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  |