Hello everyone. So recently I've been interested in learning more about inductive coupling. A wireless power circuit I'm trying to build calls for a transistor (BD139 in particular). I am salvaging the parts I need for this project as for I am not able to order or go buy parts atm. My main question is, is there a replacement for the BD139 that would meet the same parameters as this transistor? Providing surface mount equivalent would be better but full size is fine also.
maybe I'm being lazy but in my mind asking is the most logical choice. I read and learn, often I have to break my concentration on my study material so I can go study a related subject before I can continue what I was studying. I have a decent understanding of how transistors work.
thanks in advance