On Sep 24, 3:46*pm, Owen Duffy wrote:
Owen Duffy wrote in news:Xns9C913EF99FBC5nonenowhere@
61.9.191.5:

The authors have cobbled formulas from different places, and they do not
use a consistent meaning for S and d.

Sorry, I was wrong there, they are 'correct'... 276log(2*6/0.08) gives 600
ohms which is the correct answer.

Check that the graph you are referencing uses the same meaning for the two
dimensions.

Owen

Close one end and then measure the impedance. If you are making your
own you will eventually have to do it anyway to determine your
matching system