[RFI] Continuous job keeping radio frequencies clean

[Jim Brown]

Thanks for posting your quest, your detective work, and your solution. 
All are classic examples of those sources and what it takes to track and 
kill them.

EVERY power supply should be considered  culprit unless proven 
otherwise. Nearly ALL modern power supplies are swichers, and are 
noisy.  Many/(most?) devices that include digital electronics produce RF 
noise, so they should also be considered a possible culprit unless 
proven otherwise.

RF noise is nearly always RADIATED by wires connected to it. When we 
place a good enough choke on those wires, we greatly reduce the current, 
which greatly reduces the radiated noise. In this case, the main antenna 
was the power line. In other situations, it could be the coax cable 
going to a CATV system, or the audio and/or video wiring to a home 
entertainment system or a TV.

73, Jim K9YC

On Wed,8/10/2016 12:03 PM, Don Kirk wrote:
> Here is a link to the website I just created for documenting the RFI on 160
> meters that I recently tracked down to my neighbors MXQ Smart TV Box /
> Streaming Media Player power supply.
> http://sites.google.com/site/mxqinterference/
>
> The website also contains a link to a youtube video that documents this
> interference.
>
> P.S. Thanks again to K9YC for introducing us to the Fair-Rite #31 mix
> toroid core material, as it once again did a great job.
>
> 73,
> Don Kirk (wd8dsb)
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>