Magic eye tube (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Magic eye tube" in English language version.

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comcast.net

"Precise dB Monitoring With Eye Tubes" (PDF). Archived from the original (PDF) on 2012-04-17. Retrieved 2011-07-29.

US 2098231, DuMont, Allen B., "Cathode ray device", published 1932-05-28, issued 1937-11-09
US 2163256, DuMont, Allen B., "Cathode ray tube", published 1934-09-18, issued 1939-06-20
Herbert M. Wagner of R.C.A. invented the familiar form of the "magic eye" tuning vacuum tube: US 2051189, Wagner, H. M., "Tuning indicator tube", published 1935-06-27, issued 1936-08-18

Spangenberg, Karl R. (1948). Vacuum Tubes (PDF). New York: McGraw-Hill Book Co. pp. 723–724.

"Precise dB Monitoring With Eye Tubes" (PDF). Archived from the original (PDF) on 2012-04-17. Retrieved 2011-07-29.