[RFI] Powerline noise question

[Steve Muenich]

Guys,
This has been a very enlightening discussion.  And has given me ideas on tracking down my local RFI issue. 
I have a IC-9700 and have been using a 3 element VHF measuring tape yagi to local.  Adding in attenuation using AM as get closer to the source.  

A question I have is:
Is there any where a location on the web or perhaps at ARRL when similar signatures of various types of noise sources are able to be viewed.  
I haven’t yet looked so this may be redundant but to be able to see a switch mode supply vs a grow light on a waterfall or whatever might help narrow down the search. 

I have a local source that seems to be on a timer and the waterfall shows a squiggly pattern.  

Just a thought.  

Thanks again for all this excellent discussion 

73
Steve NA5C 


Sent from my mobile device

> On Dec 30, 2022, at 2:10 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On 12/30/2022 9:58 AM, Hare, Ed, W1RFI wrote:
>> The SDR waterfall will not be very helpful with power-line noise, but they are great at identifying switching power supply noises and noises that pulse on and off in a regular pattern.
>> Most of the time, though, we are less concerned with "what is it" as we are with "where is it?"
> 
> The principle virtues of the waterfall are recognizing whether it's impulse noise or electronic noise; multiple electronic sources and their active hours so that 1) we know when to chase them and 2) when multiple sources are present, help us chase each individually.
> 
> 73, Jim K9YC
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