Re: [TenTec] Ten Tec 238A settings?

["Denton" <denton@oregontrail.net>]

Ahhhhhhh...success! Ran 600ohm feeders all the way to the tuner in the 
shack! Since there is no wiring in that part of the ceiling, I just screwed 
some cuphooks on the ceiling and suspended the feeders in them. Preliminary 
tuning is nice and smooth.
----- Original Message ----- 
From: "Denton" <denton@oregontrail.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, April 11, 2008 9:15 PM
Subject: Re: [TenTec] Ten Tec 238A settings?


> 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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