Most FM transmitters produce harmonics at even multiples of your fundamental frequency. If your harmonics fall on or near a TV channel or Maritime frequency you could cause severe interference to that channel. The most common cause of fines from federal agencies is due to TVI or other interference from your transmitter which generates a complaint.
Use of an LPF1000, 1000 watt low pass filter is the best method of eliminating this kind of interference. The low insertion loss of the LPF-1000 filters makes them well suited for use on power levels as low as 100 watts on up to 1000 watts! Includes our 30-day money-back guarantee and a full 2 year warranty!
Specifications
Input/Output Impedance 50 Ohms
Insertion Loss <0.2dB (0.15dB for LPF1000)
Cut-Off Frequency 120 MHz (-3dB down)
Input/Output Connectors N or SO-239 (7/16″ DIN on LPF1000)
Duty Cycle Rated for continuous operation