[RFI] FCC Complaint Filing
jim at audiosystemsgroup.com
Sat Nov 23 14:13:25 EST 2019
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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