Hi,
For a whip, much shorter than a quarter wave against a poor
ground - who knows? However, you want a number?
So here's a number; 2 - j500 and it won't be too far wrong.
The name of the game in such a situation is "Suck-it and see."
Make an intelligent guess at what the impedance is likely to
be, rig up a far-field meter and adjust the tap/link/network
until it peaks. Then go out for a curry and maybe a drink or two
or...
Alternatively, buy an antenna book and RTFM :-)
Cheers - Joe
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