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Tool Talk Discussion Forum

Need some soldering advice

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ebbsspeed

11-06-2004 17:22:57




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I'm not a novice by any means, but am looking for any ideas on the best way to make sure I get a good connection when splicing some of that old cloth-braided, rubber coated copper. It seems like the strands all have some kind of rubberish tar covering od something on them, and it takes a lot of heat and flux to clean the wire off in order to get a good solid splice. By the time I put that much heat to the joint, the insulation on the newer piece of wire I'm splicing in has melted back an inch or so from the splice, and I usually end up using a long piece of heat-shrink tubing to cover the melted insulation and splice. Does anyone have any tried and true methods on prepping this old cruddy stranded copper so that it will accept a good smooth flow of solder?

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SproutW

11-08-2004 15:33:16




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 Re: Need some soldering advice in reply to ebbsspeed, 11-06-2004 17:22:57  
Sounds weird, but I soak the ends of the copper wire in my bucket of carb cleaner over night. The next day the copper is clean and very bright. Like what was said earlier, clean wires makes the job much faster and easier.



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Big Jim

11-08-2004 01:28:54




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 Re: Need some soldering advice in reply to ebbsspeed, 11-06-2004 17:22:57  
Strip the bulk of the rubber off and then you some of the abrasive cloth like plumbers use on copper pipe to make the wire bright and shiny. It takes a lot of heat and time for flux to boil through the crud but clean copper will tin very quickly.



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Gerald J.

11-07-2004 07:57:32




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 Re: Need some soldering advice in reply to ebbsspeed, 11-06-2004 17:22:57  
Clean all those strands of the rubber covered wire. Straighten the twist, then scrape with a knife rotating the wire to a dozen or more positions. The strands will lay out side by side and with enough times around the wire you will clean the strands. Then twist them back together and tin with the other wire absent. When the rubbery wires tin well, then tin the new wire and solder the two wires together.

Gerald J.

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msb

11-06-2004 18:27:59




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 Re: Need some soldering advice in reply to ebbsspeed, 11-06-2004 17:22:57  
Have you tried using a heat sink.If nothing else put the wire in the jaws of a pair of sidecuts next to the insulation. Let the jaws absorb the heat from the soldering iron.An old wire stripper works well as a heat sink too.



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