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  The HP204D Audio Oscillator:  

HP204D Wide Range Audio Oscillator. We accomplish Ni-Cad battery pack removal and power supply network on this equipment.

DESCRIPTION: This is the classic audio oscillator built by Hewlett Packard from the 50's until the '80s. It was, and still is, considered a "the standard" in bench repair technology.


  • Frequency range:  5hz to 1.2mhz in 6 overlapping ranges
  • Dial Accuracy: +/- 3% of setting
  • Output Voltage: 2.5V rms into 600 ohms, 5V rms open circuit
  • Output Impedance: 600 ohms
  • Sync output
  • Variable Output Control 9 Step attenuator
  • Low distortion


  • Frequency Range: 5hz to 1.2mhz in 6 overlapping ranges

  • Dial Accuracy: +/- 3% of frequency setting
  • Output control continuously variable
  • 9 Step attenuator
  • Sine Wave output
  • Sync output
  • 600 ohm output

We completely refurbish these for you, and return a standard state-of-the-art piece of test equipment.

  • Already own this instrument? Send it to us for a complete re-work. Email for pricing to

Refurbished instrument cost is exclusive of packaging (double boxing for all electronics) and shipping costs. We ship worldwide.

store: Visit our eBay store, anytime.


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