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The TC4-1WG2 from Mini Circuits is a Balun with Frequency 3 to 800 MHz, Impedance Ratio (Num) 1:4, Insertion Loss 1 dB. Tags: Unbalanced to Balanced. More details for TC4-1WG2 can be seen below.
1:1 Transmission Line Transformer from 45 to 1200 MHz
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