You might want to try my XMatch(tm) antenna tuner.
See March 1997 QST and my ad on page 154.
73 Paul N4XM
At 07:28 11/4/1997 -0600, Mike Michon wrote:
>Dear Antenna Experimenters,
>
>For the 160 meter Contest in December we install a 1/4 wave balloon
>vertical on a ridge in southern MS. We feed it with open wire line. A run
>of about 700-800 feet. We have been using a Nye Viking tuner, but it isn't
>real happy at times. Two years ago we had to add a small coil to tuner to
>get it to work. Last year one of the fixed capacitor plate insulators
>failed, and we repaired it with some sort of plastic we found. We have been
>running 500 watts, but may be able to run 1500 watts this year and I don't
>know if the tuner is going to take it.
>
>So, is it possible to match this arrangement so we can eliminate the
>tuner?? If so will we be able to have a broad enough match to accomodate
>how spread out the band gets during the contest??
>
>If we continue to use the tuner, can we do anything to make the match
>closer to what the tuner can handle?? We usually have 40 60 radials of
>various lengths for ground, and I think the soil in southern missiissippi
>would be poor ground, although we are only about 15 miles from the
>mississippi river, but I am not real sure of ground conductivity.
>
>Would a balun at the vertical do any good as far as matching. The feedline
>is usually about 6 inches apart so I am guessing about 500-600 ohms for it,
>but we can space it closer if necessary or beneficial.
>
>Mike Michon
>AB5XP
>44033 Hwy. 42
>Prairieville, La 70769
>michon@eatel.net
>
>--
>FAQ on WWW: http://www.contesting.com/topband.html
>Submissions: topband@contesting.com
>Administrative requests: topband-REQUEST@contesting.com
>Problems: owner-topband@contesting.com
>
>
--
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