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- 09:12, 7 April 2025 AndreaVdy256223 talk contribs created page Vacuum Cleaner Tubes Needed We Have 5 000 In Supply. (Created page with "For over 40 years, Radio Electric Supply has provided the world with radio and vacuum tubes for every single feasible application. This can be either simply a filament coated with a blend of barium and strontium oxides and other substances, or it can be an "indirectly heated" cathode, which is simply a nickel tube with a covering of these exact same oxides on its outer surface area and a heating filament inside. <br><br>We Supply over 7,800 different radio and and vacuum...")