Topband: 4 new radials...

Jim Brown jim at audiosystemsgroup.com
Thu Feb 9 20:22:11 PST 2012


On 2/9/2012 6:12 PM, Jim F. wrote:
> Using measured capacitance between the two conductors
>   of my cable ( 24pf / ft.) it was easy to calculate the lengths of 
> cables going to the other 3 condos.

At what frequency did you make that capacitance measurement, and how did 
you make it?  When the frequency is high enough that the cable you are 
measuring is longer than about 1/20 wavelength (taking Vp into account), 
the behavior of the cable as a transmission line will cause measurement 
error.

73, Jim K9YC


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