ciao, it seems to me that BC818-40LT1G is currently the only available part that could be used as T1. can someone confirm that this would fit?
Ciao Martin, for which board do you mean? Multi MIDI Thru? If so, sure a BC817 or 818 will do just fine, basically any NPN transistor with the same pinout. Actually here it does nothing more than drive the power LED, so could even be left out 🙂.