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National Semiconductor LM340K-18 3-Terminal Positive Regulator, 1A, 18V TO-3

$32.00
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National Semiconductor LM340K-15 3-Terminal Positive Regulator, 1A, 15V TO-3

$25.00
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National Semiconductor LM320K-12 3-Terminal Negative Regulator, 20W, 1A, -12V TO-3

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National Semiconductor LM320K-5.0, 3-Terminal Negative Regulator, 20W, 1A, -5V TO-3

$4.25
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National Semiconductor MM74C157N IC

$3.99
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