On Sat, 14 Nov 2009 12:05:21 -0600, "amdx" wrote:

Hi All,
I'm having a disagreement about the use of this folded dipole calculator
impedance calculator.
http://www.k7mem.150m.com/Electronic...ed_dipole.html
We are using it to calculate the impedance of folded dipoles to drive a
yagi.

Excuse me, but what does such simple dipole calculator have to do with
the calculations for a Yagi feed element ?

Even assuming a single element feed element antenna, playing with the
tube diameter (upper and lower bars) or the number of bars in a folded
dipole will radically change the feed impedance.

Paul