[time-nuts] Thermal effects on cables

Bob Camp kb8tq at n1k.org
Mon Jan 23 22:01:38 UTC 2017


Hi

Back a long time ago the people I was working with spent time looking
at the impedance of a variety of coax cables. The data they came up
with on some varieties of cable would suggest that cable is not an outlier…

Bob


> On Jan 23, 2017, at 3:08 PM, jimlux <jimlux at earthlink.net> wrote:
> 
> On 1/23/17 9:16 AM, Bob Camp wrote:
>> Hi
>> 
>> Nothing is ever simple if you dig deep enough:
>> 
>> http://www.jensign.com/RG58U/
>> 
>> http://www.cliftonlaboratories.com/the_curious_case_of.htm
>> 
> 
> here's my guess on the curious case cable: it was mismarked by accident at the factory (e.g. 93 ohm coax, marked as 50 because someone forgot to push the button on the marking machine), and dumped in the scrap bin, and then sold by someone who bought the surplus and just read the markings.
> 
> Or, even sold as a whole spool, likely at a discount, to a "knowledgeable buyer" who was willing to take it, mismarkings and all.
> 
> 
> 
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