This is the radio interference from data transmission between 2 Devolo HomePlug powerline adaptors as can be heard on the 25m shortwave band at 11.705 MHz. Starting at around 80 meters from the house walking towards the house where the powerline adaptors are installed (2′nd floor). As you can see the radio interference from these units are severe, and blocks out the broadcast station at a distance of around 30-40 meters from the house. Has EMC reqirements and protection of radio services …
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Isn’t that awful.
They don’t warn about this in the adverts.