My situation happened in the late 60's when I lived in Africa. No such
equipment was available then.
Now, no problem, most of us have such equipment...
Ray,
N6VR, ex ZD3G
On Mon, Dec 15, 2014 at 6:50 PM, Jim Lux <jimlux@earthlink.net> wrote:
>
> On 12/15/14, 11:19 AM, Ray Benny wrote:
>
>> Patrick,
>>
>> I had a case once of a shorted coax due to a manufacturing defect. The
>> coax
>> was a 100 ft piece. I had first cut off the connectors one at a time but
>> found the coax still shorted. I cut the coax in half, one half open, the
>> other shorted. I kept cutting the shorted section in half until I had
>> about
>> a 6 inch shorted piece remaining. I slid off the braid and found that
>> during the manufacturing process the center conducted was bent outward and
>> through the dielectric causing a direct contact with the braid. Don't know
>> why the short was not caught in a QC check, but maybe only random
>> pieces/rolls were checked.
>>
>> In the end, I still had 50ft of coax to use, plus a bunch of shorter
>> pieces...
>>
>>
>
> That's why a TDR or a VNA or equivalent that can tell you the position of
> the discontinuity is useful. You'd know right away if the problem is in
> one connector or the other, or in the middle of the cable.
>
> If you were real patient and had lots of time, you could do it with a SWR
> meter and tuning your rig around.
>
>
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