Jim:
If you're cooking those capacitors in the 238, you should check this article
on my website:
http://n6ie.com/Ten_Tec_238.html
If you look at the last two pictures, you can see where the old caps had
been letting out their "magic smoke"!
Ron N6IE
www.N6IE.com
----- Original Message -----
From: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, December 29, 2009 11:09 AM
Subject: Re: [TenTec] T-New Work settings
> On Mon, 28 Dec 2009 18:50:28 -1000, Ken Brown wrote:
>
>>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.
>
> Thanks Ken. You're right, of course. Your post made me return to the
> manual
> and open up the box to look at the second inductor, which is 5
> close-spaced
> turns of THHN around the (non-conductive) bandswitch shaft. Although I own
> six of these tuners, I'd never studied them that closely, except to
> replace
> blown caps and try to restring dial cords. :)
>
> 73,
>
> Jim K9YC
>
>
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