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Old 14th June 2004, 03:47 AM   #1
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Default Silver wire for transformer - where to find?

Hello All,

I intend to wind my output transformer using silver solid core or plated wire. Any one know where I can find readily insultate siver wire that i can use for tranformer winding?

Any other experiences sharing would also be appreciated/

Sandroff
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Old 14th June 2004, 10:42 AM   #2
p2mine is offline p2mine  Romania
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it' cheaper to use only silver plated wire because the performances are almoust the same. and electrons flow only on the surface of the conductor.
usually silver-plated wires are used in RF frequencies because of theyr low resistance.

you could do yourself some silver-plated wire using the tecnique i'll describe here.
you need:
1. copper wire the size(length and diameter) you need
2. some CuSo4 solution (you can find this at chemical supply stores)
3. an old silver coin or any other silver thing.
4. a supply source (12v 5A should be enough)

all the isolation laquer shold come down from the wire. a easy wat to do this is to put some high current flow into the wire, heating the wire and destroying the laquer.(or just burn it with a flame).
then, with a abrasive paper clean the wire.
after this is done, make a solution of CuSo4 (10-30% concentration) in a plastic recipient (if it is from steel it will react with the solution)
wind the copper in a diameter a bit larger than the coin you have.

the positive electrode should connect to the wire and the negative electrode should connect to the silver coin.(i don't remember quite well, but the electrons flow from - to + ... I think)

Click the image to open in full size.
put the ansamble inisde the CuSo4 solution.
you have to watch for the silver to be on equal deposit on the wire surface. eventualy change the position of the coin.
after you consider you have enough siler on the wire(about 10-30 min) take of the wire and wait for it to dry. with a very smooth abrasive paper clean the wire.(don't waste the silver, it's not very cheap!)
a silver coin would be enogh for several times to use.
with this metod you can deposit silver on copper wires. the only problem is that you have to be carefull when you are winding the transformer not to make short-circuits. this wire is not isolated.
it's not hard, but after a few times, you'l do it the way you wish.
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Old 14th June 2004, 12:24 PM   #3
hacknet is offline hacknet  Singapore
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is 925 silver used in jewelery okay?
i don`t know where to find 100% silver coins to do the job
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Old 14th June 2004, 01:21 PM   #4
tiroth is offline tiroth  United States
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Considering the low price of silver-plated copper wire, I don't understand the reason to DIY unless you needed some particular formulation or thickness that wasn't available commercially. It's neat, just not terribly useful. Especially in the case of a transformer, where you need hundreds of feet of *insulated* wire.

Now, where this little trick might come in handy is silver-plating bus bars or other components that come in Cu but might be desirable plated.
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Old 14th June 2004, 03:33 PM   #5
p2mine is offline p2mine  Romania
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well, here you cannot find insulated plated silver wires...
so you must do-it yourself.
indeed, this trick does-nt work for undreds of feets of wire, but for a transmission line of 10 cm is ok.
I never taught of the purity of the silver you have to use...
I have some coins that are ok for this job.
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Old 14th June 2004, 03:35 PM   #6
hacknet is offline hacknet  Singapore
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what currency uses silver coins? singapore only uses brass.
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Old 14th June 2004, 11:46 PM   #7
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Hi Sandroff,

Try California Fine Wire. I purchased a roll of 24 AWG teflon coated 99.99% silver wire from them for about US$1.20 per foot. The teflon coating, for its part, is thin and possibly thin enough for use in transformer winding (oooh!). California Fine Wire can coat silver wire with pretty much any coating to your specifications.

This thread might interest you:

Teflon insulated magnet wire?

Tom
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Old 15th June 2004, 12:14 AM   #8
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Hi,

This is the same wire used in the Audio Note U.K. Ag wire OPT/xformers among others:

DESKADEL.

Look under "Accessories".

If the diameter you're looking for isn't on the list it can be ordered straight from the factory.

The man behind the operation, mr. De Laet is travelling extensively so be patient or look at the dealer list on the same site.

The Ag should be of 5 N purity at least so coin silver is no good.
Neither is Ag plated Cu as it doesn't yield the same sonic results, nor is jeweler silver for that matter.

BTW, the wire is cryogenically treated directly at the factory directly before spooling.

Cheers,

P.S. For really deep pockets, there's also pure gold and gold alloys....
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Frank
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Old 15th June 2004, 02:41 AM   #9
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Default Thank you guys

Guys,

Thank you for the timely suggestions. I think i can live with silver plated readily insulated wire if that is available. I am not confident that I have the knowledge to do my own plating however.

I went to some of the sites suggested and their offering seems rather promising.

However, I have difficulty getting into the:
http://www.freewebs.com/deskadel/

It seems to be a restricted area is there a contact email or tel/fax number that I can use?

Sandroff
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Old 15th June 2004, 02:46 AM   #10
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Hi,

Quote:
However, I have difficulty getting into the:
That's odd...It works fine for me.

I'll send you the details with everything you need to know.

Cheers,
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Frank
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