I put them in a Word document. Don't know why they weren't attached. Here
you are - see attachment.
Dave - WØLEV
On Sat, Nov 23, 2019 at 11:56 PM Dave Cole <dave@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@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@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/rfi
> >>
> >
> >
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--
*Dave - WØLEV*
*Just Let Darwin Work*
*Just Think*
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