Ключевые слова: amp, amplification, amplifier, analog, anode, antique, audio, back light, broadcasting, bulb, cathode, closeup, component, device, diode, electric, electrical, electricity, electron, electronic, electronics, filament, glass, glowing, heat, hi fi, iridescence, lamp, light, music, obsolete, old, power, professional, quality, radio, retro, science, sound, stereo, technology, transistor, triode, tube, vacuum, valve, vintage, voltage,