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Wide Range Oscillator 200CD early (5 tubes) - Radio Museum
https://www.radiomuseum.org/r/hp_audio_oscillator_200cd.html
Model: Wide Range Oscillator 200CD [early ] - Hewlett-Packard, HP; Palo Alto. Material. Metal case. Shape. Tablemodel, with any shape - general. Dimensions (WHD) 7.3 x 11.5 x 14.3 inch / 185 x 292 x 363 mm. Notes. The Model 200CD and its sister instrument, the Model 200AB, were introduced at the same time in 1952.
Hewlett-Packard HP-200CD audio generator - Ohio University
https://people.ohio.edu/postr/bapix/HP200CD.htm
The Hewlett-Packard HP-200CD audio generator will generate sine waves from 5 Hz to a bit over 600 KHz. That puts its upper ranges right into the broadcast band. It uses a balanced version of the famous light-bulb-stabilized wien bridge oscillator developed by -- you guessed it -- William Hewlett who commercialized it with David Packard.
HP 200CD - Wide Range Oscillator
http://www.ase-museoedelpro.org/Museo_Edelpro/Catalogo/Overview/Test_set/Generator_AF_HP%20200CD.pdf
HP 200CD - Wide Range Oscillator . Wide range low-frequency oscillator, covering from 5 Hz to 600 KHz in five ranges: - X1 5 Hz to 60 Hz - X10 50 Hz to 600 Hz - X100 500 Hz to 6 kHz - X1,000 5 kHz to 60 kHz - X10,000 50 kHz to 600 kHz . Dial calibrated to 2%. Output 160 mW (10 volts) into 600 ohm load, 20 volts open circuit. Distorsion less
HP 200CD Wide Range Oscillator | Evil Science Audio
https://evilscienceaudio.com/repairs-restorations/hp-200cd-wide-range-oscillator/
The famous Hewlett-Packard 200CD Wide Range Oscillator, in for repair. This one belongs to a local speaker shop, and that fact had a lot to do with the problems found. Lets have a couple more looks inside: Here you can see the power transformer, 6AU6 …
HP 200CD Audio Generator (1955) - antique radio
https://antiqueradio.org/HP200CDAudioGenerator.htm
the Hewlett-Packard 200CD is a "wide range oscillator" that generates a sine wave in the subsonic, audio, and ultrasonic frequencies (5 Hz to 600 KHz). I bought my HP 200CD for one task: aligning the second IF (intermediate frequency) section of my Hallicrafters SX-88 communications receiver.
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