Dave
According to the chart in the ARRL Antenna handbook lengths to avoid for 40M
are 58 to 73 feet and 123 to 150 (for ungrounded guys). Also avoid odd 1/4
wave multiples for grounded segments.
It gets a lot more complicated if you add antennas in the future.
73 de Bill
K2EK
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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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