Steve, try this mask with carbon insert. it works wonder to filter the smoke, smell. it is better than the hog nose type... ;-). http://www.amazon.com/Can-Breathe-Masks-Honeycomb-Carbon/dp/ B0016IM7KQ/ref=pd_sxp_f_pt jk On Jul 17, 2014, at 1:46 PM, Steve Gregory wrote: > Hi All! > > I'm trying to deal with all the smoke that's here in Boise today, it's > probably the worst smoke I've ever been in. The jet stream has made > a dip > and is carrying all the smoke from the fires in Washington, Oregon, > and the > fire north of us in Boise county right into the Treasure Valley and > it's > all packing up against the mountains to the west of us (cough, > cough..) > > Anyways, I have a question about a little custom inductor from > Vishay Hirel > that we have here. It appears that we have a certain datecode batch of > these where the insulation on the part of the wire that gets > soldered into > the board wasn't stripped and tinned high enough, and now when we > try to > install them into the board the insulation prevents wetting at the > top of > the board and we have insulation in the solder joint which of > course is a > defect: > > http://stevezeva.homestead.com/Vishay_Inductor.jpg > > The picture is of one that we pulled out of a board, and you can > see that > the insulation goes down past the shoulders and into what is > supposed to be > the solderable area. > > I think I know the answer to my next question, but I'll ask it > anyway. Is > there any clever way to remove that insulation without damaging the > inductor? The picture makes this inductor look huge, but it's not, > it's > maybe .250" in diameter, and the wire is a pretty small gage too. > > I tried dipping it first in a lead-free tinning pot set at 600 C., > no luck, > then 700 C., no luck, then 800 C., and no luck. I was able to > darken the > insulation and melt the yellow tape that wraps the inductor, but > that's > about it. I'm think that the only way to remove this insulation is > mechanically...which will be a trick because the inductor and wire is > pretty small. > > Hate to scrap these things because they are long lead custom > inductors. But > we can't use them like they are.... > > Steve > > -- > > > This email and any attachments are only for use by the intended > recipient(s) and may contain legally privileged, confidential, > proprietary > or otherwise private information. Any unauthorized use, reproduction, > dissemination, distribution or other disclosure of the contents of > this > e-mail or its attachments is strictly prohibited. If you have > received this > email in error, please notify the sender immediately and delete the > original. > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud > service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________