The FVR-835 from RF Bay is a Frequency Multiplier with Input Frequency 164 to 170 MHz, Output Frequency 820 to 850 MHz, Harmonics 85 to 98 dBc, Conversion Loss 2 dB, Frequnecy 164 to 170 MHz. Tags: Module with Connectors, Active. More details for FVR-835 can be seen below.