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Re: [TenTec] OT Antenna Tuners

To: tentec@contesting.com
Subject: Re: [TenTec] OT Antenna Tuners
From: Jim WA9YSD <wa9ysd@yahoo.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 21 Jul 2008 03:41:31 -0700 (PDT)
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Only up to 21 MHZ, is because of too much inductance.

Unun must be acting like a old fashion link coil with out the link.  I did 
something like that with a single coil and had 3 pairs of taps.  One pair of 
taps for input, one for caps and one for the roller inductors.

I did not know that any one made a 4:1 unun balun.

You took and installed a 1:4 unun on the input.  That should be 200Ohms to the 
L- match and 50 ohm out to the coax line of the antenna.  Do I have that right 
or is it a 1:4 then 4:1 making it a unun on the input, then to the L-Match?

You got more band width out of the tuner.  Now why is that?  L- Match is rather 

Making up a 1:4:1 unun is easily done Just on the input side of the tuner with 
out taking the tuner a part.

You mush have float the ground on the tuner?  Did you ground one side of the 
unun on the 4 side rather than the 1 side?

 Keep The Faith, Jim K9TF/WA9YSD

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