[RFI] Question about excess cable length & RFI

[Dave Cole (NK7Z)]

I try and coil my excess power cords, etc on ferrite cores...  Maybe 6 
to 8 turns, on each core.

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 01/08/2018 08:06 PM, Jim Brown wrote:
> Hi Greg,
> 
> Before you do ANYTHING:
> 
> 1) Buy and study the new ARRL Book on Grounding and Bonding;
> or:
> 2) Download and study the slides for my tutorial talk on that topic
> http://k9yc.com/GroundingAndAudio.pdf
> 
> AND
> 
> 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 
> short.
> 
> 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
>> WB7DUO
>>
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> 
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