Free Images: "bestof:soviet radar tube vacuum modulator tetrode cold war electronics amplifier component gmi-2b"
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1630 Orbital Beam Amplifier Tube, RCA, World War II - National Electronics Museum - DSC00144.JPG
RJ-557 Amplifier Tube, Westinghouse - National Electronics Museum - DSC00168.JPG
5D21 Power Tetrode, Raytheon, World War II - National Electronics Museum - DSC00136.JPG
725A Magnetron Tube, Raytheon, World War II - National Electronics Museum - DSC00140.JPG
WL417A Klyston Oscillator Tube, Westinghouse, World War II - National Electronics Museum - DSC00146.JPG
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