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Old 23rd June 2010, 10:40 AM   #11
mavric is offline mavric  United States
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just my three cents, from what I understand, get a speaker, a regular speaker, stick the coil in the oven or just get it warm to the touch, unwind it and measure it. Alot of stereo or audio stores throw the old or used ones away, which for you would be free material. If the coil is brown, do not use it, if it still has the red protective glue, just be careful, that as i understand should be what you are looking for....insulated wire. correct?
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Old 23rd June 2010, 11:38 AM   #12
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hi mavric
i was thinking magnet wire but it would be hard to tension i rekon

ive just been looking at some 2mm hard drawn piano wire that would be nice
it comes in 900mm lenghts which is perfect ,its also straight too so would not need to be tensioned just sprayed with hv varnish

its pricey though 50 lengths is $60au and at a quik calc i would need 500 to do the 4x acorn panels so cost would be $600 smackers , too much to risk a stuffup so im not sure which way to go yet

i am open to suggestions but

regards sheafer
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Old 24th June 2010, 12:06 PM   #13
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Hi sheafer,

why don't you take 2mm welding rods? They are cheap,
and as you buy a whole packet of them, they are straigt!
Then you go to a place where they repair electric motors
(or transformer winders),
they have laquer that can withstand high tension.

Regards
Frank
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Old 24th June 2010, 12:46 PM   #14
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Quote:
Originally Posted by frank ziel View Post
Hi sheafer,

........welding rods ...............

Regards
Frank
What material ? Would the ones used for brass be good ? I'm thinking of corrosion of the stators if they are made of iron or alloys.

About using enamelled copper wire used for transformers ( magnet wire ) , you can remove enamel very easily using a stripping liquid that is available in the market. You need to be careful with it as like most solvents it's hazardous if used carelessly. I have used it and it gives a very clean copper conductor. No scraping at all.
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Last edited by ashok; 24th June 2010 at 12:53 PM.
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Old 24th June 2010, 02:28 PM   #15
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Quote:
Originally Posted by ashok View Post
What material ? Would the ones used for brass be good ? I'm thinking of corrosion of the stators if they are made of iron or alloys.

About using enamelled copper wire used for transformers ( magnet wire ) , you can remove enamel very easily using a stripping liquid that is available in the market. You need to be careful with it as like most solvents it's hazardous if used carelessly. I have used it and it gives a very clean copper conductor. No scraping at all.
Why would not one use welding wire for MIG welders. Copper coated mild steel. Comes in bobbins. Can easily be straightened. Different diameters are on avail. Decent price.
McMaster-Carr
Alex
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Old 24th June 2010, 03:25 PM   #16
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Hi all,
these copper plated mild steel wires are very straight indeed.
I would not buy them at Masterc.. - there are shops selling welding material...
And when laquert why shell they corrode?
Do have your ESLs in the Garden?
Regards
Frank

Last edited by frank ziel; 24th June 2010 at 03:29 PM.
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Old 24th June 2010, 10:43 PM   #17
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hi all
great suggestions from every one
re the mig wire ,this would be the best price and work well but it would need some tension to use and get straight so a tension jig would still have to be used

re the 2mm welding rods ,these are perfect though are a little harder to get in longer lengths .i would need 900mm min ,i would also need some that could be soldered to for connection aside from that they look to be a good solution

i have also found some anti corona/insulating varnish in a spray pack from rs components it is rated at 40kv mm so is perfect for insulating stators

i still have not got my present from er audio yet ,fingers crossed for today so i can have a look at the frames and see if the wire stators will be easy or hard

regards sheafer
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Old 25th June 2010, 07:42 AM   #18
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Hi sheafer,

I do not mean MigMag/Wig welding material - I mean the ones
you need for autogenous welding - here they are 1000mm long
and are available in different diameters.
If used - be shure that the glue (epoxy is good)
coverts more than half of the diameter at the support bars,
because the copper-plating is not galvanised,
so has not a very strong cohesion!

Good luck,
you will be suprised how wonderful the result will be!

Regards, Frank
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Old 25th June 2010, 08:21 AM   #19
Calvin is offline Calvin  Germany
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Hi,

actually its very easy but unfortuantely very time consuming to get wire perfectly straight.
Cut pieces of wire of desired+ length of the panel. Fix one end in a bench vise and the second in a drill chuck. Now turn back and forth several times under constant pull. There comes a sudden point where all kinks and bends straighten out. The result is a close to perfect straight piece of wire.
I tested that on a very(!) slightly tilted sheet of glass and sorted out any wire that didnīt roll down the sheet.
The advantage is, that the wire is very cheap and easy to source and that it features a reliable and constant in thickness insulative layer. I doubt that You can insulate rods with a varnish with the appropriate constancy and evenness of layer thickness and would strongly disadvise against experimenting with non-insulated stators at all!

jauu
Calvin
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Old 25th June 2010, 08:35 AM   #20
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I've found this one, it's for garden purposes.

1.8 mm galvanized steel, covered with 0.6 mm PVC, 3mm total.

Works beautifully and it's cheap, 12$/100 meters.

Straightening is done like Calvin says in post above...
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