@gmail.com>
To: <tentec@contesting.com>
Sent: Friday, April 11, 2008 9:53 AM
Subject: Re: [TenTec] Ten Tec 238A settings?
>I recommend that you don't use the ten tec tuner (which I do use for
> unbalanced feedlines, and it is very good for that--I am a big L network
> fan) and instead tune the 600 ohm parallel line directly with a balanced
> tuner such as the one made by Palstar. It uses a pair of synchronized
> roller inductors and a single variable cap--each inductor is in series
> with
> a side of the balanced line and the cap is between them and can be
> switched between the high Z and low Z sides. Think of it as a pair of L
> networks in parallel sharing the capacitor. The "balun" can be a 1:1
> bead
> or coax choke on the low Z side where the impedence is always nearly 50
> ohms. I use this arrangement and it works great. Of course, you have to
> work out a way to bring in the balanced line to the tuner but there are
> many
> creative ways of doing this. We have almost exactly the same antennas
> for
> I use a loop of roughly the same length, height and is somewhat a
> trapezoid
> shape, fed in the middle of one long side.
>
> 73
>
> rob / k5uj
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