12 Volt Electric Motor Brush | Products & Suppliers | …
2020. 9. 5.· Con- sequently, by turning on the electric motor drive at any time during the test, a dynamic signal of the de- sired frequency and known amplitude was injected into the dynamic recording equipment for calibration purposes. The dynamic bridge was powered by a 12 - volt direct-current source, and the bridge output fed into a brush amplifier and, in turn, to a brush crystal direct- inking ...
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