Electronics Forum: kester (Page 41 of 51)

Re: high temperature solder alloy

Electronics Forum | Thu Oct 07 16:57:02 EDT 1999 | Glenn Robertson

I have a board, 4 spacers needed to be soldered on the board first with the normal 62Sn37Pb alloy. Then, capacitors are manually soldered on the boards. The density of the board is quite high. If we wave soldered capacitors first, there wi

Re: high temperature solder alloy

Electronics Forum | Fri Oct 08 08:26:03 EDT 1999 | Carol Zhang

I have a board, 4 spacers needed to be soldered on the board first with the normal 62Sn37Pb alloy. Then, capacitors are manually soldered on the boards. The density of the board is quite high. If we wave soldered capacitors first, ther

Re: water soluable or no clean flux?

Electronics Forum | Tue Sep 21 02:51:06 EDT 1999 | Mohammed saad

Thank you all for your help. about your question Wolfgang, I am using no-clean solder paste from Kester. Mohammed Hi all, We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we ne

Re: What's a good sub for 1,1,1-trichloroethylene

Electronics Forum | Thu Jul 22 16:36:06 EDT 1999 | Mike Konrad

Scott is right, Alpha' 2110 is a good saponifier (be careful though as it can dull your leads). Saponifiers in general are better if used in an aggressive spray-in-air system. Low agitation immersion systems (heated baths or refurbished vapor degre

Re: Andon BGA Socket Soldering Problem - Ball Collapse

Electronics Forum | Thu Jul 15 10:33:59 EDT 1999 | Michael Zadrejko

I am trying to solder a 388 ball BGA to an Andon Electronics Corp. BGA socket adapter and I am having problems in the reflow of this part. I put no clean paste flux in the solder cups of the adapter then put the BGA part onto the adapter and run

Re: Discoloured soldermask

Electronics Forum | Thu Apr 22 20:26:39 EDT 1999 | Dave F

On various PCB's after building processes,such as reflow, flowsolder and wash. The soldermask on the PCB's have become discoloured, like a 'marble' effect all along the solder side of the board, it is lighter in contrast than normal, although whe

Solder FINES vs. Solder Balls

Electronics Forum | Wed Apr 14 13:37:56 EDT 1999 | Mark Charlton

Can someone explain the difference between solder "fines" and solder balls? Is there an official specification where "fines" are defined? What is the spec for "fines"? I consider "fines" individual unmelted metal spheres that are found in solder

Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 12 19:28:26 EDT 1999 | Tom B

Netters, When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? 1. Kester 293 no clean 2. 2.1 C/s for 30s to 150 C 3. .5 - .7 C/s for 60s to 185 C 4. 1.5 C/s u

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Tue Apr 13 18:11:00 EDT 1999 | Jimmy Strain

Netters, When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? 1. Kester 293 no clean 2. 2.1 C/s for 30s to 150 C 3. .5 - .7 C/s for 60s to 185

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 19 11:21:03 EDT 1999 | Travson

Netters, When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? 1. Kester 293 no clean 2. 2.1 C/s for 30s to 150 C 3. .5 - .7 C/s for 60s to 185


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