Innovation Gallery

Model 200AB audio oscillator, 1952


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 200A and 200B, which were discontinued. This was accomplished without an increase in price.


The 200AB was used for amplifier testing, as a bridge voltage source, for testing transmitter modulator response, modulating signal generators, syncing pulse generators, making loudspeaker resonance tests and powering mechanical systems.

Model 200AB audio oscillator.

The Model 200AB introduced advances in electrical and industrial design, all without an increase in price.