Electronics Forum | Thu May 05 03:22:38 EDT 2005 | Hannu
I do not mean big, heavy transformers but rather small ferrite core transformers, with ferrites in the range of EF16 .. EF40. The weight of the lead and its percentage of the total weight is not the issue here. We simply do not want lead-containing t
Electronics Forum | Wed May 18 14:58:05 EDT 2005 | splice
Hi, I am having some PTH non wetting issues. Setup and chronology of events is explained: Set Up; Part: 1 MM pitch connector 378 pins Solder: Kester Ultra Pure 63/37 solder Pot; 250 C pre heat; Peak 94C top side Flux: Qualitek 775, Fluxer: foam T
Electronics Forum | Sat May 21 08:22:42 EDT 2005 | davef
We agree with the previous poster. 50 pounds sounds like a lot. We don't know: * How often you dedross? * What method you use for dedrossing? * What portion of your dross that is dross versus solder? * How many boards do you run between drossings?
Electronics Forum | Thu May 26 19:32:13 EDT 2005 | Mike Konrad
Three popular methods: Resistivity of Solvent Extract (ROSE) Test Method IPC-TM-650 2.3.25: The ROSE test method is used as a process control tool to detect the presence of bulk ionics. The IPC upper limit is set at 10.0 *g/NaCl/in2. This test is p
Electronics Forum | Tue May 31 11:56:12 EDT 2005 | chunks
Hi Matt, Get definitive answers! Contamination on the HASL finish?: From the pix you posted, it looks like something fishy is going on. I�d reject them back to the board house and demand an answer. Most board houses and purchasing people will g
Electronics Forum | Thu Dec 22 21:29:05 EST 2005 | davef
Josh: Room Temperature Vulcanizing (RTV) is Dow Corning's trade name for it's family of silicone cure sealants. RTV is about the worst kind of coating there is. Its chemistry is highly ionic and it requires atmospheric humidity absorbed to "complete
Electronics Forum | Wed Mar 15 17:37:30 EST 2006 | Dan Feinberg
Greetings all, Dross has no value to the assembler. It actually degrades quality as a clean solder pot provides a more consistent process. Yes, removing dross does remove some metallic contaminates but that is overkill, like throwing away your refrig
Electronics Forum | Thu Mar 16 10:55:23 EST 2006 | Baer
I can tell you that I have been involved in new process chemical introductions for 40 years. I have seen a lot of claimes and this is one of the best inovations I have seen. If I was not convinced of this I would not be involved. As for process impr
Electronics Forum | Mon Feb 27 17:08:15 EST 2006 | GS
3,5 ugr/cm2 NaCl) or power components, or Raw PCB. Nothing with the solder process or fluxes. Ion Chromatography analysis was necessary to help understanding of contamination origin. When occasionally we run TIC on a NC assembled PBA (Paste ROL0 or
Electronics Forum | Fri Jul 14 14:05:55 EDT 2006 | nodlac
Additional to Dave F.... A potato has Iron @ 2.75mg and Magnesium @ 55mg. The leaching of these two meatls could contaminate the solder pot and taint the solder. ----------------------- Additional to my additional..THE SOLDER POT POTATO BATTERY...A p