old vacuum tube (electron tube) on graph paper background
Size: 2304px × 3456px
Photo credit: © Militarist / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: ancient, anode, background, big, black, broadcasting, bulb, cathode, component, diode, electrical, electricity, electron, electronics, energy, engineering, equipment, glass, green, history, industrial, industry, isolated, lamp, light, metal, obsolete, paper, radio, retro, science, small, technology, television, triode, tube, vacuum, valve, vintage, white