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[TenTec] OT Antenna Tuners

To: tentec@contesting.com
Subject: [TenTec] OT Antenna Tuners
From: Jim WA9YSD <wa9ysd@yahoo.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 9 Jul 2008 06:00:35 -0700 (PDT)
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Some people like but radios cause they look for the one that operates well and 
has a nice feel to it or how it looks or what ever.

I have gone through 6 different tuners and used a bunch more along with home 
brews over the years and built two of my own.  Each one has its own feel, looks 
and operating characteristics.  One I built that came out of the ARRL Hand Book.

I do not like one that if you just tap on the knob that adjusts the caps the 
tuning needs to be readjusted.  Ground conditions change and a daily basis and 
you need to tweak settings all the time.  Roller inductors so tight that you 
need a crank handle to turn it and not a figure knob to spin it.  Or a roller 
inductor that when you just tap on the knob the tuning needs to be readjusted

I like a roller inductor when I spin the dial it moves at least a half a turn 
when I stop.

Some tuners are broad band, while others are narrow.  Some have a bit more band 

I have yet to see a consumer tuner sold that indicates or automatically finds 
that SWEET SPOT so you need to do minimal or no tuning at all when changing 
from SSB to CW portion of the band or just changing bands when using the same 
antenna with minimal tuning.

 One of the things I like about the Ten-Tec 253 Auto Tuner is that it finds the 
lowest SWR at the proper Q.

I have not learned how to find the proper minimal SWR at the proper Q with a 
manual tuner.  It was all ways trial and error.  For the most part I start with 
the caps at mid range, roller inductor  3 turns off the bottom, and work from 

Keep The Faith, Jim K9TF/WA9YSD

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