• Country
• United States of America (USA)

• Manufacturer / Brand
• Hewlett-Packard, (HP); Palo Alto, CA

• Year
• 1950

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 219828

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes
• 6J7 6F6 6J7 6V6 5Y3GT

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Audio Oscillator 202D - Hewlett-Packard, HP; Palo Alto

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 17 x 8.75 x 11.12 inch / 432 x 222 x 282 mm

• Notes

• The Model 202D Audio Oscillator is a general purpose oscillator which uses the resistance-tuned circuit to generate alternating current voltages from 2 to 70,000 cycles/sec. This audio oscillator provides a source of voltage for amplifier testing, audio response of transmitters, loud speaker resonance tests, and a voltage source for bridge measurements. It is particularly useful where low frequencies are involved, as in mechanical vibration problems.
  
  Frequency Range: 2 - 70,000 cycles/sec
  Frequency Dial Calibration X range 2 - 20, A range 7 Kc - 70 Kc
  Range
  xl 2 - 20 cycles/sec
  x10 20 - 200 cycles/sec
  x100 200 - 2000 cycles/sec
  x1000 2000 - 20,000 cycles/sec
  A 7000 - 70,000 cycles/sec
  Calibration Accuracy: ±2%
  Frequency Response: ±1 db 2 to 70,000 cycles/sec. Reference: 1000 cycles/sec, 10 volts across 1000 ohms resistive load. Frequency Stability ±2% under normal temperature conditions, including initial warm-up. ±10 volt line variations change frequency less than ± 0.2% at 1000 cycles/sec
  Power Output: 100 milliwatts into rated load (10 volts across 1000 ohms resistive load)
  Distortion: Less than 1% of rated output from 2 to 70,000 cycles/sec
  Hum: Less than 1% of rated output
  Load Impedance: 1000 ohms (resistive)
  Approximate Internal Impedance: 25 ohms from 50 to 70,000 cycles/sec

  see Forum

  .

   

• Net weight (2.2 lb = 1 kg)
• 25 lb 0 oz (25 lb) / 11.350 kg

• Source of data
• -- Schematic

• Author
• Model page created by Pius Steiner. See "Data change" for further contributors.

• Other Models

• Here you find 391 models, 359 with images and 138 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hewlett-Packard, (HP); Palo Alto, CA