KBRF – 100 Radio Frequency
Model KBRF-100 is an RFI filter used to suppress electronic interference caused by motor speed controls. Most speed controls utilize SCR’s that switch on and off rapidly causing high frequency interference pulses. These pulses are easily transmitted through the AC power lines which can then enter other equipment wired to the same line. In addition, once the interference is allowed to conduct through the power lines, the wires become radio antennas which actually radiate electromagnetic energy through the air. The energy, whether conducted or radiated, is called radio frequency interference and is most pronounced between, 5MHz – 1.5MHz, which is the AM broadcast band.