I tested a working 2sb891 in another machine and its hfe was in the 200s. I still don't really understand how this transistor works either 🤷🏻♂️ I'm guessing someone fried it with over voltage? The first filter cap it's connected to was bulged too
Sorry for the stupid question. I would like to stay with the same TO126 package. The power supply is about 15vDC and the regulator should be putting out about 12vDC. would this be a suitable replacement? I'm a little unsure which specs are most relevant here