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2. RF and microwave filter - Wikipedia

   en.wikipedia.org/wiki/RF_and_microwave_filter

   RF and microwave filter. Radio frequency (RF) and microwave filters represent a class of electronic filter, designed to operate on signals in the megahertz to gigahertz frequency ranges ( medium frequency to extremely high frequency ). It is component that is used in electronic systems to pass or reject specific frequencies and attenuate of ...

3. GE Appliances - Wikipedia

   en.wikipedia.org/wiki/GE_Appliances

   History. GE Appliances was originally a part of General Electric, a company which began marketing a full roster of heating and cooking products in 1907. [ 7] In January 2004, it became part of GE Consumer & Industrial when GE Consumer Products (founded in 1905) merged with GE Industrial Systems (founded in 1930) to form GE Consumer & Industrial.

4. YIG sphere - Wikipedia

   en.wikipedia.org/wiki/YIG_sphere

   Yttrium iron garnet spheres ( YIG spheres) serve as magnetically tunable filters and resonators for microwave frequencies. YIG filters are used for their high Q factors, typically between 100 and 200. [ 1][ 2] A sphere made from a single crystal of synthetic yttrium iron garnet acts as a resonator. The field from an electromagnet changes the ...

5. General Electric - Wikipedia

   en.wikipedia.org/wiki/General_Electric

   General Electric Company ( GE) was an American multinational conglomerate founded in 1892, incorporated in the state of New York and headquartered in Boston. The company had several divisions, including aerospace, energy, healthcare, and finance. [ 7][ 8][ 9][ 10]

6. AOL Mail

   mail.aol.com

   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

7. Vacuum tube - Wikipedia

   en.wikipedia.org/wiki/Vacuum_tube

   A vacuum tube, electron tube, [ 1][ 2][ 3] valve (British usage), or tube (North America) [ 4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a ...