PDF data sheet of 47.6 KB for the 1T411 transistor, filed in the schematic category. Following the Soviet designation scheme, the 1T prefix denotes a germanium transistor, typical of vintage radios, amplifiers and instruments. The sheet gives pin identification, absolute limits and gain data needed to verify a part with a tester or choose an equivalent. The name lists no grade letter, so check the marking on the component and, if the document contains a grade table, use the values for the matching letter.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
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