On Wed, 29 Oct 2003 04:42:45 GMT, "BuckEye" wrote:


"Lancer" wrote in message
The number (.91 to .99) are correct for the difference between an
antenna in free space and erected near earth. Its not from the
velocity factor of the antenna.
Its because the antenna is close to the earth and other
conductive objects (tree, buildings and power lines) which present
stray capacitance that tunes the antenna lower in frequency than a
free space antenna. Its called "end effect" and is more prevelant
the closer an antenna is other objects.

If so how do you explain in some long wire antennas its even 1.05 times
longer than the freespace.



I guess you need to tell me what longwire antenna you are referring
to. The end effects only operate on the end sections of the antenna,
in the parts on the antenna the effects are absent, and the wire
length is approximately that of an equivalent length in free space.