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Have trouble soldering A/N silver leads
Have trouble soldering A/N silver leads
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Old 9th June 2012, 05:04 PM   #1
YouAgain is offline YouAgain  United States
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Default Have trouble soldering A/N silver leads

I use a pair of tiny I/V transformers between dac chip and the gain stage in my DAC. The transformers are silver wire wound. When building I had an awfull time trying to get a good solder bond to the silver. I use a hot iron and Wonder solder. I thought perhaps there was a hidden clear coat to the wire and scrapped the strands with an exacto knife. I got a bond but not very good. Now Years latter, I'm changing the output stage to another type. I'll need to solder these leads again and would like to do it right. Doese anybody have any ideas?
AN kits where no help at all. I've called and emailed 6 times over the years and never got a single reply. Not sure what kind of coating is on the strands.
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Old 10th June 2012, 06:00 AM   #2
PlasticIsGood is offline PlasticIsGood  United Kingdom
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I think you should use silver loaded solder for silver wire but that might not explain your problem. "Wonder" solder may have the wrong flux, or too low a melting point, so the flux isn't active enough to clean the silver.

Whatever. Try a multicore solder that's got some silver in it, which should be available from most electronics suppliers. It will probably have a different flux. Clean as much lead solder away from the joint as you can beforehand. Don't try jewellers' silver solder because I think that's for brazing.

If you ask a supplier for advice, they will probably help.
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Old 13th June 2012, 01:10 AM   #3
YouAgain is offline YouAgain  United States
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I really think that Audio Note is doing some kind of Litz wire with this since that's what they do with some cables. That means there is an insulating coating on the strands. I need to know what is the correct way to remove it. It's not enamel. I've soldered plenty of pure silver and silver plated wire in my projects with this "Wonder" solder ( which has some silver content). I'm reluctant to take a flame to the wire and I'm not going to buy a 900 degree F. solder pot. Does any one have any ideas?
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Old 13th June 2012, 01:22 AM   #4
jordheis is offline jordheis  United States
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Have trouble soldering A/N silver leads
Default abrasives

wet or dry silicon carbide paper works for removing polyimide coating, so consider that approach for your situation.
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Striving to remove some ignorance every day (always starting with my own)
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