Schematic for Success: The HP200A

Schematic for the HP 200A audio oscillator. Enlarge
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Date: 1939

Bill Hewlett drew this schematic for Hewlett-Packard’s first product by hand. It is dated January 26, 1939.

Tags: 1930s • 1939 • 200A • Bill Hewlett • Oscillator

( C ) HPCA

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