fdegrove said:
And maybe it's just because polyurethane is just easier to work with.
Cheers,
Easier to work with, adequately durable and very cheap to manufacture. The potential gain for audio purposes may be outweighed by the price of the wire and the extra expense it will cause in the manufaturing process of the respective trafo/-inductor.
Especially teflon it troublesome to work with.
Magura
Steve Eddy said:
Steve, I'm not sure the enamel build on the wire I purchased. I merely specified 500VAC at time of ordering and little else, intending, as I was, to use the wire as general purpose hook-up and speaker wire, and to inspect it for possible transformer and inductor use. After I received the wire I phoned the engineer who told me they tested it at 5,000VDC, if that tells you anything about the enamel. I'll post the exact dimensions of the wire tomorrow. I think the enamel thickness is less than one AWG.
Tom
Banned
Joined 2002
serengetiplains said:
Ok, Tom, I found an answer for your original question.
Mike at MagneQuest did a custom transformer for Jean-François Lessard which used Teflon coated magnet wire.
You can ask him about his experiences with it on his new forum at Audio Asylum.
Here's the URL for a short piece on the amplifier the transformer was used in:
http://www.magnequest.com/diy_lessard.htm
And here's the MagneQuest forum on Audio Asylum:
http://www.audioasylum.com/forums/magnequest/bbs.html
se
MagneQuest experiment
Some of you guys (you, se, and Frank and others) are amazing information sources. I'm very impressed. Thanks for the reference.
Re more particularly the report on the MQ teflon transformer, wow, thatsa pretty glowing report. The report is happily consistent with what I would have guessed given the electrical characteristics of teflon and silver (think Nordost Valhallas) .... Now, is there any way to coat magnet wire with bubbly teflon ...and prevent arcing? (I went down this road with foam teflon capacitors ... initial prospects didn't look good, but j'digress.)
Steve Eddy said:
Some of you guys (you, se, and Frank and others) are amazing information sources. I'm very impressed. Thanks for the reference.
Re more particularly the report on the MQ teflon transformer, wow, thatsa pretty glowing report. The report is happily consistent with what I would have guessed given the electrical characteristics of teflon and silver (think Nordost Valhallas) .... Now, is there any way to coat magnet wire with bubbly teflon ...and prevent arcing? (I went down this road with foam teflon capacitors ... initial prospects didn't look good, but j'digress.)
Re: MagneQuest experiment
Thank you for the kind words.
Earlier today a friend of mine said she was very impressed that I'd spelled her name correctly in an EMail I'd sent her (I've normally been calling her by her moniker for years).
I had to let her down by telling her that it wasn't so impressive as I could just look up at the "To" field and see her name.
And I'm afraid I'm going to have to let you down as well. I was just Googling on "Teflon coated wire" and happened across that page.
Even worse, I'd actually read that article about a month ago. But the reference to Teflon coated wire just didn't uh... stick. Pun intended.
Bubbly Teflon? Gee, didn't you read that last link you provided a few posts back? Big picture of bubbly Teflon right there on the page.
se
serengetiplains said:
Thank you for the kind words.
Earlier today a friend of mine said she was very impressed that I'd spelled her name correctly in an EMail I'd sent her (I've normally been calling her by her moniker for years).
I had to let her down by telling her that it wasn't so impressive as I could just look up at the "To" field and see her name.
And I'm afraid I'm going to have to let you down as well. I was just Googling on "Teflon coated wire" and happened across that page.
Even worse, I'd actually read that article about a month ago. But the reference to Teflon coated wire just didn't uh... stick. Pun intended.
Bubbly Teflon? Gee, didn't you read that last link you provided a few posts back? Big picture of bubbly Teflon right there on the page.
se
beach, back yard, sun, no work
Very funny, Steve. I guess it has come to this: the guy with the quickest best Google search curries favour with the women.
I phoned California Fine Wire but they're closed. I surmise, from references to "Memorial Day" on US websites, that today is a holiday in the USA, eh?
Very funny, Steve. I guess it has come to this: the guy with the quickest best Google search curries favour with the women.
I phoned California Fine Wire but they're closed. I surmise, from references to "Memorial Day" on US websites, that today is a holiday in the USA, eh?
Re: beach, back yard, sun, no work
Hehehe. My how times have changed.
Yup. Today's the day we set aside for remembering those who gave their lives in defense of our country. Though for most folks it means little more than three days off from work and Memorial Day sales at the stores.
se
serengetiplains said:
Hehehe. My how times have changed.
