I have heard it given as, "speed of light times mu naught."

However, I have not examined proof of this, and actually, that is claimed to
be the impedance of space itself (a vacuum), "air" maybe slight different.
Anyway, I adopted it simply because it seems to be accepted--do a "google
search" with the search terms:
[ impedance either 377 ohms ]
You will either find your proofs there, or not....

Warmest regards,
John

"Bob Miller" wrote in message
...
| On Fri, 29 Apr 2005 22:07:51 -0700, "John Smith"
| wrote:
|
| My antenna seems to match the impedance of my transmission line (50 ohms)
to
| the impedance of the either (370 some-odd-ohms), isn't that a balun?
|
| Regards,
| John
|
|
| How did you compute the impedance of the "either"?
|
| bob
| k5qwg
|
|