It depends.

First, ONLY IF THE TRANSMISSION LINE IS TERMINATED IN ITS CHARACTERISTIC
IMPEDANCE: If the coax is 1/10 *electrical* wavelength, the delay is 36
degrees (360 * 1/10). If it's 1/10 *physical* wavelength (that is, the
physical length of the line is 1/10 of a free space wavelength), the
delay is 36/VF degrees where VF is the velocity factor.

IF THE TRANSMISSION LINE ISN'T TERMINATED IN ITS CHARACTERISTIC
IMPEDANCE, the delay of voltage and current won't be the same and,
depending on the load impedance, both can be very different from the
delay when the line is terminated in its characteristic impedance. The
voltage and current delays can be known only if the characteristic
impedance of the line, the impedance of the load, and the electrical
length of the line are known(*).

(*) Actually, you only need to know the ratio of the load impedance to
the line's characteristic impedance and not their actual values.

Roy Lewallen, W7EL

ik3umt wrote:
Hi all,

What's the delay (in degrees) 1/10 lambda coax (for a given freq.)
introduces considering its velocity factor ??