![Chanzon 10pcs TIP42C TO-220 Power PNP Darlington Transistor -6A: Amazon.com: Industrial & Scientific Chanzon 10pcs TIP42C TO-220 Power PNP Darlington Transistor -6A: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61kQxyWa1GL._AC_UF1000,1000_QL80_.jpg)
Chanzon 10pcs TIP42C TO-220 Power PNP Darlington Transistor -6A: Amazon.com: Industrial & Scientific
![Semiconductor: AC127K (AC 127K) - TRANSISTOR GERMANIUM NPN / NF-TR/E / 32V / 0.5A / 0.34W... - US$ Site Semiconductor: AC127K (AC 127K) - TRANSISTOR GERMANIUM NPN / NF-TR/E / 32V / 0.5A / 0.34W... - US$ Site](https://m.electronic-spare-parts.com/pics/a/ac_127k.jpg)
Semiconductor: AC127K (AC 127K) - TRANSISTOR GERMANIUM NPN / NF-TR/E / 32V / 0.5A / 0.34W... - US$ Site
How does a transistor amplify an AC signal (when it works on DC and cannot change current direction)? - Quora
What is the difference between using a bipolar junction transistor (BJT) for direct current (DC) versus using one for alternating current (AC)? - Quora
![capacitor - Adding a DC bias to an AC voltage at the base of a transistor - Electrical Engineering Stack Exchange capacitor - Adding a DC bias to an AC voltage at the base of a transistor - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/8SIHU.png)
capacitor - Adding a DC bias to an AC voltage at the base of a transistor - Electrical Engineering Stack Exchange
![Semiconductor: AC127K (AC 127K) - TRANSISTOR GERMANIUM NPN / NF-TR/E / 32V / 0.5A / 0.34W... - US$ Site Semiconductor: AC127K (AC 127K) - TRANSISTOR GERMANIUM NPN / NF-TR/E / 32V / 0.5A / 0.34W... - US$ Site](https://m.electronic-spare-parts.com/pics/a/ac_127k-2.jpg)