Electronics Forum | Fri Sep 27 08:12:19 EDT 2002 | yngwie
Dear all, My customer is asking me to add chevron solder mask registration marks to their board design, drive fabrication capability study from their board vendor(s), and make sure tolerances are established correctly for copper traces and solder mas
Electronics Forum | Thu Oct 28 11:41:21 EDT 2004 | Steve Stach
Hello Loz, Blue residues on circuit boards can be caused by copper corrosion, component body deterioration, marking permanently, and adhesive break down. In this case, a more subtle mechanism appears to be possible. This is a no clean application
Electronics Forum | Wed Apr 17 22:17:58 EDT 2002 | davef
OK. I give-up: * �Nuts & Volts� Magazine, September 1997, ENCYCLOPEDIA OF ELECTRONIC CIRCUITS: THE CD-ROM OF 1,000 CIRCUITS � PART 1 - TJ Byers - In this three-part series, TJ will show you how to use this CD to go from concept to copper, and build
Electronics Forum | Mon May 22 15:46:49 EDT 2006 | adlsmt
Grant has a good idea, we started that way also. We made a tank out of stainless steel with copper tube coils about 18" off the bottom. Circulate cold water through the tubes to condense the vapor to keep the loss down. We used electric burners under
Electronics Forum | Fri Jul 13 16:52:24 EDT 2007 | jmelson
warning - not all stainless steels are non-magnetic! Quite a few alloys are magnetic, some as highly magnetic as ordinary steel. One quick test is to demagnetize the jaws. If you can find one of the old-style Weller soldering guns with the copper
Electronics Forum | Tue Aug 21 05:05:52 EDT 2007 | vangogh
Hi All, I would like to get some inputs regarding this.... I have bare PCB which were stored with kapton tape attached on the Au plated pads. These were stored for close to a year. Upon removal of kapton tape, we noticed discolorations on the edges o
Electronics Forum | Thu Sep 06 10:55:37 EDT 2001 | davef
saturation occurs at ppm levels. Remember, IPA is extremely flammable and its bulk use makes the plant liable to all sorts of quite repressive safety rules/regulations and so on. Ignoring these rules exposes the owner to fines and possible plant cl
Electronics Forum | Wed Mar 20 11:47:06 EST 2002 | Hussman
Ron, Some places want/need oven calibration and some don't, just need a profile. I've worked for both. If you need oven calibration, an easy, inexpensive way is to parallel thermalcouple wire to your existing thermalcouples. Terminate the ends of
Electronics Forum | Wed Oct 10 13:51:08 EDT 2007 | petep
Coilcraft has posted the following and I am wondering how you folks are handling the use of coils in a Water Soluble world. PCB Washing and Coilcraft Parts Coilcraft tests for resistance to solvents per the following specification: Resistance to s
Electronics Forum | Sat Nov 14 08:05:54 EST 1998 | Earl Moon
| | | | I believe that gold fingers on my circuit boards are being | | | | contaminated and need to clean them with some chemical | | | | solution. Any recommendations. | | | | | | | Chuck: What is the type and source of your contamination? Dave
