Hello all,
Just a warning that I was about to use a "2N5401" that is marked as follows:
2N 5401 CH13and on the back, molded in a circle on the rear is K1 or K7 - the ones with the K7 have the lettering slightly rotated.
On these devices, the middle pin is the COLLECTOR not the Base, as a genuine 2N5401 would be. These devices are on a paper tape strip of 20 I bought, and unfortunately I did not keep them in the original package, so I don't recall where they came from.
Just thought I'd mention it here, as it could cause a lot of grief when repairing something. I did not bother to curve trace these to see if they otherwise meet spec, as I plan to trash them. I've since ordered some proper 2N5401's from Digikey.
Regards, and Happy New Year Tim Schwartz Bristol Electronics