[RFI] Powerline noise question

[nm8rmedic]

All,Don't overlook the audio waveform 'oscilloscope' functionality of the IC705 as a means of identifying 60 and 120 Hz components of an arcing source.  It's all there, in one easily portable package.I second NK7Z's use of the '705.  Mine in combination with a National HFDF loop system made it easy to track down the 6 M Wireless headset interference I was experiencing.  Ed and Steve of the ARRL were very helpful in that endeavor.ScottNM8RSent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Steve Muenich <srmuenich at gmail.com> Date: 12/30/22  16:25  (GMT-05:00) To: rfi at contesting.com Subject: Re: [RFI] Powerline noise question Guys,This has been a very enlightening discussion.  And has given me ideas ontracking down my local RFI issue.I have a IC-9700 and have been using a 3 element VHF measuring tape yagi tolocate the power line noise source.  Adding in attenuation using AMdetector as I get closer to the source.A question I have is:Is there anywhere on the web or perhaps at ARRL where similar signatures ofvarious 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 aswitch mode supply vs a grow light on a waterfall or whatever might helpnarrow down the search.I have a local source that seems to be on a timer and the waterfall shows asquiggly pattern.Just a thought.Thanks again for all this excellent discussion73Steve NA5COn Fri, Dec 30, 2022 at 2:59 PM Steve Muenich <srmuenich at gmail.com> wrote:> 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> > _______________________________________________> > RFI mailing list> > RFI at contesting.com> > http://lists.contesting.com/mailman/listinfo/rfi>_______________________________________________RFI mailing listRFI at contesting.comhttp://lists.contesting.com/mailman/listinfo/rfi