From: bill.sloman@ieee.org   
      
   On 2/12/2025 5:05 am, Joerg wrote:   
   > On 11/29/25 9:38 PM, Bill Sloman wrote:   
   >> On 30/11/2025 6:17 am, Joerg wrote:   
   >>> On 11/29/25 3:38 AM, Bill Sloman wrote:   
   >   
   > [...]   
   >   
   >   
   >>>> There's nothing boring about EMC.   
   >>>   
   >>> After a dozen times of telling people not to use anodized aluminum   
   >>> for gear that needs to shield and they did it anyhow it does become   
   >>> boring. Then, explaining for the umpteenth time that split grounds do   
   >>> not work and that pigtail ground connections have close to zero   
   >>> effect at VHF and up.   
   >>   
   >> That's not EMC - that's just human stupidity. You need to hire a   
   >> primary school teacher (albeit one with electronics skills) and let   
   >> them handle those kinds of jobs.   
   >   
   > They do not know this. They see a metal enclosure and assume it's almost   
   > like a Faraday cage for RF. Yet it isn't, because of a tiny detail in   
   > the surface processing. I have met scores of seasoned engineers who did   
   > not know this. Except in defense-related companies, there everyone knew.   
      
   Active RFI testing does make it obvious.   
      
   Hunting for interference inside a machine is less well-structured, but   
   if you do it often enough you can eventually get to learn what to look for.   
      
   --   
   Bill Sloman, Sydney   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)