[RFI] Power Line Noise - UPDATE 12/31/24

[K9MA]

In my several decades' experience, the major cause of power line RFI 
have been:

1. Poorly bonded hardware, including incidental contact.

2. Failed lightning arrestors

3. Failed insulators

Number 1 is by far the most common. This has included loose tie wires, 
neutral wires contacting guy wires, and a ground wire contacting a cable 
TV cable. I've not experienced the dreaded staple to ground wire. It's 
possible these are lost in the background, as I'm surrounded by overhead 
distribution lines, with thousands of potential of the three above.

73,
Scott K9MA

On 12/31/2024 8:32 PM, Jim Brown wrote:
> On 12/31/2024 2:49 PM, thoyer1--- via RFI wrote:
>> Turns out it was a bad lightning arrestor (as several suggested)
>
> In a fine ARRL book by an experienced power line noise engineer that I 
> bought about 20 years ago, the author observed that almost all noise 
> generated by power systems is the result of something failing, 
> resulting in arcing, insulators being a common one.
>
> Several years ago, Jeff, AC0C, alerted us to the use of MOVs in 
> distribution lines, and noise resulting when they fail. He sent 
> photos, which I added to my applications note on chasing noise.
>
> 73, Jim K9YC
>
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi


-- 
Scott  K9MA

k9ma at sdellington.us