For several moths I have been experiencing interferance that covers the whole of the the band 37 to 72 MHz. I am receiving this on My FT847 with a 6M/4M antenna. On SSB this shows up as intermittant noise spikes but when AM is selected it is a solid signal peaking at 20dB over S9. Using the wide graph on WSJT the spectrum obtained is attached. I have satidifed myself that this interferance is not being generated in my property by using an FT817 on battery power and turninfg off the incoming mains supply to the property. The only thing this does leave running is the Smart Meters. Anyone any ideas?