Jun 20, 2016
RCA Victor
Matchbook with image of human head with tubes inside, green eye superimposed.
Magic Brain Radio
MAGIC BRAIN MAGIC EYE METAL TUBES World's Greatest Radio Value
seen from Türkiye
seen from Netherlands
seen from Germany
seen from China
seen from Netherlands
seen from Netherlands
seen from Türkiye
seen from Russia
seen from Germany
seen from United States
seen from China
seen from United Kingdom
seen from Malaysia
seen from Germany
seen from Türkiye
seen from Russia
seen from United States
seen from United States
seen from France
seen from Moldova
RCA Victor
Matchbook with image of human head with tubes inside, green eye superimposed.
Magic Brain Radio
MAGIC BRAIN MAGIC EYE METAL TUBES World's Greatest Radio Value
50-D recifiers, circa 1930s
Mervin Kelly (left) with William Wilson and a vacuum tube, 1928.
Rudolf Kompfner (center), inventor of the traveling wave tube, discusses the theory of the tube with John R. Pierce (left) and Harry Nyquist, 1960.
Fleming Electron Tube, 1906