[RFI] New Interference at kk0sd

[Charles Plunk]

I see where you stated the util's are underground, my bad. At least with 
the util's underground it will reduce the chance you are chasing the 
wrong noise. Keep us informed, be interesting to know what you find. Don 
had some great info there. I agree with his assessment of the audio.

Chuck
AF4O

On 3/21/21 3:28 PM, Charles Plunk wrote:
> Its sounds like 120hz to me (power lines ). I recorded a segment and 
> run it through Audacity, expanded it out, and can see the spikes at 
> about that rate. No street views on google for your QTH but from 
> satellite it looks like your util's are underground? That commercial 
> facility close to you that was previously mentioned might be the 
> source or some arc in a neighbors house (could be dangerous, you could 
> do someone a big favor but it maybe hard convincing them of that).
>
> Time to triangulate I suppose. Oh, no offense, but I had a FT847 and 
> the noise blanker on it did not work well for me. A good NB IMO can 
> help a lot until you find the source. Also a null type noise 
> suppressor (ANC-4, etc) can help but are much more tricky to use than 
> a NB. Best NB's I have are in order TS-830s, Triton IV, IC-7100.
>
> Unless you live on acreage that you control or are lucky to have a 
> util with the equipment and knowledgeable person working there, its 
> getting to where hams need to budget for and/or build their own rfi 
> location equipment. I have....
>
> 73
>
> Chuck
> AF4O
>
>
> On 3/21/21 1:01 PM, Gary wrote:
>> My last problem was tracked down to a neon sign in a neighbors 
>> garage. I had several months of blissful relatively low noise 
>> operation, but now have a new RFI issue.
>>
>> You can see a recording of it here:
>> https://www.youtube.com/watch?v=GKf4P44FXMo
>>
>> I have turned all of the breakers in my home off and run the radio 
>> from a battery and the noise remains.
>>
>> My neighborhood utilities are all underground.
>>
>> There are no solar installations in my neighborhood, and the noise is 
>> there at night anyway...
>>
>> The noise is not detectable on the AM broadcast band, but starts 
>> around 2 MHz and runs to at least 6 meters.
>>
>> It is there 7 days a week 24 hours a day.
>>
>> It is not detectable from my pickup when I drive the streets of my 
>> neighborhood (checking both AM broadcast and Shortwave).
>>
>> If any one has heard something like this, I would love to hear what 
>> you found.
>>
>> Thank You for your input and help!
>>
>> 73,
>> Gary "Joe",  kk0sd
>>
>>
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