[TenTec] Ten Tec 238A settings?

[Denton]

Man...would just love to play with this one...
http://www.lltuners.nl/
----- Original Message ----- 
From: "Rob Atkinson" <ranchorobbo at gmail.com>
To: <tentec at 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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