Off Center Fed (OCF) Antennas

Wall Wart RFI Noise Filter Pack (5 filters)

SKU RFI-WW-5
$16.95
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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.

OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,