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QRM on 40 meters

N4AB
N4AB Member ✭✭
edited October 2019 in SmartSDR for Windows
I know that I have seen this signal on 40 meters before but I can not remember what it was. It seems to be very wide for the CW/Digital portion of the band. What is it?
Al, N4ABimage

Answers

  • william gravett
    william gravett Member
    edited October 2019
    May be interference from your air conditioners controller . I get a similar pattern whenever my ac runs. Also see it on 20m.
  • Dean Davidson
    Dean Davidson Member ✭✭
    edited October 2019
    Some front load washing machines will also do this
  • 9k2od
    9k2od Member
    edited October 2019
    hi there

    your are zooming in tow much .. you should zoom out and that think will despair 

    thanks 

    9k2od
  • Ha Gei
    Ha Gei Member ✭✭✭
    edited October 2019
    i suspect a power supply or inverter stuff the like. 

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