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Old 17th March 2007, 03:49 PM   #1
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Question Coaxial Cable Capacitance

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.


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Old 17th March 2007, 04:06 PM   #2
DcibeL is offline DcibeL  Canada
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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.
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Old 17th March 2007, 04:13 PM   #3
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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.
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