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Vacuum Tubes

Vacuum Tubes


    Vacuum tubes, or electron tubes, are analog devices used to control and modify the flow of electricity. They were invented in the early 1900s based on similar principles of the incandescent lightbulbs. As current flows into the airless glass bulb, electrons radiate from a heated cathode and are attracted to an anode before leaving the tube. Since the anode is not heated, it will not re- emit electrons, forming an electrical one- way valve. This is the simplest version of a vacuum tube, but once electrical flow can be controlled in this way, additional elements can be added to modify the current to perform other functions.

    This was key to the development of radios, TVs, radars, etc.

    As technology advanced, transistors eventually replaced tubes. 

     Helped create modern electronics, but are now novelty items. Put on your desk to invoke curiosity and invite interesting conversation.

    Look up the model number of you tube to find out it's function! 

     

    Please allow for slight variations in appearance. These come in their original boxes. 

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      Collections containing this item: Electricity | Engineering |

      Customer Reviews

      Based on 4 reviews
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      E
      E.G. (Virginia, United States)

      As described. A neat piece of history!

      D
      D.M. (Virginia, United States)

      Bf is upsessed thank you so much!!

      D
      D.S. (Quebec, Canada)
      Tubes of glory

      The tubes were particularly augmented with the included original packaging. The period packaging design really made the experience of having these antiquated technology parts even more rewarding. I am interested in the aesthetic quality of the vacuum tubes. I was glad to get a rebate in the shipping only to be charged almost the same amount from customs.
      Cheers. Douglas

      D
      D.R. (Ohio, United States)
      Wonderful collectable

      My Dad did television repair when I was a kid. He had shelves of these tubes at the shop. I bought this to reminisce, and because these items are fascinating remnants (unless you use a tube amp for your guitar). Great condition and even came in the old box!

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