Use an antenna analyzer!

At 1/8 wavelength, from either a short or an open, the input impedance
will be purely resistive. The resistive value is the Zo of the line.

DD, W1MCE

Jack Twilley wrote:

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This is a little bit off the original topic, but I have a question.

Given two unmarked pieces of coax, how do you determine if they're "50
ohm" or "75 ohm" or whatever? Shorting them doesn't work.

Jack.
- --
Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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