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Re: [TenTec] What makes the 238 good or any other tuner good?

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] What makes the 238 good or any other tuner good?
From: "Scott Harwood" <scotth@hsc.edu>
Reply-to: scotth@hsc.edu,Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 20 Jan 2006 18:23:01 -0500
List-post: <mailto:tentec@contesting.com>
AMEN
Scott K4VWK
---------- Original Message ----------------------------------
From: "Gary Hoffman" <ghoffman@spacetech.com>
Reply-To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date:  Fri, 20 Jan 2006 14:39:31 -0500

>((Some content deleted))
>
>Your point is that the better the feedline, the lower the losses, and open
>wire feedline is best.
>
>All true and I totally agree.
>
>The point is, if you use the very best feedline you can, you can limit
>losses and have the tuner in the shack and all will be well.
>
>73 de Gary, AA2IZ
>
>
>----- Original Message ----- 
>From: "Michael Tope" <W4EF@dellroy.com>
>To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>Sent: Friday, January 20, 2006 6:33 AM
>Subject: Re: [TenTec] What makes the 238 good or any other tuner good?
>
>
>> ----- Original Message ----- 
>> From: "Gary Hoffman" <ghoffman@spacetech.com>
>>
>> >I think the point being missed here by one of the posters is that if the
>> > feedline is really excellent....like the 1/2 inch Heliax, or perhaps 450
>> > ohm
>> > transmitting ladder line, or less radically, perhaps Times Microwave
>> > LMR-400, the losses in the feedline are trivial, no matter the
>mis-match.
>> >
>> > Then having the tuner in the shack is extremely handy, and results, as
>> > indicated, in only trivial losses.
>> >
>>
>> Yes and no, Gary. Using good coax certainly helps, but as the
>> feedpoint impedance gets very high (like what you get when
>> operating a 1/2 wave dipole on an even harmonic) then losses
>> skyrocket even with very good 50 ohm coax, whereas the losses
>> stay relatively low with open wire line. The program TLW that
>>
>
>
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