Wall Wart RFI Noise Filter Pack (5 filters)
Product Details
MPN: RFI-WW-5
Country/Region of Manufacture: United states
Filter Power Rating (PEP watts): not applicable
RFI Suppression Range (MHz): .1-10 MHz
# Ferrite Filters: 5
Typical Use:: wall wart power supplies - DC side
A simple ferrite ring filter (OD = 1.14", ID = .748") installed on the DC power cable of a wall wart power supply can help suppress the noise interference to nearby electronic devices by suppressing the fundamental switching frequency (usually under 1 MHz) and thereby suppressing harmonics at higher frequencies.. This kit includes 5 filters useful for all types of devices powered by wall wart power supplies including laptop computer, routers, cable modems, wireless phone charges, USB chargers, etc.
Typical user comment:
The filter was quite effective. Was surprised that it actually reduced the noise level more than the signal so S+N/N improved by 1.9 S units. Bill