[RFI] Sudden Computer Racket

[Jim Brown]

On Sun, 27 Jun 2010 11:04:20 -0500, K4RO Kirk Pickering wrote:

>The problem is compounded by the cables
>and equipment plugged into the Delta 1010, which act as antennas.

Hi Kirk,

You can greating reduce the radiation from those antennas with suitable 
ferrite chokes tuned to the bands where you hear the trash. See my RFI 
tutorial for specifics. This won't help radiation from the sound card 
itself due to poor shielding of the PC that it's plugged into, but it 
will help with trash from those external cables. If you haven't already 
done so, it may also help to choke other cables connected to the 
computer -- thanks to pin 1 problems, RF comes out on virtually any 
cable that leaves a box that has a clock. :)

73, Jim Brown K9YC