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Can't hear TV dialogue? I found 3 ways to dramatically improve the audio quality
If you find that the dialogue is still unclear, try a Dialog, News, or Speech Boost mode, if available. Sometimes, it even ...
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RCA Tube Handbook HB-3 Vol. 3-4 (1955) - Archive.org
Usage Public Domain Mark 1.0 Topics vacuum tube, RCA HB-3, Thyratron, Ignitron, triode, pentode, transducer, vacuum-rectifier, amplifier, voltage regulator, beam power tube, high-mu triode, ...