Yup. Today's the day we set aside for remembering those who gave their lives in defense of our country. Though for most folks it means little more than three days off from work and Memorial Day sales at the stores.
se
Enamel Thickness
A company that specialises in teflon coating, Applied Plastics, quotes the following for teflon enamel thickness:
"For electrical insulation, coating thickness is typically 0.001 in. (25.4 µm). The manufacturer has coated silver-plated copper wire with diameters from 0.012 to 0.080 in. (0.3 to 2.0 mm) and on stainless steel wire from 0.001 to 0.040 in. (25 µm to 1 mm) in diameter."
Here's a quote from Orion Industries:
"Orion Industries Ltd. has developed a proprietary process to coat continuous lengths of medical and other precision, or fine wire. The process, called FluoroWireSM, allows for a smooth, pin-hole free finish of Teflon® (PTFE, PFA, FEP), Kynar®, Halar®, or other functional coatings. We have the capability to coat most any style (solid, stranded, braided), diameter, and length of wire, including continuous spools. Coating thickness can be controlled from 0.0002 in. + 0.0001 in. (5.1 µm + 2.5 µm) to .002 in. + 0.0002 in. (50.8 µm + 5.1 µm)."
Now we're talking!
Phoenix Wire can coat 24AWG wire with 0.5mil PTFE coating.
Markel Corp. offers .006" teflon coating on 20-32 AWG wire.
A company that specialises in teflon coating, Applied Plastics, quotes the following for teflon enamel thickness:
"For electrical insulation, coating thickness is typically 0.001 in. (25.4 µm). The manufacturer has coated silver-plated copper wire with diameters from 0.012 to 0.080 in. (0.3 to 2.0 mm) and on stainless steel wire from 0.001 to 0.040 in. (25 µm to 1 mm) in diameter."
Here's a quote from Orion Industries:
"Orion Industries Ltd. has developed a proprietary process to coat continuous lengths of medical and other precision, or fine wire. The process, called FluoroWireSM, allows for a smooth, pin-hole free finish of Teflon® (PTFE, PFA, FEP), Kynar®, Halar®, or other functional coatings. We have the capability to coat most any style (solid, stranded, braided), diameter, and length of wire, including continuous spools. Coating thickness can be controlled from 0.0002 in. + 0.0001 in. (5.1 µm + 2.5 µm) to .002 in. + 0.0002 in. (50.8 µm + 5.1 µm)."
Now we're talking!
Phoenix Wire can coat 24AWG wire with 0.5mil PTFE coating.
Markel Corp. offers .006" teflon coating on 20-32 AWG wire.
further particulars
I asked Mike LaFevre of Magnequest who couldn't recall from which wire manufacturer he sourced the teflon magnet wire used in the Horus 2A3 amp posted on his website, but he thought it might have been Phoenix Wire. This company was already on my hit list of companies to investigate.
I telephoned Orion Industries who told me they coat wire primarily for medical purposes and have not done so for audio transformer purposes. I told the rep I was wanting to enamel wire in the range of 0.1mm to 1.0mm thick. The rep said the company only coats wire thinner than 0.1mm.
I also put a call into California Fine Wire asking if they have various coating thicknesses for various thicknesses of wire, what are those thicknesses, and what are the voltage ratings of the thicknesses. I'll post their reply when I receive it.
I asked Mike LaFevre of Magnequest who couldn't recall from which wire manufacturer he sourced the teflon magnet wire used in the Horus 2A3 amp posted on his website, but he thought it might have been Phoenix Wire. This company was already on my hit list of companies to investigate.
I telephoned Orion Industries who told me they coat wire primarily for medical purposes and have not done so for audio transformer purposes. I told the rep I was wanting to enamel wire in the range of 0.1mm to 1.0mm thick. The rep said the company only coats wire thinner than 0.1mm.
I also put a call into California Fine Wire asking if they have various coating thicknesses for various thicknesses of wire, what are those thicknesses, and what are the voltage ratings of the thicknesses. I'll post their reply when I receive it.
Silver Audio sells in-house teflon-enameled silver wire for OEM (presumably including DIY) purposes. I've sent them an email inquiring about their capabilities and whether they might sell to DIY buffs.
http://www.silveraudio.com/newtotal2.html
http://www.silveraudio.com/newtotal2.html
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