The circuit diagram is shown in Hewlett’s patent. Views Read Edit View history. Frequency and amplitude stabilization of an oscillator with no tube overloading. This electronics-related article is a stub. Through the s and into the s, the subsequent versions of the A covered different and wider frequency ranges.
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Earlier, Meacham had used auxio bulbs in bridge circuits to stabilize and linearize oscillators in It was a low-distortion audio oscillator used for testing sound equipment. You can download the latest version or download a version with accessibility features.
The product code was chosen to give the impression that HP was an established company.
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From Wikipedia, the free encyclopedia. The latter is a key technique for achieving a low distortion oscillator. Dubbed the A to make it seem like the company had been around for a while, this instrument represented the first low-cost method of measuring audio frequencies. Other oscillators that were available at that time were costly and unstable. Uses tungsten lamp to balance bridge. The CD became a ubiquitous audio generator in engineering laboratories worldwide from the s to the s. Retrieved from ” https: Bill had the innovative, elegant and practical idea of using a light bulb in a Wein bridge oscillator circuit to solve the problem of how to regulate the output of the circuit aduio causing distortion.
An audio oscillator is an instrument that generates one pure tone or frequency at a time. Bill and Dave made the audko of these in the garage behind Dave’s house and baked the paint on the panels in Lucile Packard’s oven.
Using this site means you accept its terms. Through the s and into the s, the subsequent versions of the A covered different and wider frequency ranges.
Through the years, HP oscillators were used to design, produce and maintain telephones, stereos, radios and audil audio equipment. By the clever use of the light bulb, Bill was able to simplify the circuit, improve the oscillator’s performance and reduce the price.
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Frequency and amplitude stabilization of an oscillator with no tube overloading.
You can help Wikipedia by expanding it. Acrobat Reader is a free plug-in. Views Read Edit View history. This page was last edited on 16 Octoberat It was also the first such commercial oscillator to use a simple light bulb as the temperature-dependent resistor in its feedback network. Hewlett-Packard products Electronic oscillators Products introduced in Electronics stubs.
This electronics-related article is a stub.
Read a story on the 60th anniversary of the patent for the A originally published on hp NOW, an internal HP web site. The QuickTime plug-in is needed to view this presentation.
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In other projects Wikimedia Commons. Vault guide to the top tech employers. The Model A was HP ‘s first product.
Lucile claimed the roast beef never tasted right after Bill and Dave started using the oven as HP’s first paint-baking facility.
In a letter, Dave described Hewlett’s audio oscillator as “the foundation on which Hewlett-Packard Company was able to grow into the largest manufacturer of electronic instruments in the world, the keystone that allowed four aufio one-half decades of major contributions to electronic measurement technology and equipment. It used the H; bridge oscillator circuit, that had been the subject of Bill Hewlett ‘s Masters thesis.