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The 1277-C40 from TRM Microwave is a Dual Directional Coupler with Frequency 1.5 to 32 MHz, Coupling 40 dB, Coupling Variation ± 0.5 dB, Directivity 30 dB, Insertion Loss 0.05 dB. More details for 1277-C40 can be seen below.
50 dB, 300 W Dual Directional Coupler
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