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
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>
--
*Dave - WØLEV*
*Just Let Darwin Work*
*Just Think*
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