Richard Harrison wrote:
The actual impedance of the 1/4-wave folded dipole is an inverse
function of the wire diameter. It can be chosen to present 6000 ohms.
If the 1/4-wave folded dipole is a little short of 1/2-wave around its
perimeter, it presents an inductive reactance. If a little longer
electrically than 1/2-wave around, it presents a capacitive reactance.
Using EZNEC, I just did a frequency sweep on a #14 folded dipole
around half its design frequency. There were no apparent resonant
effects. How big does the wire have to be for a 130ft folded dipole
to exhibit a feedpoint impedance of 6000 + j0 ohms on 160m? Why is
no one using such an antenna on 160m?
--
73, Cecil
http://www.qsl.net/w5dxp