[RFI] FCC Complaint Filing

[Dan K2YWE]

I feel ya

On Sat, Nov 23, 2019, 7:26 PM David Eckhardt <davearea51a at gmail.com> wrote:

> I couldn't agree with you more.  30 dBuV is a rather strong signal.  And,
> yes, the LISNs do not represent real world conditions, but at least they
> are a standard with to measure.  There is a LOT I do not agree with from a
> technical standpoint with the prescribed setups for both RE and CE, but I
> refuse(ed) to sit on committees where politics rule over physics.  And I'm
> too old and crotchety to do so now.
>
> Dave
>
> On Sun, Nov 24, 2019 at 12:08 AM Dan K2YWE <dan.k2ywe at gmail.com> wrote:
>
>> From my long but now somewhat ancient experience, a major problem with
>> regulating conducted emissions is that compliance is measured under very
>> specific conditions using line stabilization networks which may not have
>> much relevance to the real world environment in which they will be used.
>> Devices may be compliant but still cause havoc.
>>
>> On Sat, Nov 23, 2019, 6:56 PM Dave Cole <dave at nk7z.net> wrote:
>>
>> > Dave,
>> > The slides were not attached, can you send them directly to me please, I
>> > would like to see your presentation.
>> >
>> > 73, and thanks,
>> > Dave (NK7Z)
>> > https://www.nk7z.net
>> > ARRL Volunteer Examiner
>> > ARRL Technical Specialist
>> > ARRL Asst. Director, NW Division, Technical Resources
>> >
>> > On 11/23/19 3:27 PM, David Eckhardt wrote:
>> > > Quate:
>> > >            "cable shields are improperly terminated to the circuit
>> board
>> > > rather than to the shielding enclosure."
>> > >
>> > > This is the NUMBER ONE error the latest crop of designers make.  The
>> best
>> > > way to violate the Faraday Cage they believe they have (had).  In so
>> > doing,
>> > > THEY'VE VIOLATED MR. FARADAY ! ! !
>> > >
>> > > If the neighbor is causing interference, it is radiated from the
>> > neighbor's
>> > > house wiring into the ham's antenna.   This is especially true if the
>> > > source is blocks away.  However, within the house, yes, the problem is
>> > > conducted 'emissions'.  Attached are thre slides I did for a course I
>> > once
>> > > offered.  Have a look at the enclosure.
>> > >
>> > > Dave - WØLEV
>> > >
>> > > On Sat, Nov 23, 2019 at 7:13 PM Jim Brown <jim at audiosystemsgroup.com>
>> > wrote:
>> > >
>> > >> On 11/23/2019 9:18 AM, David Eckhardt wrote:
>> > >>> Radiated emissions (typically what causes hams interference) is
>> > regulated
>> > >>> and levels specified only at and above 30 MHz.  Below 30 MHz, 150
>> kHz
>> > >>> through 29.99999.... MHz, conducted energy is specified and
>> measured.
>> > >>
>> > >> This is NOT correct. CONDUCTED emissions are the primary cause of
>> RFI at
>> > >> all frequencies, but especially below 30 MHz, through a mechanism
>> first
>> > >> identified in the world of pro audio as "The Pin One Problem,"
>> whereby
>> > >> cable shields are improperly terminated to the circuit board rather
>> than
>> > >> to the shielding enclosure. The same error is also quite common with
>> the
>> > >> Green Wire for power wiring.
>> > >>
>> > >> Detail on this at k9yc.com/publish.htm
>> > >>
>> > >> 73, Jim K9YC
>> > >> _______________________________________________
>> > >> RFI mailing list
>> > >> RFI at contesting.com
>> > >> http://lists.contesting.com/mailman/listinfo/rfi
>> > >>
>> > >
>> > >
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>
>
> --
>
> *Dave - WØLEV*
> *Just Let Darwin Work*
> *Just Think*
>