Gentlemen: Water is not a problem. You want the water to pick up the water because alcohol is a non-polar solvent meaning it does not pick up the ionic contamination. The water picks up the ions and alcohol picks up the water. Conclusion rubbing alcohol containing water works just fine although the 50/50 cheap stuff now sold is not as good as the 70/30 or 91/09. Best way to clean is to blot and or air squeegee the liquid off. Don't let it evaporate. That leaves the sold residues behind. When finished cleaning if you still have worries about water then bake out your board at 90 to 95 degrees C. 30 minutes is all that is needed.
73, Fred, AE6QL -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, September 8, 2015 6:15 AM To: 'Ian White'; [email protected] Subject: Re: [Elecraft] KSYN3A mod problem When you purchase alcohol to use as cleanup it's best to get the highest concentration you can get, else, there is a risk of it leaving a residue and the evaporation rate is much slower. Most drug stores sell 91% or higher if you ask/look for it. 60% is more common. Higher % is better for cleaning and evaporates more cleanly. Jer -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Ian White Sent: Tuesday, September 08, 2015 4:09 AM To: [email protected] Subject: Re: [Elecraft] KSYN3A mod problem >Don: >Acetone should NEVER be used in electronic assembles. Acetone causes >both long and short term effects on various components including the >PCB. It effects epoxy, lacquers, paints, and plastics, particularly >polystyrenes [...] >73, Fred, AE6QL Chemicals intended for use around electronic components, including PC boards, have been formulated according to an industry-wide "Non Aggression Agreement". This aims to ensure that chemicals such as flux cleaners and contact cleaners will not damage the plastics that are used in the majority of components. In return, component manufacturers try to avoid using plastics that would be damaged by solvents in common use. Undiluted acetone is not part of that agreement because it's simply too aggressive, as Fred describes. Although electronics-grade solvents are more expensive than bulk commodity solvents like acetone, for peace of mind they are worth the extra cost. 73 from Ian GM3SEK ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
