[sdiy] Solder won't stick to old PCB

[Sam Ecoff]

Ooo...

I might know what this is... I got a roll of solder a couple years ago  
in which part of the roll didn't have flux in it. When I got to those  
parts of the roll, the solder did exactly what you describe; little  
balls of solder that wouldn't stick to anything (other than to the  
iron.) It gave me an excuse to ditch the Rat Shack soldering iron I'd  
been using and upgrade to a nice Weller Station, but it really drove  
me nuts trying to solve the problem! If you don't conclusively figure  
out what it is that's causing your problem, don't forget to try a  
different reel of solder.

HTH

Sam E.


On Sep 26, 2009, at 3:03 PM, cs e wrote:

> Hi,
>
> I'm trying replace some components on a 20+ year old pcb, but my
> solder won't stick to anything (other components or existing joints).
> It just dries into little spheres and rolls off.
> Any advice?
>
> Thanks,
> Chris
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