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Audio Oscillator 200B

Audio Oscillator 200B; Hewlett-Packard, HP; (ID = 1501294) Ausrüstung
Audio Oscillator 200B; Hewlett-Packard, HP; (ID = 435311) Ausrüstung Audio Oscillator 200B; Hewlett-Packard, HP; (ID = 1500827) Ausrüstung
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Audio Oscillator 200B; Hewlett-Packard, HP; (ID = 435311) Ausrüstung
Hewlett-Packard, HP;: Audio Oscillator 200B [Ausrüstung] ID = 435311 424x412
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Für Modell Audio Oscillator 200B, Hewlett-Packard, (HP); Palo Alto, CA:
Quelle: HP Vitual Museum
 
Land:  USA
Hersteller / Marke:  Hewlett-Packard, (HP); Palo Alto, CA
Jahr: 1939 Kategorie: Service- oder Labor-Ausrüstung
Röhren 5: 6J7 6F6 6F5 6V6 5Z4
Hauptprinzip Spezielle Schaltung? Bitte bei Bemerkung nachtragen.
Spezialitäten
Betriebsart / Volt Wechselstromspeisung / 115 Volt
Lautsprecher - Für Kopfhörer oder NF-Verstärker
Belastbarkeit / Leistung
von Radiomuseum.org Modell: Audio Oscillator 200B - Hewlett-Packard, HP; Palo Alto
Material Metallausführung
Form Tischgerät ohne Drucktasten, bis 35 cm Breite (Kleingerät, meist dekorativ. Nur für Netzbetrieb, doch Transportgriff möglich).
Bemerkung

Hewlett-Packard's first product, 200A has a range of 20 Hz to 20 kHz and 200B can distribute 35 Hz to 35 kHz. General Radio before was the leader for RC-audio generators and other bench instruments. The incandescent lamp of 110 Volts and 3 Watts in the cathode path stabilized the result very efficient in a way that HP soon became a leader for this type of instrument.

Info on HPs page:
See also Bill Hewlett's prototype resistance-capacity oscillator from 1938 and the 200A audio oscillator.
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. Disney ordered eight of the Model 200B at $71.50 each.

The Model 200A began as the subject of Bill Hewlett's master's thesis at Stanford University in the late 1930s. Bill had the innovative, elegant and practical idea of using a light bulb in a Wien bridge oscillator circuit to solve the problem of how to regulate the output of the circuit without causing distortion. Other oscillators that were available at that time were costly and unstable. By the clever use of the light bulb, Bill was able to simplify the circuit, improve the oscillator's performance and reduce the price.

Some 200B were produced for the Naval Research Laboratories during World War II.

see Forum

Originalpreis 72.00 $

Modellseite von Ernst Erb angelegt. Siehe bei "Änderungsvorschlag" für weitere Mitarbeit.



Alle gelisteten Radios usw. von Hewlett-Packard, (HP); Palo Alto, CA
Hier finden Sie 356 Modelle, davon 322 mit Bildern und 123 mit Schaltbildern.



  
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