The MDM520 from R & K Company Limited is a RF Mixer with LO Frequency 0.5 to 500 MHz, IF Frequency DC to 500 MHz, Conversion Loss 6 to 10 dB, LO Drive - Power 10 dBm, P1dB 6 dBm. Tags: Drop-In, Double Balanced Mixer. More details for MDM520 can be seen below.