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  • Sonatron 3 Tube Amplifier
    Sonatron made very interesting and at this date, somewhat rare amplifier units with red, white, and blue colored tubes that made for a outstanding marketing scheme. The buyer could choose what their MU tubes to be included with his purchase according to what was needed, higher volume, tone quality, high amplification, etc. It is also…
  • W. E. & M’s UV 201 Vacuum Tube
    George Westinghouse, (1846-1914), industrialist extraordinaire, had the business acumen to start many business ventures that changed people’s lives. In 1884 he formed the Westinghouse Electric and Manufacturing Company, later to be known as the Westinghouse Electric Company. This article will concentrate on the vacuum tube division of W. E. & M and its subsidiary, Westinghouse…
  • Robert Von Lieben and the LRS Relay
    Contrary to popular belief, Robert Von Lieben, was the first to design and patent a triode amplifier valve. His triode amplifier patent, numbered 179,807, was published on Nov., 18th, 1906 in Germany. By contrast, DeForest had a working audion triode in his lab on Dec., 30th, 1906. He filed for a patent on Jan., 29th,…
  • Libby’s test for PDF thumbnail
  • An Audion by British Thomson-Houston?
    This author has scanned all the magazines that appear on this website and many had very interesting articles like this one that Fin Stewart submitted in Vol. 14, No 2, April, 2012. Fin Stewart quote: “I picked up a mint copy of the book: BTH, Reminiscences – Sixty Years of Progress published in 1946, and…