[RFI] BrightHouse & RFI?

Jim Brown jim at audiosystemsgroup.com
Sun Aug 24 11:37:16 EDT 2008

On Sat, 23 Aug 2008 08:30:18 -0600, Tim Groat wrote:

>It also means there's no minor cases of TVI: 
>either you have no TVI, or an irate neighbor. 

Again, we slip into the trap of viewing TVI as interference with the 
RF signal. In today's world, that rarely happens. 

Instead, RF either couples directly into poorly shielded equipment, 
or excites pin 1 problems in audio systems to interfere with the 
sound. Another VERY common coupling mechanism is loudspeaker wiring 
acting as a receiving antenna, then coupling RF to the power output 
stage, where feedback couples it to the input, where it is detected 
and amplified. 

In my experience, RFI to the audio system is now FAR more prevalent 
than interference with TV reception. YMMV


Jim Brown K9YC

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