[RFI] Question about common mode noise

[Jim Brown]

Thanks, Dave. Yes. My colleague Neil Muncy, ex-W3WJE, (SK) reminded 
attendees of his EMC workshops that "the earth is not a SUMP into which 
hum, buzz, and RFI is poured."

Another of his great admonitions in those classes was, "Grab a six-pack 
and park at the end of a runway at O'Hare (substitute the local airport 
for other class locations) and call me collect when you see an aircraft 
taking off trailing a ground wire," and reminding attendees that many 
complex systems all work just fine. (Except in my experience, for 
in-flight headphone systems, which I remember often with noise/buzz.)

73, Jim K9YC

On 1/22/2025 10:57 AM, David Eckhardt wrote:
> What's even more, common mode noise also raises his receive noise 
> floor.  Again, proper installation and the proper use of a balun or CMCs 
> should fix the problem.  Far,........, FAR too many hams do not properly 
> reason through a problem but just "throw" a ground into the mess.