Ten feet is a bit low for tuning. A 40 meter dipole tuned at 15-20 feet
will resonate about 10-15 KHz higher at 78 feet.
Keith WD5DXL
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Van Fair
Sent: Sunday, June 06, 2004 5:47 PM
To: towertalk@contesting.com
Subject: [TowerTalk] swr for 40 meter rotatable diopole
Which way should the resonant frequency go as the height above ground is
increased for a 40 meter rotatable linear loaded diopole. If the swr is 2.0
to 1 at 7200 with the length set for 7200 10 feet above ground will the
resonant frequency go up or down as the antenna height is increased to 78
feet or will it stay at 7200 with just a lower swr. thanks for any help.
Van W4GIW _______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
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