A

#### amdx

- Jan 1, 1970

- 0

I'm having a disagreement about the use of this folded dipole calculator

impedance calculator.

http://www.k7mem.150m.com/Electronic_Notebook/antennas/folded_dipole.html

We are using it to calculate the impedance of folded dipoles to drive a

yagi.

When entering data it asks for "Simple dipole feed impedance (ohms)"

Default is 72 ohms. This assumes a 1/2 wave dipole.

The fellow I'm disagreeing with say's,

"the reason that the variable in the calculator for the "dipole feed

impedance"

could be if you want to transform the z to something else, such as 50 ohms."

I don't even understand what he means.

I can only think of one reason to alter the 72 ohms, that would be if you

use a a different length folded dipole.

I'll readily admit the other fellow knows more about this than me, but

I need more convincing

Can anyone explain this to me.

Thanks, Mike