[sdiy] 2n3904 transistor matching stats

Mike Beauchamp list at mikebeauchamp.com
Wed Jun 8 01:05:51 CEST 2016


Today I went old-school and hand matched a bunch of NPN transistors and 
thought I'd share the stats.

These are bog-standard 2N3906's from Digikey, tested with the standard 
moog test schematic and read with a Fluke.

#  - V measured

1  - .562
~
1  - .567
~
1  - .587
~
1  - .590
1  - .591
1  - .592
~
3  - .595
13 - .596
71 - .597
34 - .498
13 - .599
16 - .600


Seems like out of 156 transistors, almost half match up within 1mV and 
most are within 5mV. But it seems like some are definitely outliers.

Mike





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