Hewlett-Packard HP Model 200 AB Audio Oscillator, audio generator, 1952

예전에 스피커 캐비넷 제작시 사용했던 AUDIO OSCILLATOR다 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 Model 200AB and its sister instrument, the Model 200CD, were introduced at the same time in 1952. These new oscillators represented a substantial increase in versatility over previous ones. For example, the frequency range of the 200AB (20 cps to 40 kc) was such that it replaced two of the older HP oscillators, Models ..........

원문링크 : Hewlett-Packard HP Model 200 AB Audio Oscillator, audio generator, 1952