HIFI AUDIO TUBE AMPLIFIER
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United States of America Patent
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Issued Date -
Mar 23, 2017
app pub date -
Sep 16, 2016
filing date -
Sep 21, 2015
priority date (Note) -
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Abstract
A casing unit is provided that includes a cylindrical peripheral wall portion of quartz or glass, a cover of metal, and a fixing unit configured to fix the casing unit in or to a housing of a hi-fi tube amplifier. Also provided is a hi-fi audio tube amplifier that includes a plurality of tubes configured to amplify audio signals, and a plurality of the afore-mentioned casing units. Each casing unit encloses one tube of the plurality tubes at three sides, and the fixing unit of each casing unit is configured to fix the respective casing unit in or to a housing of the hi-fi audio tube amplifier.
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