Coaxial Cable Capacitance

[-_nando-_]

Hi all !

Does anyone here know how much capacitance/m a coaxial cable (75Ohms), just like those that we use to extend our TV antenna, have??

I built a measurement microphone, and the cable impedance is pretty critical.


Best Regards !

 

[DcibeL]

there are many different types of 75 Ohm coax cable, but the majority that is used for cable TV transmission is this RG59 from Belden.

 

[sawreyrw]

The capacitance of a coaxial cable depends on the dielectric constant of the cable, but for 75 ohms is should be around 20 pF/ft.