May not need the Tek TDR. The RigExpert AA-170 has a very good TDR function
that would be able to tell where the discontinuity point is in the coax. No
idea if the Comet device has this functionality, but it’s worth a look.
Jack B, W6FB
> On Dec 15, 2014, at 1:58 PM, Richard Solomon <dickw1ksz@gmail.com> wrote:
>
> If you can find a TDR, like a Tektronix, you can see where the defect is.
>
> 73 es HH, Dick, W1KSZ
>
> On Mon, Dec 15, 2014 at 12:19 PM, Ray Benny <rayn6vr@cableone.net> 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...
>>
>> Ray,
>> N6VR
>>
>> On Mon, Dec 15, 2014 at 11:09 AM, Tom Osborne <w7why@frontier.com> wrote:
>>>
>>> Hi Patrick
>>>
>>> Don't think I'd cut them in half.
>>>
>>> I'd just cut the plugs off and replace them and check the cable again.
>>> Might be something in the plugs that are bad and you would be wasting a
>>> bunch of cable.
>>>
>>> If still bed, then start cutting them. 73
>>> Tom W7WHY
>>>
>>>
>>> On 12/15/2014 8:09 AM, Patrick Greenlee wrote:
>>>
>>>> I'm going to cut the bad jumper in half and test the halves and then cut
>>>> the bad piece in half and test those pieces. Whichever is bad will
>> then be
>>>> dissected carefully to see, if possible, what was physically wrong with
>> the
>>>> coax. This is a real head scratcher for me. The good news is I'm back
>> on
>>>> the air with a pan adapter full of signals again and loving it.
>>>>
>>>> Patrick NJ5G
>>>>
>>>
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