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Hewlett-Packard Company 1943 vintage electrical ad noise distortion

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<p>Original 1943 electrical trade vintage ad for<b><span style="font-size: 14px;">&nbsp;HEWLETT-PACKARD COMPANY.&nbsp;&nbsp;</span></b>Main office and plant was located in Palo Alto, CA.</p><p> Manufacturers of Test Instruments. </p><p>Products include: <b>Model 325B Noise and Distortion Analyzer</b> - Almost indispensable for laboratories or production tests in the audio frequency field. Measures total harmonic distortion at nine specific frequencies, measures noise and hum level in A.F. equipment, used as a vacuum tube voltmeter, and used as a high gain amplifier.</p><p>Product images, descriptions, applications and specifications provide extensive product details. </p><p>Unbound from a 1943 electrical engineering magazine, this unique old one-page advertisement would display beautifully matted and framed. Nice graphics.&nbsp;World War 2 propaganda. A fabulous addition to your retro electrical library.<br></p>
    • SKU zl433
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