[RFI] Question about excess cable length & RFI

Jim Brown jim at audiosystemsgroup.com
Mon Jan 8 23:06:48 EST 2018

Hi Greg,

Before you do ANYTHING:

1) Buy and study the new ARRL Book on Grounding and Bonding;
2) Download and study the slides for my tutorial talk on that topic


3) Download and study my tutorial on finding and killing receive noise
http://k9yc.com/KillingReceiveNoise.pdf  (Written tutorial)
http://k9yc.com/KillingRXNoiseVisalia.pdf (Slides for talk at Visalia)

Do NOT cut power cables short -- if the gear is noisy, you may need to 
use the extra length to wind ferrite chokes. Bonding cables SHOULD be 

73, Jim K9YC

On 1/8/2018 6:33 PM, Greg Newberry wrote:
> Hello all,
> I've been following the forum for a while and learning a great deal 
> about RF, RFI, etc. So I'm in the process of cleaning up my ham shack. 
> Putting in a SPG (single point ground) and in general, being 
> pro-active about RFI.
> One thing I'm not sure of; what should I do with the excess length of 
> power cords. i.e. A 6ft cord on my computer, but it's only two feet to 
> the outlet. Extra length on wall warts, audio cables etc. ?
> Coil them up, bunch them up? I don't really want to cut them all down 
> to length, as I do move things around.
> Thanks in advance,
> Greg
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