144 MHz LOW PASS FILTER, MAX APPLY POWER 2500 WATT CW, DOUBLE FACE TEFLON SUPPORT, AC/DC POWER LECTURE ( OUTPUT DC VOLTAGE), INSERTION LOSS LESS THAN 0.25 dB, 48 dB BETTER SECOND HARMONIC CUT , 70 dB BETTER THIRD HARMONIC CUT, 30 dB BETTER ADJUSTMENT