Damon, Well, I certainly hope your flux cleaning efforts have not created problems. It often does create leakage paths that can cause problems. Solder flux by itself is non-conductive, and is best left alone - but when combined with many flux cleaning ?solvents?, conductive paths can be created that will cause insurmountable problems. I have seen attempts at removing flux which resulted in complete failure for the kit. Conductive paths can be created under connectors, under ICs and any other component.
If you want to be safe, *do* *not* attempt to remove solder flux. If it gets really nasty in one area after several re-work attempts, you can remove the excess flux from that area with alcohol applied sparingly with a Q-tip and dried immediately. Use of a solder with a mildly reactive flux will leave almost no flux residue - Kester 285 is one of that type. Kester no-clean solder is another that works well. Save the Kester 44 with its Highly Reactive flux for antenna projects and wires that have developed some oxidation over time - it leaves a lot of flux residue, but cleans nicely - that kind of cleaning is not necessary on new boards and new components. Yes, I know that Elecraft "recommends" Kester 44 (among others), but only because it is OK to use (provided you do not try to remove the flux residue). IMHO, it is not the best choice for new construction. 73, Don W3FPR On 7/24/2011 10:14 PM, KC5CQW wrote: > TNX for the info. > I'll go over your method in detail tomorrow. > I have a hunch it may be due to the R1 SSB balancing pot. > Dummy me forgot to mention that I disassembled the k2 a few months ago to > clean all of the old flux off. > Perhaps the pot has some residue or wasn't setup right to begin with... > > Now that the K2 has settled in, I may go and do a 100% verification on all > adjustable points for max efficiency. (My 12m/10m output is much lower then > expected. 4-5W max). > > 73, Damon > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/k2-Poor-USB-audio-after-cal-tp6616641p6616940.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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 > ______________________________________________________________ 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
