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Re: [RFI] FCC Complaint Filing

To: rfi@contesting.com
Subject: Re: [RFI] FCC Complaint Filing
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sat, 23 Nov 2019 11:13:25 -0800
List-post: <mailto:rfi@contesting.com>
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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