[RFI] white noise starting at 3780 and up

[Jim Brown]

On 7/16/2017 6:52 AM, David Robbins wrote:
> And complaining to AT&T about something that might be their problem and that
> their techs have no idea how to find or fix won't help.

Although I haven't experienced this problem, W0IVJ and W0QE have 
documented it quite well. I strongly suspect that it is a simple "Pin 
One Problem" in the defective equipment (probably the DSL or cable 
modem, but also in the CATV or DSL distro system). If so, it can 
probably be suppressed a lot by ferrite chokes on cables connected to 
the defective equipment. Chokes should be wound using the guidelines in 
my "Choke Cookbook" for the frequencies where the noise is heard. It's 
part of k9yc.com/RFI-Ham.pdf

73, Jim K9YC