[sdiy] stupid solder

[Sowa Roman]

Hi, and thank you for so detailed explanation. It cleared few doubts
but also created ne ones. Questions inline...


__-----Original Message-----
__From: Tony Clark [mailto:clark at andrews.edu]
__Sent: Tuesday, July 09, 2002 5:13 PM
__To: Sowa Roman
__Cc: synth-diy at dropmix.xs4all.nl
__Subject: Re: [sdiy] stupid solder
__
__been performed, it does seem to indicate that lead-free will 
__outperform 
__regular leaded solder, especially when bonding to lead-free 
__parts/PCBs.

So if I use lead-free solder with PCBs that has been plated with
regular solder, I'm making things worse by mixing 2 types?


__reflow, which is a controlled temperature environment, 
__something that's 
__not achievable with a soldering-iron!  So it is quite 

how about hot-air soldering iron? Will it make better results?


__the solder joints.  While the matte surface of the joint 
__would indicate a 
__more fragile crystaline structure in the joint, the truth is that you 
__probably won't stress the joints enough to cause failure.

I've seen many times solder points broken in car radios due
to vibrations.
But I doubt I'll ever make modular for cars (don't even have a car) :)


__in seconds as with soldering irons!  So the most likely 
__problem is that 
__your solder joints are cooling too quickly.  You might try 

well... the best (most shiny, or rather the least matt) results I got
at super-quick soldering, when I heated the pad, and component
lead (how do you call a "lead" of leadless component?) for couple
of seconds, then apply solder and runaway with the iron.
I mean, solder is melt only for really short moment, maybe fraction
of a second.


__   Another thing to try would be to use an inert gas around 
__the solder 
__joint.  Nitrogen, I believe is what is traditionally used in 

I like that! Nitrogen shouldn't be hard to get, so a little pipe from
the bottle to soldering spot might do the trick.
I know! Hot nitrogen soldering!
I tried also flooding everything in resin flux, but it didn't prove
to be usefull.


__   Anyway, hope some of this has been of help!

yes it was, thanks

Roman


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