CB RADIO LOW PASS FILTERS : What is a "Low Pass Filter". In simple terms, it's a device you plug in between your cb radio and the antenna that reduces interference to nearby electrical devices. If your cb radio is coming over your neighbor's tv, telephone or other devices, a low pass filter may reduce or totally remove the interference. A low pass filter filters out signals that you do not want transmitted from your station. CB Radio is on 27 Mhz. Most Low Pass Filters filter out all signals above 50 Mhz. Cb Radio filters are used to combat RFI (radio frequency interference) & TVI (television interference)

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