Electronics Forum | Thu Oct 16 10:56:23 EDT 2003 | james
We received some parts from our stores room with out a part number. We have 2 to choose from one being a 5% and one being a .1%. Does the color of the resistor mean anything? Just need some help on this. Thanks.
Electronics Forum | Mon Apr 13 18:18:31 EDT 2020 | wbrenner
Does any one have a general cost percent going from class 2 to class 3 for the same Assembly.. Or, general up charge percent when biding class 2 vs class 3?
Electronics Forum | Mon May 12 22:40:19 EDT 2003 | nyazga
I have always heard to use solder with 2 percent silver to reduce gold embrittlment. One vendor site said this is a myth. Does anyone know of a specific document recommending this such as IPC or MIL spec. ???
Electronics Forum | Tue Mar 20 07:27:26 EDT 2007 | davef
You need to keep the silver concentration of the solder connection below 2 percent by weight. Concentrations above that level can cause solder connections to fail. We have seen 4 percent concentration discussed. [The 4% assumes a uniform distributi
Electronics Forum | Mon Apr 23 11:44:55 EDT 2001 | CAL
650 Standards are also located in the back of IPC JSTD-001. I am currently looking at 4 pages on bow and twist. Percent bow = R1-R2/L x 100 (R1= Highest point; R2=lowest or resting point; l= length) Percent twist=(R1-R2)/(2xL)x 100 Sorry if this is
Electronics Forum | Mon Feb 27 09:09:36 EST 2006 | davef
Silver on your copper or brass part is a solderability protection. The silver diffuses into the solder and you solder to the base metal, either the copper or brass in your case. Soldering to copper is well known. The issues are soldering to brass
Electronics Forum | Thu Apr 10 03:03:23 EDT 2003 | emeto
Hi all.We have between 2 and 3 percent waste of components.The software gives info about the whole waste and I am interested what's the limit for component waste?Where I can read about it?Are there any tables with given limits? Any posts,please!
Electronics Forum | Mon Dec 19 08:56:18 EST 2005 | davef
Q1a. If the thickness of the silver is too much (how is too much??), A1a. We have heard stories of using Ag2 to limit silver [or gold] dissolution, but have never seen formal studies to demonstrate that idea. First, exclude the use of silver plate
Electronics Forum | Tue Aug 24 06:29:04 EDT 2004 | johnnybravo
1. quite easy. if you create a smart database for yourself to keep the algorythms easily available, it becomes even easier. 2. reliable, once they've been set up, and "burnt in". in the first couple of weeks they tend to have "child sicknesses". su
Electronics Forum | Tue Sep 09 09:04:17 EDT 2008 | davef
Oh that's GREAT. Now, we're encouraging engineers blow to saliva on boards. The saliva is made 99.5 percent of water and 0.5 percent of dissolved inorganic compounds. One third of the 0.5 percent are dissolved metal-ions such as Ca2+, Na+, K+, Cl- a
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