Thread: vertical over real ground
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Old February 13th 09, 03:02 AM posted to rec.radio.amateur.antenna
Roy Lewallen Roy Lewallen is offline
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First recorded activity by RadioBanter: Jun 2006
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Default vertical over real ground
wrote:
Trying to design a 13' vertical with a loading coil at 3'. It will be
mounted on an aluminum tool box on a pickup. I modeled this on EZNEC
and came up with loads to resonate on 14.2 and 7.2 mhz. Wind the
coils with calculated inductance and it is way lower in frequency than
predicted.

Tapped up the coils and eventially got matches, but was wondering why
the design and real world are so far apart?

Gary N4AST

It sounds like the model of the pickup was inadequate -- it's at least
as important as the vertical. How did you model it?

Roy Lewallen, W7EL
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