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The HDL-59-30 from MCLI is a Dual Directional Coupler with Coupling 30 dB, Frequency 1 to 500 MHz, Average Power 30 W, Insertion Loss 0.9 dB, Directivity 20 dB. More details for HDL-59-30 can be seen below.
50 dB, 300 W Dual Directional Coupler
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