exagonal wrote:Yes, I just got confirmation ... I run comparison measurements between the 1583 and this fake 2291 getting the same results .. in case I can inform you not to buy these items on E-bay from "hkutsource"
This doesn't have to be malice on the seller's part; he might have picked up a batch from someone else without knowing. This has happened in the past.
Just a quick comparison for measurements:
2SC2291 is ECBCE
2SC1583 is BCECB
(both are NPN). So, using the typical transistor check/HFE measurement built into most multimeters one can check both single transistors.