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Old May 2nd 06, 02:00 PM posted to rec.radio.amateur.antenna
John - KD5YI
 
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Default Wire diameter vs Impedance - correction

Reg Edwards wrote:
So, if Length / Dia equals e / 4 (about .67957), then C = infinite?


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C even goes negative for smaller values of Length/Dia.

I'll let you into a secret - the formulae are approximate and don't
apply when antenna length is less than about 5 times its diameter.

When was the last time you saw an antenna wire only 5 times longer
than its diameter?



You should supply your "secrets" along with your formulae.