RF Man Demo's New 6 Meter/1000 watt LDMOS Board and shows Harmonics with Low Pass Filter installedApril 12, 2021 YouTube Video UC7r5QeuynhXudskQDl7J45w_2aeH2fTjZEU This video measures the harmonic distortion of my new 6 meter LDMOS board with a 5th order Low Pass Filter (LPF) installed.