The RMK-5-51+ from Mini Circuits is a Frequency Multiplier with Input Frequency 7.5 to 10.5 MHz, Output Frequency 37.5 to 52.5 MHz, Input Power 0 to 5 dBm, Harmonics -1.3 to 43.8 dBc, Conversion Loss 22.9 to 26 dB. Tags: Surface Mount. More details for RMK-5-51+ can be seen below.