At the Heritage Park Museum we are grateful for all of the donations we have received over the years. One such donation is this audio oscillator. The 200A model was the first product by Hewlett Packard and was manufactured in David Packard’s garage in Palo Alto in 1939.
An audio oscillator is an instrument that generates one pure tone or frequency at a time. Through the years, HP oscillators were used to design, produce and maintain telephones, stereos, radios and other audio equipment.
The 200A was the first commercial oscillator to use a simple light bulb as the temperature-dependent resistor in its feedback network.
Walt Disney bought eight of these oscillators for use in the production of Fantasia. (source: Wikipedia)