[TenTec] T-New Work settings

Ken Brown ken.d.brown at hawaiiantel.net
Mon Dec 28 20:50:28 PST 2009


> That's all very nice, BUT -- the Ten Tec 229 and 238 tuners are L-
> Network tuners, NOT T-Network tuners. Rather different animals, and 
> the L is a generally better behaved one. 
>   
If that was exactly true, there would be only one setting that would 
work. The 238 is not exactly an L network. It is actually a T network 
with two inductors and one capacitor. One of the inductors is very 
small, and in most cases is so insignificant that you can consider the 
238 to be just an L network. In situations where the match is already 
very close on the lower bands, or on the higher bands, either case using 
very little C, you can find a match with either the big inductor at the 
input or at the output. This would be Low Z position 1 or High Z position 1.

If this were not the case, Jim's earlier post regarding trying both 
possible settings would be incorrect. Only one setting could ever work.

DE N6KB


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