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The ETC1.6-4-2-3 from MACOM is a Balun with Frequency 500 to 2500 MHz, Impedance Ratio (Num) 1:4, Insertion Loss 3 dB. More details for ETC1.6-4-2-3 can be seen below.
1:1 Transmission Line Transformer from 45 to 1200 MHz
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