Ключевые слова: amplifier, ancient, anode, audio, background, black, broadcasting, bulb, cathode, component, diode, electrical, electricity, electron, electronics, engineering, equipment, glass, glowing, history, hot, industrial, industry, isolated, lamp, light, metal, obsolete, old, one, pentode, radio, retro, revival, science, technology, television, triode, tube, vacuum, valve, vintage, white,