[Elecraft] Cleaning Solder Flux, Redux

[CUTTER DAVID]

Ted 
If the residue is clear, don't bother, you might create more damage than you realise (ESD).  If the residue is brown, you've been using the wrong solder.  If you really feel the desire for aesthetics then you can can brush it with IPA, but beware ESD if there are sensitive components on board.  Also beware some components can dissolve in some cleaners, eg old style polystyrene capacitors.   

73 and HNY 
David G3UNA

> On 31 December 2021 at 20:52 edauer at aya.yale.edu wrote:
> 
> 
>  
> 
> Is there a consensus among builders of the traditional kits (K1, K2, etc)
> about the best way to remove solder flux from a completed circuit board?
> Some Internet sites recommend acetone, others say isopropyl alcohol. A few
> tout their own product without saying exactly what it is.  I remember
> reading someplace that one or the other of those will clean the flux but
> could also cause damage by being absorbed into components.  Yes, I know this
> is all purely cosmetic but if it can be done safely I'd like to try it on
> the next kit.  Suggestions?
> 
>  
> 
> Thanks,
> 
>  
> 
> Ted, KN1CBR
> 
>  
> 
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