[RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility.

[Jim Brown]

Great work, Don.  It suggests that there are multiple sources, one much 
stronger than the other, or multiple points at which radiation takes 
place (or the magnetic field is developed). Be prepared for noise from 
one or more weaker sources to still be present after the first one is 
suppressed.

73, Jim K9YC

On 2/4/2018 8:30 AM, Don Kirk wrote:
>   I have to turn the SDR receiver gain all the way down to zero on
> the SDR receiver when I again get in close, but the signal is still very
> large when in close (lets say within 3 inches of the conduits), so I'm now
> going to build a a 1" diameter loop as I suspect it will be helpful when I
> again gain access to the inside of the building where the variable speed
> drives are located.