Brolik
Well-known member
I recently bought a small lot of what are supposed to be Motorola 2N3055 transistors to use in my Nevey projects. As I dug into the info on these pieces I found it very difficult to find any solid info at all, especially anything that helped to decide if they were counterfeit or not. So I figured I would collect together what I had and see if any of you infinitely wise souls can help me to decide what I have.
Some history and counterfeit info for the Motorola 2N3055:
https://groups.google.com/group/aus.electronics/browse_thread/thread/cd8d118ea634f5f/64e020b503c07b4e?lnk=st&q=motorola+on+2N3055&rnum=1&hl=en#64e020b503c07b4e
http://www.diyaudio.com/forums/parts/2848-2n3055-mj21193-mj15004-pics-detecting-counterfeits.html
Some pics of my transistors. 2 different serial numbers, mostly the 7826 with a few 7713:
one from the top of each serial number:
one from the bottom of each serial number (same sides):
an outside and inside shot of 7826:
Any ideas about the legitmacy of these transistors? real of fake?
Some history and counterfeit info for the Motorola 2N3055:
https://groups.google.com/group/aus.electronics/browse_thread/thread/cd8d118ea634f5f/64e020b503c07b4e?lnk=st&q=motorola+on+2N3055&rnum=1&hl=en#64e020b503c07b4e
http://www.diyaudio.com/forums/parts/2848-2n3055-mj21193-mj15004-pics-detecting-counterfeits.html
Some pics of my transistors. 2 different serial numbers, mostly the 7826 with a few 7713:
one from the top of each serial number:
one from the bottom of each serial number (same sides):
an outside and inside shot of 7826:
Any ideas about the legitmacy of these transistors? real of fake?