Possible replacement analogs from different manufacturers

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BF223[Riz] - NPN Silicon	BF 240...241, BF 254...255, BF 494...495	135MHz
BF223[AEG] - NPN Silicon	BF 199, BF 224, BF 311, BF 373, BF 597	750MHz
BF223[AEG] - NPN Silicon	BF 199, BF 224, BF 311, BF 373, BF 597	750MHz