Particularly if the cable / wire was made in say the last 10 years.   I've seen 
a LOT of magnetic supposedly 100% pure (oxygen free, of course) copper wire 
lately.  Much of it branded by companies with a reputation to lose.  It has  
gotten so bad, I now check the resistance of all the wire I buy with my 
HP-3458A.   A couple of local sellers now have me vet all their wire purchases. 
 I've seen wire with a resistance over 3 times what copper should be.   It's 
particularly scary to see that in wiring sold for mains wiring.

--------------------

> I’d want to be pretty sure what the center conductor was made out of. I’ve 
> seen some stuff
in coax that “one would think” should not be there (copper over steel …).
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