Micro/CPU 100

About the Micro/CPU 100

The Sherwood Micro/CPU 100 is a digitally synthesized FM stereo tuner introduced in 1977. It combines a digital frequency readout and alphanumeric station identification display with an analog-style flywheel tuning control. Its microprocessor-based design provides station-memory and tuning functions, with four station presets. The tuner uses a six-gang-equivalent varactor front end and offers selectable IF bandwidths for balancing selectivity and distortion, mono/stereo operation, an automatic stereo noise filter, and selectable de-emphasis. Published specifications include 1.7 µV FM sensitivity, 72 dB stereo signal-to-noise ratio, 0.15% distortion, 80 dB selectivity, a 20 Hz–15 kHz frequency response, dimensions of 508 × 162 × 379 mm, and a weight of 15.4 kg.