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The 4619 from L-3 Narda-MITEQ is a Waveguide to Coax Adapter with Frequency 3.3 to 4.9 GHz, Power 50 W, Peak Power 3 KW, Weight 0.35 Kg. More details for 4619 can be seen below.
1.85mm, 2.4mm and 2.92mm Waveguide to Coax Adapters Operating Up to 65GHz
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