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Old 8th May 2017, 10:32 PM   #1
wanders is offline wanders  United States
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Default Soldering double shield coax

I purchased some Belkin 1505 double braided shielded coax to make new interconnects. Thought I would twist both shields together to connect to one end RCA jack. (As opposed to connecting only one of the shields.) Any different opinions?
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Old 9th May 2017, 01:36 PM   #2
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Connect both shields at both ends. The lower the end-to-end resistance of a RCA unbalanced interconnect coax the better.

Bruno Putzeys suggested double or triple shields on coax cable well over a decade ago.
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Old 9th May 2017, 01:54 PM   #3
wanders is offline wanders  United States
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Quote:
Originally Posted by Speedskater View Post
Connect both shields at both ends. The lower the end-to-end resistance of a RCA unbalanced interconnect coax the better.

Bruno Putzeys suggested double or triple shields on coax cable well over a decade ago.
Appreciate the response. I had always heard to connect to one end only.
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Old 9th May 2017, 05:29 PM   #4
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Bruno Putzeys wrote:

Take a coaxial cable, take the jacket (sheath) off and dress it in a number of extra layers of shield salvaged from other cables.

But that's overdoing it.
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Old 9th May 2017, 05:35 PM   #5
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^ It'd be simpler just to go balanced and be done with it! Is the OP talking about twisted pair screened cable?
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Old 9th May 2017, 06:30 PM   #6
kaputt is offline kaputt  Germany
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Quote:
Originally Posted by wanders View Post
Appreciate the response. I had always heard to connect to one end only.
When you have a coax cable and connect the shield(s) to one end only you have no current return path -> no signal flow.

The "connect to one end only" thing only works with a two conductor cable that has an extra shield around.
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Old 9th May 2017, 08:25 PM   #7
wanders is offline wanders  United States
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Originally Posted by kaputt View Post
When you have a coax cable and connect the shield(s) to one end only you have no current return path -> no signal flow.

The "connect to one end only" thing only works with a two conductor cable that has an extra shield around.
Duh, I knew that.
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Old 9th May 2017, 08:50 PM   #8
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Aren't the shields in contact?
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Old 9th May 2017, 09:36 PM   #9
wanders is offline wanders  United States
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Aren't the shields in contact?

The wire has not been delivered yet; from the pictures, the two braided shields appear to be in contact. With other braid/foil cables I have seen, the two shields were in contact.
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Old 9th May 2017, 09:44 PM   #10
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Yes, that's what it looked like to me in the picture I found. I think if you try twisting them both together, from a practical point of view there may be too large a mass of copper to solder successfully.
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