Topband: Antennas

DAVID CUTHBERT telegrapher9 at gmail.com
Thu Dec 13 07:52:11 EST 2012


Some of us have little choice for low band antennas. I am currently using a
Tarheel 200A screwdriver antenna with a 24' whip in an HOA neighborhood.
That gives me a 30' base loaded vertical over 90 radials (12 to 24 ft
long). The input impedance 160 meters is 13 ohms and with a radiation
resistance of 1.3 ohms the radiation efficiency is 10%. With 500 watts I
have worked all continents and have fun on top band. While I don't have a
big signal the real problem the S-9 receive noise.

    Dave WX7G


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