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Re: [RFI] Update: Tesla's Response to Solar Panel RFI

To: rfi@contesting.com
Subject: Re: [RFI] Update: Tesla's Response to Solar Panel RFI
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Tue, 17 Dec 2019 22:59:24 -0800
List-post: <mailto:rfi@contesting.com>
On 12/17/2019 9:07 PM, Kim Elmore wrote:
I think Ed (W1RFI) has cautioned us that the FCC long ago decided not to address 
radiated emissions below 30 MHz and that they are unlikely to do so in the future. As 
far as they’re concerned, the HF issue has sailed.

What it boils down to is that

1) Rules were adopted many years ago, with the usual influence from big money.

2) Rules were based on the assumption that nothing exists other than the power line for conducted RF.

3) Test setups are specified in such a manner that fundamental design and construction errors as important and as common as "The Pin One Problem" are never seen or excited. This includes the all too common failure of a "Pin One Like" problem with termination of the Green Wire, and of coax connectors in CATV systems and home entertainment equipment.

And it is #3 that is, by far, the most common and most powerful mechanism for coupling RFI in and out of equipment. It is, for example, the most likely mechanism coupling HF backhaul data in CATV and DSL systems (see page 2 of http://k9yc.com/KillingReceiveNoise.pdf and note the link to work by W0QE and W0IVJ to document it). This stuff is almost certainly common mode current on coax shields, coupled by Pin One Problems at the point of connection, and coupled by I/O circuitry in DSL systems with poor common mode isolation.

73, Jim K9YC
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