Electronics Forum | Tue Apr 22 11:02:42 EDT 2003 | k_h
I'll throw this out there also: http://picturecenter.kodak.com/share?invite=HE2r4mzhP5YLJkvkhU1o It shows void slots (purple) in the copper on the perimeter of the smaller transistors heat sink. Should keep the smaller transistor from moving while th
Electronics Forum | Mon Apr 21 09:01:38 EDT 2003 | russ
Wave solder - Initially high cost but after that it is relatively cheap. Selective soldering with a solder pot such as the Air-Vac PCBRM models - Much lower cost than wave but if you get the right nozzles it is a great process. Solder preforms - s
Electronics Forum | Wed Apr 23 19:24:29 EDT 2003 | MA/NY DDave
Hi Grant, You already have a few good answers. If you have but one to a few BNC connectors I would kind of use the advice here or do what you already are doing aka hand soldering. I would not install a Wave Solder line for a really low volume of BN
Electronics Forum | Mon May 26 04:02:13 EDT 2003 | Franky
Dear sir, I think so with every idea , everyone is correct , paste , pattern of pad design ,profiling or solder mask on PCB ,and one of the cause of tombstone that I found is alignment of machine placing and solder printing , from my experience many
Electronics Forum | Sun Apr 27 18:38:55 EDT 2003 | Yngwie
One of my customer asking me about my capability on soldering nickel strip onto the PCB pad. Given the size of the pad of 80 mil X 80 mil, and he want to ensure that we can pass 4.5kg peel force(solder wire Sn63/Pb37). Anybody with this experience ?
Electronics Forum | Tue Apr 29 03:29:01 EDT 2003 | chrissieneale
Does anyone have any figures on visual fail / no pick? our machine records this but no one has been recording the machine and it's been running since we've had it (a good few years). I am currently assuming it's about 0.2/0.3% but this is a (not very
Electronics Forum | Thu May 01 18:37:31 EDT 2003 | gregoryyork
Did you get any dulling of the solder joints at all or importantly was the resist discoloured or bleached after cleaning. It is possible to absorb flux and saponifier into the resist and this will definately cause poor SIR or electromigration especia
Electronics Forum | Mon May 19 02:59:04 EDT 2003 | emeto
Hi, I can give you a few steps. 1. The solder paste. Take the profile that manifacturer gives for the paste. 2. Use termocouple to measure the tempereture. Put PCB and measure the temperature in equal terms. 3. Compare your profile to manifacturers
Electronics Forum | Thu May 15 07:37:49 EDT 2003 | pteerink
Have seen similar circumstances a couple times. Possible causes: 1) PCB defect - remove the BGA and inspect/test the PCB for shorts. ( trace short, layer short etc ) 2) PCB defect that only shows up when the BGA is populated - a short somewhere o
Electronics Forum | Fri May 30 20:54:53 EDT 2003 | jonfox
Conversion refresher: 1 inch = 25.4 mm 1 inch = 25,400 microns 10 microns = 0.3937 mils 10 microns = 0.010 mm so 0.4mm = 400 microns and for s/n/g: 1mm = 3.240783e-20 parsecs (pc) Have some fun with that one!
