131 votesJames Pinion commented
Someone needs to enforce rfi and emf standards on equipment sold in the US. Magic jack is a terrible offender. I know because I own one. If the power supply is turned on I get S9 noise all across the HF, and VHF bands. When I unplug it noise drops to around S1 to S3 instantly. Another offender are cheap LED line powered bulbs and LED monitors. But CFL's are not producing the noise as much as they did when they were first introduced. CE listed monitors and devices should meet CE standards. Cable modems and routers also add to the noise. However all of these together do not add up to the rf noise of 1 magic jack in my home.