Electronics Forum | Fri Dec 16 08:16:41 EST 2005 | davef
Heat cycles deplete the pure tin layer. Each solder cycle reduces the tin thickness by ~0.1 micron (4 uin). So, if you start with a thin imm tin coating you'll have problems after multiple heat cycles. Steve Wentz says, "In almost every case I've
Electronics Forum | Fri Feb 17 16:57:33 EST 2006 | Hoss
I'm looking for an RH meter for monitoring of a component drybox. Our target is to maintain 0-1% RH. I've looked at many different units and none of them have the required accuracy. +/-2% is the best I've been able to find with units capable of me
Electronics Forum | Fri Mar 24 13:35:53 EST 2006 | bvdb
If one considers that a computer used to fill a good sized room and now can sit in/on your hand I would say that the electronics industry has already greatly reduced the use of lead. Microelectronics keeps getting smaller with fewer interconnects
Electronics Forum | Tue Nov 07 10:43:25 EST 2006 | muse95
Also, have you considered the possibility that if you solder on an existing joint on a board that was built with SnPb solder, even though you are using leadfree solder wire, you would now contaminate the tip of your soldering iron. If you then start
Electronics Forum | Mon Nov 27 21:29:57 EST 2006 | davef
Chemical gold is a poorly defined [very sloppy] term that means various thing to different people [as you've demonstrated]. Commonly it is either: * ENIG: 5�m Ni, 0.1�m Au * Immersion gold "Autocatalytic chemical gold plating" - Refers to "electrol
Electronics Forum | Mon Mar 05 15:56:21 EST 2007 | jasont
NM-2858 is European style M size MV2F. NM-2859 is European style XL size MV2F. MV2F is manufactured rated at 0.1sec per placement however, I have only seen them acheive around 20-25,000 cph I have x2 MV2F-XL "Q" in stock (NM-2559MB) w/feeders. IF
Electronics Forum | Tue Jun 05 22:59:18 EDT 2007 | davef
There is no standard. Companies select a lower control limit based on the desired cleanliness. Guidelines to consider are: * With fresh resin beds, expect get 17.5 mohm-cm water into the final rinse and then it decreases from there. * Semiconducto
Electronics Forum | Tue Jun 26 21:41:10 EDT 2007 | davef
4.4 Determine the amount of flux on the board. 4.4.1 Get a piece of corrugated cardboard and a weighing scale accurate to 0.01 grams. NOTE: Use cardboard with alcohol fluxes to slow their evaporation and get good data. 4.4.2 Weigh the cardboard. 4.4
Electronics Forum | Mon Feb 25 18:36:52 EST 2008 | jmelson
Our people have EXCELLENT reading skills, and for some stuff I do have a list of the order to assemble the parts, with some tricks, etc. called out. But, a color-coded assembly drawing is what we use the most. I use Sharpie markers to color-code th
Electronics Forum | Fri Sep 26 12:16:52 EDT 2008 | bickt
you cannot swap 0-3 only 0-1 or 2-3 they are not the same euro cards. they function very diffrently. if you look you will see there are more chips and circuitry on one set. there are 2 w/red leds and 2 with green leds. at least thats how they soo
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