Where vacuum tubes work best
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Why do tubes sound different than transistors?
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How to avoid losing bass
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Optimizing Small Room Acoustics
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1968 HOW VACUUM TUBES are Made: English Electric Valve Co EEV Television Radio Radar CRT Cameras
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The secret to good imaging
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How long do tubes last?
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INCREÍBLE método de reparación de plástico. ¡Repara cosas caseras y ahorra dinero! ¡Parece nuevo ...
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