On Wednesday 13 June 2007 11:36, Brooke Clarke wrote:
> ...
> Working with solder wick on SMT parts I learned THE major reason for using
> flux.  It's not to  clean the joint, but rather to provide a good thermal
> path to heat the joint.  Prior to using a flux pen to wet the solder wick
> my results were spotty.  But when using flux to wet the wick it works great
> each and every time.

I've found exactly the same thing, and it's really the only reason I add 
additional flux.  But I didn't think it was for getting heat to the joint, 
but that flux helped created a sort of wicking action to get solder to flow 
properly.

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