I'm aware that in some situations TO92 transistors marked C556 mean BC556 (not 2SC556), can the same be for BF...? I have a board with dozens of BF422, HV transistors on. These agree with the schematic but someone has previously replaced 2 with a pair marked F422 and one of them has failed B-C-E short. Diode testing (Vb-c < Vb-e) the remaining one shows correct pinout for BF422
- posted
13 years ago