Topband: Home Depot LED bulb interference.

[DAVID CUTHBERT]

LED lighting has the potential to become the main MF/HF noise source for
us.

FCC *radiated noise* limit testing can produce much lower measured levels
than some consumer installations.

The driver for consumer installations is *conducted noise*. For LED
lighting this should be almost all differential-mode and that is not a huge
problem until there is differential-mode to common-mode conversion in AC
wiring asymmetries. If the 1 mV FCC conducted EMI limit (1.6 to 30 MHz) is
reached with a common-mode a signal, a signal of 20 dB over S-9 can be
induced into a 1.8 MHz dipole 50 feet away. Imagine dozens of these LED
lamps nearby and in your own house.

     Dave WX7G