I beta-tested a bunch of 2SC2291's since it seems like their time on this earth is very close to the end.
These were all tested with Ice = 1mA and Vce = ~10V. It's not a precision setup but it is consistent.
Transistor "name" | Datecode | Beta 1 | Beta 2 | Matching |
---|---|---|---|---|
NTE44 #1 | None (sanded off) | 513 | 500 | 1.03 |
NTE44 #2 | None (sanded off) | 520 | 528 | 0.98 |
NTE44 #3 | None (sanded off) | 365 | 373 | 0.98 |
NTE44 #4 | None (sanded off) | 493 | 496 | 0.99 |
NTE44 #5 | None (sanded off) | 445 | 463 | 0.96 |
NTE44 #6 | None (sanded off) | 476 | 483 | 0.99 |
2sc2291 NEC #1 | 66G | 495 | 495 | 1 |
2sc2291 NEC #2 | 66G | 482 | 483 | 1 |
2sc2291 NEC #3 | 66G | 453 | 461 | 0.98 |
2sc2291 NEC #4 | 66G | 545 | 551 | 0.99 |
2sc2291 NEC #5 | 66G | 510 | 522 | 0.98 |
2sc2291 NEC #6 | 05F (whitespot) | 289 | 289 | 1 |
2sc2291 NEC #7 | 05F (whitespot) | 288 | 288 | 1 |
2sc2291 HKSS #1 | 76G | 504 | 504 | 1 |
2sc2291 HKSS #2 | 76G | 600 | 604 | 0.99 |
2sc2291 HKSS #3 | 76G | 566 | 566 | 1 |
2sc2291 HKSS #4 | 76G | 531 | 531 | 1 |