Thanks Jim.
Some others have also already suggested a linear power supply. I'll
probably try that, but I'm strongly considering just moving my antenna much
further away from my house, so I can spend less time trying to kill RFI.
On Fri, Apr 2, 2021 at 8:49 PM Jim Brown <jim@audiosystemsgroup.com> wrote:
> That's because it's a switch-mode power supply. What voltage and
> current? Depending on that, it may be possible to re-purpose an old
> linear wall wart. Also, study my tutorials on chasing and killing RFI.
> They include specific advice on subbing the linear supply.
>
> Text: http://k9yc.com/KillingReceiveNoise.pdf
> Slides: http://k9yc.com/KillingRXNoiseVisalia.pdf
>
> 73, Jim K9YC
>
> On 4/2/2021 5:15 PM, David Gottschalk wrote:
> > I'm wondering if anyone has had success finding a wall wart for a
> Raspberry
> > Pi that doesn't make horrific RFI on HF (or really any switch mode power
> > supply that isn't noisy!)
> >
> > I recently discovered the wall wart for my Raspberry PI (that is mounted
> > outside in a water proof enclosure for my 4G internet) is making S7 level
> > noise on 80m. Unfortunately, my 80m loop is currently pretty close to it.
> > When the PI is battery powered, or off, it's S4 noise level here (This is
> > in the middle of the day). 60m also seems to be severely affected as
> well.
> >
> > I found this on Amazon, but it seems like it's more of a AC line
> > conditioner, but might be worth a shot. Any feedback would be greatly
> > appreciated.
> >
> >
> https://www.amazon.com/iPower-Supply-International-Travel-Adapters/dp/B01GNNXP0Y?ref_=ast_sto_dp&th=1
> >
> > 73,
> > David
> > KN4ZKT
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> >
>
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