On Thursday 05 January 2017 13:08:54 Jon Elson wrote: > On 01/04/2017 10:07 PM, Gene Heskett wrote: > > I can't think of a thing in that whole kit that would be > > switching at 335 KHz. Except the regulator in the pi's > > power input. > > Trust nothing.
A lesson I am expensively learning. > LCD monitors, especially with CCFL > backlight, are huge noise sources. This is an led model I just bought. An AOC (cheap at half the walmart price) though. But you may be correct in that some of those coaxial half shells on the cabling might be a good test. > Take a small coil (solenoid type, not toroid) and hook it to > a scope probe. Then, wave it around the equipment looking > for the expected frequency. You should be able to quickly > locate the source of the noise. > > That doesn't solve it, of course, but at least once you know > which UNIT is producing it, you should be able to swap out > that unit for a different model. Or insert some longitudinal ferrite blockers. > Jon Sounds like a plan Jon, thanks. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
