[RFI] Noise on 75 Meters

[W9RPM]

Hi, About 2 weeks ago I started getting some terrible noise on 75 
meters. It is constant, building up, then seems to discharge, but never 
goes away. 20 over when it builds up. Then discharges. It actually seem 
to move around a little. It will drop from 20 over to S7 on the scope, 
then I see it up or down from where it was. Repeats the same all the 
time. Any ideas? Thanks, John W9RPM

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