Suggested by Mullard in an old documentation, this circuit is based on a common phototransistor and on transistors that may be the modern BC548.
This circuit is from a Popular Electronics from the 80's. The components used are not common...
This high voltage source for gas LASER was found in documentation from the 1990s. The circuit is...
Suggested by Mullard in an old documentation, this circuit is based on a common phototransistor and on...