2N 1539 thru 2N1548 (continued) BASE CURRENT versus EMITTER BASE VOLTAGE 10 0 II 0 YCE = - 2 Y ! o . . .. 70 ..IE III 60 :::> ! 50 ~ 40 0 20 10 o II II 2N1539-2N1543 - I 17 II II 2N1544-2N1548 I 1'-~ // // ./". ", o 0.1 0.2 0.3 0.4 0.5 0.6 V'" EMITIER-BASE VOLTAGE (VOLTS) DC CURRENT GAIN versus COLLECTOR CURRENT 240 YeI.=-I 2Y 200 z 160 ~ 5 II 120 :::> 80 - , / 2N1544-2Nl548 '- r- ~ ~ 2N1539-2N1543 I / 40 ~ o rI I o 4 Ie. COLLECTOR CURRENT (AMP) 2N 1549, Athru 2.