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Model 200A Audio Oscillator, 1939 | HPE
https://www.hpe.com/us/en/about/history/innovation-gallery/002-product.html
An audio oscillator is an instrument that generates one pure tone or frequency at a time. Through the years, HP oscillators were used to design, produce and maintain telephones, stereos, radios and other audio equipment. The Model 200A began as the subject of Bill Hewlett's master's thesis at Stanford University in the late 1930s.
HP Virtual Museum: Model 200A audio oscillator, 1939 …
https://www.hp.com/hpinfo/abouthp/histnfacts/museum/earlyinstruments/0002/0002history.html
Their initial product was the 200A audio oscillator; It sold for $54.40. Similar equipment built by competitors cost between $200 and $600, a whopping price difference that generated a buzz very quickly. The company's first big sale was an order of eight model 200B audio oscillators to the Walt Disney Company.
Audio Oscillator 200A Equipment Hewlett-Packard, HP;
https://www.radiomuseum.org/r/hp_audio_oscillator_200a.html
The 200A audio oscillator of 1939 is the first product of Hewlett Packard (HP). A US patent Nr. 2268872 was granted to W.R. Hewlett in January 6th 1942, filed in July 11th 1939. An audio oscillator is an instrument that generates one pure tone or frequency at a time.
Hewlett-Packard HP-200A audio oscillator
https://people.ohio.edu/postr/bapix/HP200A.htm
Hewlett-Packard's first product, the HP-200A audio oscillator. After repairing several other Hewlett Packard oscillators such as the HP-200C , the HP-200CD , and the HP-200AB , I chanced upon this HP-200A which is the company's original product. (Link is …
Agilent 200A for Sale|Oscillators|Function Generators|Test ...
https://testequipment.center/Products/Agilent-200A
Agilent 200A Audio Oscillator and other Oscillators for sale at Test Equipment Center. Agilent 200A products for sale at Test Equipment Center are thoroughly tested, and receive electrical and cosmetic reconditioning as needed prior to sale. All products include a 90 day warranty from Test Equipment Center to ensure your complete satisfaction.
HP 200A Manual - The Hewlett Packard Archive
http://www.hparchive.com/Manuals/HP-200A-Manual-1951.pdf
The Model 200A Audio Oscillator consists of an oscillator section, an amplifier section and a power supply. The oscillator section (tubes V1 and V2) is a resistance-tuned type cir- cuit. Basically, this oscillator is a two-stage resistance-coupled amplifier which is caused to oscillate by the use of a positive feedback network.
The 200-A Hewlett-Packard's First Product
http://www.smecc.org/the_200-a_hewlett-packard's_first_product.htm
When Win was asked for commentary on the engineering of Bill Hewlett’s 200A audio oscillator he told us: "It was a very fine idea, and a very timely idea, as it came when the movie sound industry needed it." This refers to the widespread need for a stable and precise audio oscillator.
Audio & Test Oscillator - HP Memory Project
https://www.hpmemoryproject.org/wb_pages/wall_b_page_10a.htm
Evolution of the Bill Hewlett's 200A Audio Oscillator . By the beginning of the 1960s Bill Hewlett's original RC Oscillator had already found many usages in various kinds of electronic instruments. In the 1960 general catalog, the most visible part of this evolution is …
Model 200B audio oscillator, 1939 | HPE
https://www.hpe.com/us/en/about/history/innovation-gallery/008-product.html
Through the years, HP oscillators were used to design, produce and maintain telephones, stereos, radios and other audio equipment. In 1938, when the sound engineer for the movie Fantasia from the Walt Disney Studios saw the Model 200A audio oscillator in action, he asked Bill Hewlett to make some modifications to it, and the Model 200B was born.
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