The FDF-4C-750 from Crane Aerospace & Electronics is a Frequency Multiplier with Output Frequency 150 to 3000 MHz, Input Power 7 to 16 dBm, Harmonics -50 to -35 dBc, Conversion Loss 11 to 14 dB, Frequnecy 75 to 1500 MHz. Tags: Flatpack, Frequency Doubler. More details for FDF-4C-750 can be seen below.