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Electronics Forum: you (Page 1956 of 3793)

Solder Paste and fine pitch components

Electronics Forum | Fri Sep 20 04:47:29 EDT 2002 | byates

If I were you I would contact your solder paste applications engineer and your stencil applications eng. They are there for this very reason and are very capable

should gold pads be pretinned, what issues are known are there?

Electronics Forum | Wed Sep 18 18:10:15 EDT 2002 | davef

IMHO, this finish is more cosmetically appealing than technically desirable (and VERY profitable for the PCB maker). That editorial comment aside, you're correct. Increasing the concentration of gold: * Hardens the solder. * Increases the liquidou

SMEMA standards

Electronics Forum | Wed Sep 18 15:58:47 EDT 2002 | JS

You can find the spec on the IPC website in download format. Just type "Smema standards" in your search box and go Regards

About the PCB gold finger contamination.

Electronics Forum | Thu Sep 19 21:26:52 EDT 2002 | davef

Sam, You're correct. And that's what Joe would prefer to do with his contaminated boards, but he's trying to keeping line running, I believe.

9V battery

Electronics Forum | Thu Sep 19 16:02:25 EDT 2002 | deejayedwards

Hey, Im not that good with electronics so im just asking: is there ANY WAY you could convert a 9V scource to a 12V scource. Like some kind of converter, or connecting 9V batteries together in some way? Sorry for the stupid question. Thanks in advan

MPM AP25 Parts

Electronics Forum | Fri Sep 20 15:44:00 EDT 2002 | pjc

Do you have a Panasonic & Toshiba camera? What are the MPM p/ns your looking at? Whats the problem? Noise perhaps. If noise try checking the metal cylinder to the right of the camara housing. The set screws can loosen up. Tighten up all the screws.

MPM AP25 Parts

Electronics Forum | Tue Sep 24 08:47:17 EDT 2002 | pjc

Please send me the s/n of your machine to my mail box and I'll see what I can dig up for you.

QFP IC open solder

Electronics Forum | Sun Sep 22 09:36:04 EDT 2002 | davef

Sometimes the cut end of QFP leads have corrosion that is very difficult to solder. If this is what you're talking about, it is not a defect according A-610C, 6.5.2, Exposed Basis Metal