[RFI] RFI LG Refrig Corcom filter and #31 core

[Don Kirk]

Hi Dave,

All appliances still come under FCC requirements of not causing harmful
interference even if they fall under the unintentional radiator category
and even on the unintentional radiator exemption list as far as I know.

Unfortunately I think this puts the homeowner as the responsible party and
lets the manufacturer off the hook, but I’m no expert on this topic.

Don wd8dsb

On Wed, Sep 29, 2021 at 3:32 PM David Eckhardt <davearea51a at gmail.com>
wrote:

> We had a problem with a new Kitch Aid frig.  RFI throughout HF to 14 MHz.
> A hefty common mode choke "mostly" fixed the problem.
>
> Remember, home appliances are specifically excluded from any obligation to
> FCC requirements.
>
> Dave - WØLEV
>
> On Wed, Sep 29, 2021 at 7:10 PM Mike Wetzel <mjwetzel at comcast.net> wrote:
>
> > My neighbor's LG refrigerator is radiating RFI on 28MHz and Don (WD8DSB)
> > temporarily hooked up a Corcom filter and a cord wrapped around a #31
> > torroid core that eliminated the interference.  I tried contacting LG
> with
> > no success asking them to provide a filter for the refrigerator.
> >
> >
> >
> > Don came up with this APC unit AV C Type 2 see here:
> > https://www.google.com/search?q=apc+av+c+type+2
> > <
> >
> https://www.google.com/search?q=apc+av+c+type+2&ie=utf-8&oe=utf-8&client=ub
> > untu&channel=fs
> > <
> https://www.google.com/search?q=apc+av+c+type+2&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs
> >>
> > &ie=utf-8&oe=utf-8&client=ubuntu&channel=fs
> >
> >
> >
> > It says it has 55db EMI suppression.  I can add a core to a line cord.
> >
> >
> >
> > It seems like a lot of places have the raw filters (Corcom) but they are
> > not
> > available in a package that would be neighbor friendly and instill
> > confidence.
> >
> >
> >
> > Does anyone have any other suppliers of a packaged EMI filter?
> >
> >
> >
> > Mike Martin suggested this could be a nice business opportunity if one
> was
> > to produce such a unit (filter and core).
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Mike W9RE
> >
> >
> >
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> >
>
>
> --
> *Dave - WØLEV*
> *Just Let Darwin Work*
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