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In Reply to: Hate to burst any bubbles, but...... posted by unclestu52 on July 15, 2006 at 00:33:37:
I have heard this before, as well as that Oxygen free copper is not quite true.Purity is way down on the list if it makes it at all.
I have made some cables with wire I know is not 4n and it sounded great.
BTW, do you have any recommendations for cleaning the wire before I insulate it?
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Follow Ups:
Actually OHFC is a certifiable copper grade. Basically, it involves eliminating the molecular gas that enters copper when in the molten state. Some apparently cast the ingots in a vacuum, and some claim that the cryogenic treatment can create similar effect since the intense cold contracts the metal, thus 'squeezing' out the dissolved gasses.At any rate, I would simply wipe the bare wire with alcohol, to insure an oil free surface, particularly skin oils, and then insulate. There is a product made by the Cortex company which greatly impedes metal corrosion. It is sold in many hardware stores under the Bullfrog name. I use the foam strips which you simply place in your component chassis. The strips contain an amine based chemical which slowly leaches out and coats the metal retarding corrosion. They also sell it in liquid form (expensive!). My guess is that you could buy the foam and wipe down the wire with it before insulating and get similar results.
It forms an invisible coating, and is highly effective. We tried an experiment by coating one of two copper clad PCB's and leaving them out on the patio for a few months. The coated one turned darker but was still shiny, while the uncoated one was turning green.....
YMMV, of course...
Stu
So there iw no need to use silver polish or put it in water with aluminium?Just alcohol ( will rubbing alcohol work)?
I use the 90% pure stuff (actually I buy 100% isopropynol now). The 70% pure stuff has a bit of a perfumant added!
This looks good.
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