Any Aussie been able to source thick coils yet?? - diyAudio
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Old 4th May 2006, 05:39 AM   #1
Andy G is offline Andy G  Australia
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Default Any Aussie been able to source thick coils yet??

There must be somewhere over here we can get well wound thick wire coils !!!
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Old 4th May 2006, 06:19 AM   #2
lndm is offline lndm  Australia
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What about these

http://www.soundlabsgroup.com.au/p/MU-AC0m33-2mm/Sound

from this page

http://www.soundlabsgroup.com.au/mm5...ore_Code=Sound

can't find any info on them, guess they wan't a phone call. These seem a little expensive (which is promising)
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Old 4th May 2006, 07:36 AM   #3
Andy G is offline Andy G  Australia
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those prices are a joke !!!!

A 1.8mm .1mH coil from ME Tech was about $7 iirc, these guys want $18 for a 2mm 1.mH coil. Rip rip woodchip !!!
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Old 4th May 2006, 07:42 AM   #4
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For those prices buy an LCR meter from Jaycar and wind your own! Some electric motor repair shops will sell you ends of wire rolls. It's DIY!
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Old 4th May 2006, 08:05 AM   #5
lndm is offline lndm  Australia
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Do you know off hand whether a 1mH wound with 2mm would have a DCR of 0.2 ohms or less?
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Old 4th May 2006, 08:10 AM   #6
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I got about 150 meters of 2.2mm copper wire for around 20 bucks from a motor shop here, i am considering getting that jaycar stepper motor controller and a stepper motor to wind them more accurately (computer does the winding fairly slowly whilst i hold the wire). You can use speaker workshop and the impedance jig to measure the inductors before you finish winding so you can get within very close tolerances)

WES/Wagner do sell some of the solen perfect lay inductors (not sure which ones, they have a 0.28ohm DCR for 1.5mh inductor), however you have to look in the passive components section of their new catalog, they aren't in the speaker section for some reason. They are still quite expensive.
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Old 4th May 2006, 08:16 AM   #7
Andy G is offline Andy G  Australia
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Quote:
Originally posted by lndm
Do you know off hand whether a 1mH wound with 2mm would have a DCR of 0.2 ohms or less?

A 1.8mm 1mH coil has dcr = 0.199ohms so I guess a 2mm wire is slightly less.

I have the old 'ME Tech' files which give resistance for the different wires they used, as well as the prices they charged. Copper prices have gone up though, and ME Tech no linger exists as such (but may resurrect ;-)) !!!

email me if interested.
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Old 4th May 2006, 08:19 AM   #8
Andy G is offline Andy G  Australia
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Quote:
Originally posted by noodle_snacks
I got about 150 meters of 2.2mm copper wire for around 20 bucks from a motor shop here, i am considering getting that jaycar stepper motor controller and a stepper motor to wind them more accurately (computer does the winding fairly slowly whilst i hold the wire). You can use speaker workshop and the impedance jig to measure the inductors before you finish winding so you can get within very close tolerances)

you will need a slow but powerful motor I think!!
gearing may help, but 2.8mm wire is hard on the hands !!!!

I wonder if I bought an old push bike I could rig something up ???
spreadsheet to calculate how many turns, click counter to count for me....
might get a bit fitter !!! has prospects ;-))
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Old 4th May 2006, 10:20 AM   #9
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Hi Andy,

Please see my post:
http://www.diyaudio.com/forums/showt...107#post389107
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Old 4th May 2006, 10:41 AM   #10
Andy G is offline Andy G  Australia
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I am actually talking with a local 'transformer' specialist. He may be what we are after. I've seen some of his work.. very neatly done !!!

Again, so long as it doesn't go overboard.... he's not interested in doing bulk stuff.
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