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> Distortion analyzer, hewlett-packard model 331-a
Distortion analyzer, hewlett-packard model 331-a
HEWLETT-PACKARD Model 331-A Distortion Analyzer is a solid state instrument for measuring Audio distortion and AC Voltages. Distortion levels of 0.1% to 100% full scale for any fundamental frequency, from 5 Hertz to 600 KHZ. An output is provided ,at the output connectors, for monitoring the distortion with an oscilloscope (not included). The Voltmeter contained in the Model 331-A can be used for general measurements of voltages and gain. This instrument is used, but in good working condition, checked.
