[600MRG] photo of noise spikes here on 630M

[Greg KF5N]

Any neighbors install solar cells recently?

73 Greg KF5N

On Sat, Aug 20, 2022 at 12:31 PM John Langridge <kb5njd at gmail.com> wrote:

> Hi Doug,
>
> Just eye-balling the waterfall, these look to be about 60 Hz apart.
> It will be tough to isolate any closer than calling it some type of
> electronic do-dad..... Iphone charger?  Dish TV LNA?  wall wart?
> These seem quite common in suburban environments.  I get similar
> results from a camera battery charger that my xyl uses pretty
> regularly.  We have a rule that she only charges it between about 11am
> and 4pm.
>
> Do the lines sound like carriers?  The ones near 800 and 1000 Hz
> almost look like they have some type of modulation associated off to
> the sides.
>
> Do the signals ever disappear or are they constant?
>
> Have you added anything new in your house in the last two years that
> plugs into the wall?  Something electronic from Amazon perhaps?  New
> internet?
>
> If you are 100% certain that its not in your house (these look strong
> so they may be close!)  and if you have a portable receiver, you might
> be able to figure out where they are NOT originating from and work
> from there (walk around and listen).
>
> just spitballing here...
>
> 73/GL
>
> John..
>
>
>
>
> On 8/20/22, Doug Allen <dougk4ly at gmail.com> wrote:
> > Hey guys,
> > I'm hoping to be able to resume 2-way contacts soon. When I last operated
> > two years ago, I had almost no interference on 630M. Yesterday I
> mentioned
> > the noise spikes from an unknown source outside my home that now hinder
> my
> > 630M reception.  Here's a photo of those noise spikes on both the Flex
> 6500
> > panadapter and on the WSJT-x graph.. You'll also see around 1490 Hz on
> the
> > WSJT-x graph the WSPR signal of N1DAY which is conveniently between noise
> > spikes.  Weak signals on the same frequencies as strong noise spikes
> don't
> > get decoded. The noise spikes are narrow band and equidistant apart, as
> you
> > can see, and some much stronger than others.  Any ideas on what this
> > interference could be or how I might try to trace it down?
> > Doug K4LY
> > Inman, SC
> >
> > [image: 542e7757-d1e8-4a11-bdf4-948ea2bb3475.png]
> >
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