I am working on following circuit involving BC107 NPN Philips TO-92 transistor and voltage source of 4.2 V. <!-- Begin schematic: In order to preserve an editable schematic, please don't edit this section directly. Click the "edit" link below the image in the preview instead. --> ![schematic](https://i.sstatic.net/QP6J8.png) <!-- End schematic --> I got some confusion when measuring collector's current. I was expecting that to be at least 0.2 A but when I insert probes and measure current as shown in the picture I get a reading of 0.0079 A. That would mean an DC Gain (beta/hFE) of Ic/Ib=0.0079/0.0023=~3.37, while this transistor should yield a gain of about 40-200 (I do not have spec for TO-92 though, it's taken from datasheet for BC107 TO-18, can't find any spec for TO-92...). I would like to understand why am I getting 0.0079 reading when the base current (Ib) is 0.00234 A (confirmed with multimeter). Ib = (4.2 - 0.7) / 1480 = 0.0023 Ic (expected) = Ib * hFE = 0.0023 * [40:200] = [0.092:0.460] [A] but real Ic = 0.0079 [A] [![enter image description here][1]][1] [![enter image description here][2]][2] [![enter image description here][3]][3] [1]: https://i.sstatic.net/W5QUL.jpg [2]: https://i.sstatic.net/qAePK.jpg [3]: https://i.sstatic.net/eUbJP.jpg