What is the difference in structure or material between 50Ω and 75Ω digital cables?

Tinkering
1

I have a question to you, what is the difference in structure or material between 50Ω and 75Ω digital wires? It is best to have pictures to show.

2

“The characteristic impedance of the coaxial cable (in Ohms) is determined by the dielectric constant of the inner insulator and the radii of the inner and outer conductors.”

Wikipedia quote illustrated here:

http://cablesondemandblog.com/wordpress1/2014/03/06/whats-the-difference-between-50-ohm-and-75-ohm-coaxial-cable/

3

It’s not a difference of construction, or dielectric material, it’s the ratio of the center conductor radius to the screen diameter. 176pi * R / D sticks in my mind, but I might be wrong. The characteristic impedance Is usually printed on the cable sheath, or look up the cable marking, it’s hard to “guess” it.

4

As Mike says above, look for the marking and then look the cable type up here in the Standards section:

5

Thank you very much for your answers