John KD5YI wrote:

According to "Reference Data for Radio Engineers", published by
International Telephone and Telegraph, fourth edition, page 35:

"Properties of Free Space"

Permeability = 1.257 * 10^-6 henry per meter.
Permittivity = 8.85 * 10^-12 farad per meter.

Characteristic impedance = sqrt(Permeability/Permittivity) = 376.7 ohms

John

My earlier citations of reputable sources were denounced as being an
intentional insult. I see that yours is simply being ignored. Perhaps
that's progress?

Roy Lewallen, W7EL