Someone sed:

"So, the 300/75/50 ohm term, characteristic impedance, is the square root of
L/C"

This is an *approximation* that is useful when complex arithmetic is over the
capability of your calculator or if the imaginary components of the formula for
Zo are negligible.

At the usual HF through UHF ham frequencies the imaginary components are
negligible so the approximation suffices.

UNITS: 10-pF capacitor. 10-pF is hypenated when used as a modifier, i. e.,
adjective.

Others: 10-ft pole, 5-cent cigar, 2-dollar pistol, 12-V battery, 500-mile
track.

73 de Jack, K9CUN