The FDF-4A-1500 from Crane Aerospace & Electronics is a Frequency Multiplier with Output Frequency 50 to 6000 MHz, Input Power 7 to 16 dBm, Harmonics -30 to -15 dBc, Conversion Loss 12 to 15.5 dB, Frequnecy 25 to 3000 MHz. Tags: Flatpack, Frequency Doubler. More details for FDF-4A-1500 can be seen below.