[RFI] FCC Complaint Filing

Dave Cole dave at nk7z.net
Sat Nov 23 18:56:36 EST 2019

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)
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,
> 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
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