I'm not sure about the process that applies the insulation, but if the wire is oxidized, perhaps the coating won't adhere? Blair -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory Sent: Friday, August 24, 2007 2:30 PM To: [log in to unmask] Subject: Re: [TN] 26 AWG HML Wire Hi Donald! I got your pictures posted. I'll paste the appropiate picture links to each of your descriptions below... Steve Gregory ________________________________ From: Donald Kyle [mailto:[log in to unmask]] Sent: Friday, August 24, 2007 11:08 AM To: [log in to unmask] Cc: Steve Gregory Subject: 26 AWG HML Wire Steve, would you mind posting these pictures for me. Thanks in advance Donald Kyle Good morning I have some inductors that were made recently that we are having an issue with. They are wound multifilar with 26 AWG HML wire. The problem is with the polyimide insulation; it's peeling off the wire. Not good for the wires to short. I'm suspecting that the insulation was not cured or maybe it's not polyimide insulation. The insulation is peeling where the wire was bent tight and even where it wasn't. These inductors have had a varnish applied and cured but no other processes after that except assembly onto boards. Picture 1 is a lead that was soldered to the board; you can see the insulation has peeled back. http://stevezeva.homestead.com/files/Picture_1.jpg In picture 2, the wires are held together with epoxy and the insulation has peeled back where the wires make a bend. http://stevezeva.homestead.com/files/Picture_2.jpg In picture 3, is another wire with the insulation peeling back. http://stevezeva.homestead.com/files/Picture_3.jpg In picture 4, you are looking straight down the barrel. Notice how the insulation has come away all around the wire. http://stevezeva.homestead.com/files/Picture_4.jpg In picture 5, you are looking at picture 4 but at an angle. http://stevezeva.homestead.com/files/Picture_5.jpg In picture 6, you are looking at a good piece of wire from my stock. http://stevezeva.homestead.com/files/Picture_6.jpg Any ideas? Donald Kyle C.I.D.+ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ******************************************************************* This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. www.Hubbell.com - Hubbell Incorporated --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------