The input impedance of any 5/8ths-wave whip or rod antenna is
approximately -

R - jX = 100 - j 350 ohms.

At 29 MHz, the bottom-end loading coil consists of 10 turns wound on a 1"
diameter, 1" long former.

This and information on other antenna heights can be found by downloading in
a few seconds program BOTLOAD2 from website below and running immediately.
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Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
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