Programmable controls for vacuum tube preamplifier
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United States of America Patent
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May 4, 1993
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N/A
app pub date -
May 8, 1992
filing date -
May 8, 1992
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Abstract
Light Dependent Resistors (LDR's) are used together with a differential amplifier and a plurality of reference resistors to replace conventional analog potentiometer controls and thus offer digital activation and programmability to a traditional style vacuum tube preamplifier.
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