[TenTec] Ten Tec 238A settings?

[Denton]

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 at oregontrail.net>
To: "Discussion of Ten-Tec Equipment" <tentec at 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 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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>
>
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