Electronics Forum: through hole leads turning green (Page 1 of 3)

Re: paste in hole

Electronics Forum | Mon Jun 28 11:47:54 EDT 1999 | Christopher Cross

| | | hello, | | | | | | has anyone tried dispensing solder paste in thru holes instead of waving or hand soldering. if so how did it work out for you. | | | thanks for the input | | | | | | wayne | | | | | | | | | | | We have tried this mainly

cold joint on 1 lead of IC

Electronics Forum | Thu Feb 08 09:58:21 EST 2007 | realchunks

Got a picture? Most times I hear this situation it turns out to be a bent leg on a thru-hole transistor that didn't go through the board.

Best practices for changeover --Leaded > Lead-free > Leaded--

Electronics Forum | Tue Dec 16 22:09:36 EST 2014 | deanm

The critical operations where cross contamination can occur is the paste printer, the touch up station and the hand soldering station. Hand insertion should not be a problem if the parts are kitted or issued with proper control. If possible I would

Lead free compatibility

Electronics Forum | Mon Dec 05 17:53:04 EST 2005 | KEN

I hate to sound like a broken record but the industry has been placing lead free through-hole parts forever. Now all of a sudden its a problem??? Gold finish, silver, silver paladium, alloy 42, even pure copper. Reliability will be a function of t

Reflow help needed, Hotflow 5

Electronics Forum | Fri Sep 09 18:19:25 EDT 2011 | cusackmusic

First of all, if you are going to tell me to throw my crappy equipment away, and buy a better oven because 3 zones isn't enough for lead free soldering, please find another thread to troll in. We have been using a Hotflow 3 for several years for lea

Re: Help! 2-layered Thru-Hole PCB Solder Mask/Soldering Problem

Electronics Forum | Thu Sep 30 07:03:05 EDT 1999 | Scott Cook

| Hi everyone, | | Greetings! | | I�ve got a 2-layered through-hole PCB�s having the following problems: | | Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB | Insufficient Solder and some solder ne

Re: Providing Thermal Relief On Vias

Electronics Forum | Wed Jun 03 21:25:33 EDT 1998 | John Allan

| Hello: | BACKGROUD: SMT components soldered on the top-side of boards that also require wave soldering have the potential to reflow during wave soldering. Reflowing these components during wave soldering is not good. It can cause cold joints, op

Re: Providing Thermal Relief On Vias

Electronics Forum | Thu Jun 04 08:32:21 EDT 1998 | Dave F

| | Hello: | | BACKGROUD: SMT components soldered on the top-side of boards that also require wave soldering have the potential to reflow during wave soldering. Reflowing these components during wave soldering is not good. It can cause cold joints

Foam fluxer maintenance, storage and cleaning

Electronics Forum | Mon Nov 09 09:44:22 EST 2015 | davef

Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or checking a wave solder machine operation with a test board. Applicability. To be used for new design printed circuit assembles and during machine accept

Flux Residues In Lead Free Wave Soldeing Process

Electronics Forum | Sat May 27 02:52:20 EDT 2006 | TimS

Gentlemen I have managed to pull myself together after banging my head. I am not sure the flux volume is the total solution here. All spray processes deposit flux in a similar manner, that is to say the vast majority of material sprayed onto the PCB

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