HP 82143A / HP 82162A foto coupler (encoder) - substitute

[AndiGer]

Thank you very much for explaining. So I will try to get a substitute.
The linked to transistor is NPN. That's the version needed as posted by jebem.
Thus only the right reflecting distance is important.
After measuring and building in I will report.
Hope it will work and with common efforts will also help others
Andi