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Re: bare board problem

Electronics Forum | Fri Jun 18 17:11:07 EDT 1999 | Earl Moon

| | Ah Yes, 'twas many a year ago, in a land of gambling and fast women. High upon the desert, I received the expert tutelage by the old master so wise and so old. Yup its a small world, Viva Gardnervill. And happy trail's to you, until we mee

Re: bare board problem

Electronics Forum | Fri Jun 18 17:40:28 EDT 1999 | M Cox

| | | Ah Yes, 'twas many a year ago, in a land of gambling and fast women. High upon the desert, I received the expert tutelage by the old master so wise and so old. Yup its a small world, Viva Gardnervill. And happy trail's to you, until we m

Re: bare board problem

Electronics Forum | Fri Jun 18 17:43:54 EDT 1999 | M Cox

| | | Ah Yes, 'twas many a year ago, in a land of gambling and fast women. High upon the desert, I received the expert tutelage by the old master so wise and so old. Yup its a small world, Viva Gardnervill. And happy trail's to you, until we m

Re: Chip Resistor Failure

Electronics Forum | Tue Mar 23 02:32:23 EST 1999 | Bob Willis

| | Has any one seen failures of chip resistors after 1-2 years where the junction between the silver termination and the restive element on the top of the ceramic has corroded through. This results in a high resistance failure after this period of t

Re: Chip Resistor Failure

Electronics Forum | Wed Mar 24 02:23:14 EST 1999 | P.L. Sorenson - Technical Consultant

| | | Has any one seen failures of chip resistors after 1-2 years where the junction between the silver termination and the restive element on the top of the ceramic has corroded through. This results in a high resistance failure after this period of

Re: No-Clean Paste Lab Test Evaluations

Electronics Forum | Sat Feb 14 19:35:51 EST 1998 | C. Lao

Mr Lao We have some specialist knowledge on this subject and offer both equipment and services for these tests. My first recommendation is that take coupons manufactured by your PC Fabricator and then samples at each manufacturing stage: Bare coupon

Solder pot contamination

Electronics Forum | Mon Aug 09 20:47:21 EDT 2004 | KEN

I think OA flux left on the pot would quickly looses its activity and become part of the dross waste stream, and smoke stream for that matter. Also, if your wave is setup properly your selective pallets will scour (push) the top of the lambda wav

Cap Short

Electronics Forum | Mon Nov 22 17:32:34 EST 2004 | davef

Assemblers often assume that the board and component suppliers provide them with clean product. This was not a problem when everyone used water washable fluxes, because the water washing used to clean the flux residues also cleaned the board and com

Soldering to brass?

Electronics Forum | Tue Aug 07 19:32:40 EDT 2007 | davef

Zinc from the brass diffuses into the solder and reacts with tin causing dezincification. Dezincification is a specific type of de-alloying, or selective, leaching corrosion of brass fittings. This type of corrosion selectively removes zinc from th

Flux residue

Electronics Forum | Tue Jul 28 07:42:07 EDT 2009 | Mike Konrad

Hi Sean, No-clean flux does leave a residue. Under the best conditions, it is invisible. There are many factors that can cause the residue to become visible such as an inadequate oven profile (or lack of proper preheat on a wave). Also, if wave s


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