[RFI] Long distance grounding

[Jim Brown]

On Thu, 14 Jun 2007 15:50:37 -0700, Dave Cook wrote:

>The reason I was asking the question is that I have one computer
>that is very suceptible to RFI 

Computer systems, especially sound cards, but also serial ports, are 
notorious for being built with "pin 1 problems." A connection to 
earth is rarely a fix for RFI. Proper shield termination is.   

See http://audiosystemsgroup.com/RFI-Ham.pdf

and http://audiosystemsgroup.com/Pin_1_Revisited.pdf

http://audiosystemsgroup.com/Pin_1_Revisited_Part_2.pdf

Pin 1 problems are also a major cause of hum and buzz in audio 
systems. 

73,

Jim Brown K9YC