Electronics Forum: have (Page 1191 of 3475)

pretinning

Electronics Forum | Tue Jun 03 12:10:42 EDT 2003 | Paul Stolar

I am having a problem remembering what temp to pretin components at. This is for SN63. I thought I used 450F, but this company says 500.

Thermal resistance of a given copper area

Electronics Forum | Tue Jun 03 16:42:33 EDT 2003 | RF Lurker

Does anyone have a method to calculate the thermal resistance of a given copper area?

The machine is only 20%????????

Electronics Forum | Mon Jun 23 17:28:11 EDT 2003 | Garth

You feel Service and Customer Relations is 80% of the product? To me this statement implies that 80% of my total interaction with the machine is with their service and/or customer relation departments. You must enjoy having your machine down. I wa

Heatsink for DPAK package

Electronics Forum | Thu Jun 05 15:34:16 EDT 2003 | davef

Heatsink DPAK SMT Tin Plated: Wakefield Part Number: 21736CT We have no relationship nor receive benefit from the company referenced above. Look here: http://www.heatsink-guide.com/links.htm

Looking for KME Controller

Electronics Forum | Thu Jun 05 14:00:12 EDT 2003 | samaniegocesar

Thank you guys, if you have in stock, used or new, can you send me the price to the next email address please: samaniegocesar@hotmail.com cesar_samaniego@condordc.com Best Regards

Lead Free soldering profile for SMT

Electronics Forum | Fri Jun 06 10:47:27 EDT 2003 | Marc Peo

Kevin, Agree with John's thoughts on profiling and the max temp of 240 degrees in particular. To add to it a bit we have seen the following parameters put in place at many assembly houses to protect against overcooking the components: --Time above

Clean Solder paste

Electronics Forum | Thu Jun 12 04:54:45 EDT 2003 | ronih

I need active solder paste to overcome solderability problems - I believe it have to be washed out, the issue is not the cleaning process only the paste (flux) activity level.

Wave soldering profiling

Electronics Forum | Thu Jun 12 20:16:33 EDT 2003 | danhui888

Try using ECD Wave Rider. This system will helps you on taking the parameter of the machines. It will helps you. Let me have your eamil ID so that I can send some information to you with an attachment. Regards Danny Hui

Wave soldering profiling

Electronics Forum | Wed Apr 14 20:48:43 EDT 2004 | Ken

Just a thought.... Some Fluxes require temperatures upto 260F (127C). Are you using water based flux or solvent (alcohol). I have noticed that many wave machines are NOT capable of preheating adequately when using water based materials. This can


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