[RFI] Question about excess cable length & RFI

[Roger (K8RI)]

It's always nice to neaten things up, but EVERY TIME  I have neatened up 
that mass of cables I have ended up with problems with the station in 
Breckenridge. http://www.rogerhalstead.com/ham_files/boat1.htm ,

Jim's tutorial would have been a great help back then.  Of course the 
ferite cores weren't available.

Such has not been the case here in Midland.
http://www.rogerhalstead.com/ham_files/boat8.htm

Here's a partial list 
http://www.rogerhalstead.com/ham_files/boatanch.htm  Regrettably, I have 
no photos of my earlier stations.
I just let the excess hang. Often, I just pull enough out of the 
original bundle to reach.  I've not had to resort to chokes in any 
leads, except the common mode chokes in feedlines.

If it aint broke, don't fix it!  "IF NEEDED" those chokes work great.

73, Roger (K8RI)

On 1/8/2018 Monday 11:46 PM, Dave Cole (NK7Z) wrote:
> 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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-- 
Roger (K8RI)


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