I always start by obtaining the manufacturer's Datasheet for the transistor.
NEC 2SC2785 Datasheet : NPN Silicon Epitaxial Planar Transistor for Switching and AF amplifier applications.http://www.classiccmp.org/rtellason/...ta/2sc2785.pdf
Based on the NEC Datasheet, their are 6 different h
-- DC Current Gain ranges.
The transistor is subdivided into four groups, O, Y, G and L, according to its DC current gain.http://www.bluecolour.net/script/pro...1240426773.pdf