Ключевые слова: amplifier, anode, antique, backgrounds, bubble, casing, cathode, circuits, construction, control, conversion, design, detection, device, electric field, electrode, electromagnetism, electron flow, electron tube, electronic, electrons, energy, engineering, glass, history, idea, industrial, kinetic energy, magnetic field, microwave, microwave weapons, monument, object, old, power, project, radar, radio, relic, service, signal, styles, system, technology, television, transfer, transmitter, tv, vacuum tube, vintage,