[time-nuts] Measuring coax temperature coefficient with a TICC

Will Kimber zl1tao at gmx.com
Wed Apr 19 22:33:58 UTC 2017


TV co-ax these days for satellite or UHF is almost all steel wire with
copper plating.  In fact the 'F' connector that is used is designed to
use that stiff wire as the center pin of the connector!


Will


On 04/20/2017 06:57 AM, Hal Murray wrote:
> kb8tq at n1k.org said:
>> 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 …). 
> Does that effect the propagation time?
>
> If I gave you a good scope picture of a pulse after going through chunk of 
> coax, could you figure out the ratio of copper to steel?  Would you need to 
> know the length or could you figure that out too?
>
>
>
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