Electronics Forum | Thu Aug 21 12:06:17 EDT 2008 | pms
Thanks for your replies. The problems do not appear on the complete lot of PCB's. I don't know the percentage at this point. I agree. It also appears to me that these PCB's are over-etched. The PCB rep say's "Yea, there's a few boards that have
Electronics Forum | Wed Aug 20 08:23:36 EDT 2008 | davef
Your tantalum capacitor supplier offers the best advice. We're not sure of the package that you plan to use. * If you are referring to molded package, surface mount, tantalum caps, yes, they can be wave soldered. Smaller case size chips (eg, Kemet A
Electronics Forum | Mon Sep 08 08:59:45 EDT 2008 | davef
You're correct: * Sealed relays should not be cracked or have moisture intrusion. * Hand soldering relays is going to be expensive. [Using a mini-solder pot for this might reduce some of the burden.] The good part is that the problem is gross enough
Electronics Forum | Wed Sep 10 08:16:23 EDT 2008 | ck_the_flip
I guess sarcasm and quick wit flies over some peoples' heads. 8 years ago (wow, that's an old post), I was poking fun at the guy, and wanted to illustrate how ridiculous it was that he spat upon our printed circuit board assemblies to simulate moist
Electronics Forum | Thu Sep 11 19:19:07 EDT 2008 | Mike Konrad
Most ionic contamination testers prompt the operator for the current concentration at the start of each cycle. The normal concentration is 25% DI Water and 75% IPA. Although most machines ask for the current concentration, concentration adjustments
Electronics Forum | Mon Sep 22 15:25:37 EDT 2008 | davef
Most of the BIG suppliers of uV materials also offer ovens. Equipment, Assembly, Adhesive, Curing System, uV 1 Integrated Dispensing Solutions, 5311 Derry Ave Building D, Agoura Hills CA 91301; 818-597-4300 F818-597-4301 http://www.dispensinglink.co
Electronics Forum | Thu Oct 02 17:55:16 EDT 2008 | davef
~le sigh~ makes a good point about forcing bent leads into the solder, letting the solder cool, and releasing the force on the lead. On the other hand, reforming leads of components prior to assembly is dangerous, also, because the "bending of a lead
Electronics Forum | Fri Oct 10 05:04:26 EDT 2008 | bing007
We are using Mulicore MF101 flux and a Vitronics selective soldering machine on a lead-fee assembly and are having trouble with nozzles blocking even when the nozzle aperture is increased. Has anyone come across this problem before using fluxes with
Electronics Forum | Tue Oct 14 09:26:15 EDT 2008 | bickt
Hi, I have been at both ends of this business. I installed lines and have been in manufacturing for some 25 years. Do not go by the test boards that the installer or OEM uses. these boards are too broad and loose for any kind of guide line to est
Electronics Forum | Thu Oct 30 22:29:58 EDT 2008 | davef
For most applications, a nice square [or rectangle] pad works just fine. Assemblers ship boat loads of boards with these every day. It's reasonable for tight decoupling capacitor requirement applications to use round or radiused pads for components
