Identify the component(s) that are noisy. these will generally be ceramic caps.
Once you have found them, encase them in hot melt glue or a rubber mastic compound. This will greatly reduce noise levels On Sun, 2012-06-10 at 14:34 +0200, Stanislav Meduna wrote: > On 10.06.2012 11:05, Jan Ceuleers wrote: > > > The hissing is louder if the network traffic involves the wireless card > > than if it doesn't (Atheros AR922X), but there is also hissing for > > purely wired network traffic. > > 99% of the time the hissing comes from some inductance in a power supply > circuit, changing sound as the power needs (both absolute and structure) > change. Depending on mechanical tolerances the same part can be louder > or quiter. > > There is not much one can do about it. If the surface of the winding > is accessible one can try to tighten a sewing thread around it. There > are also impregnating solutions, but I doubt they can be reasonably > used on parts already soldered in the board. > > Regards -- 73 Brendan EI6IZ _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
