Greetings everyone. Sorry for my English.
the final transistors of my M2 burned out by mistake (2sa1051+2sc2461). I tried to replace them but the new ones burned out immediately so they turned out to be fake.
I'm trying to replace them with sanken 2sa1386 2sc3519. This happens: I adjust the quiescent current to 10 mV on 0.47 ohm therefore to 21.3 mA but it is unstable, it tends to increase. they burned out the first time, now I have to continually adjust to keep it in range. Are the Sanken fake? Idle current with the original 2sa1051+2sc2461 corresponds to 50 55 mV across 0.47 Ohm CT and PE terminals on the schematic. By fitting the original 2sa1051+2sc2461of the other channel , everything works perfectly.
Thanks for your help
the final transistors of my M2 burned out by mistake (2sa1051+2sc2461). I tried to replace them but the new ones burned out immediately so they turned out to be fake.
I'm trying to replace them with sanken 2sa1386 2sc3519. This happens: I adjust the quiescent current to 10 mV on 0.47 ohm therefore to 21.3 mA but it is unstable, it tends to increase. they burned out the first time, now I have to continually adjust to keep it in range. Are the Sanken fake? Idle current with the original 2sa1051+2sc2461 corresponds to 50 55 mV across 0.47 Ohm CT and PE terminals on the schematic. By fitting the original 2sa1051+2sc2461of the other channel , everything works perfectly.
Thanks for your help