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- 06:55, 8 April 2025 ArethaNumbers20 talk contribs created page How Vacuum Cleaner Tubes Work (Created page with "For over 40 years, Radio Electric Supply has actually supplied the globe with radio and vacuum cleaner tubes for every single possible application. This can be either just a filament coated with a mix of barium and strontium oxides and various other compounds, or it can be an "indirectly heated" cathode, which is simply a nickel tube with a finishing of these same oxides on its external surface and a heating filament inside. <br><br>We Stock over 7,800 different radio an...")