The T3A-20 from Marki Microwave is a RF Mixer with RF Frequency 10 to 20000 MHz, LO Frequency 10 to 20000 MHz, IF Frequency 1 to 5000 MHz, Conversion Loss 8.5 dB, LO/RF Isolation +/-5 dB. Tags: Surface Mount, Triple Balanced Mixer. More details for T3A-20 can be seen below.