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opamp K153UD5 - datasheet [solved] - uA725, now what to build?
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RoGeorge:
Very important for cross reference replacements, the key for the metal-can Russian opamps marks pin 1, while for the western opamps the key marks pin 8.

BTW, found something useful to build for the lab (with these opamps):  Power amplifier for the signal generator.  :D
https://www.eevblog.com/forum/projects/precision-opamp-power-stage-to-increase-v-and-i-out/
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