On 17 jun, 18:25, John Smith I wrote:
TWIMC:

I have been using the following formula to find the self-inductance of a
whip in free space:

4l
L = 5.08*l(ln---- -1)
d

Anyone have a more accurate equation?

Also, I need to compute the self-capacitance of a whip. Anyone have a
reasonably accurate equation for such?

Regards,
JS

Hi John,

Your formula requires: no ground or other conductors present, uniform
current distribution along length of conductor, no other currents
present. The formula is only valid when all magnetic field is
generated by that wire segment only. This is practically
impossible.

Are you looking for an LC or transmission line model that is valid
(for example) around a halve wave or quarter wave length?

Best regards,

Wim
PA3DJS
www.tetech.nl