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The 618E from Narda Microwave is a Waveguide to Coax Adapter with Frequency 2.6 to 3.95 GHz, Power 1000 W, Peak Power 20 KW, Weight 1.15 Kg. More details for 618E can be seen below.
1.85mm, 2.4mm and 2.92mm Waveguide to Coax Adapters Operating Up to 65GHz
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