Photomultiplier tube trigger (CB8868E)

We found this circuit in a 1970’s Philips documentation. The circuit uses components from that time.

Operational and Transistors Symmetric Power Supply (CB14885E)
With this circuit it is possible to have a symmetrical source from a simple source with voltages from...
Constant light (CB12750E)
The basic idea of the circuit shown in the figure is to increase the brightness of an ordinary...
9 V Transistor Regulator (CB20289E)
This regulator can use BD'136 as the main transistor and as a reference next to a BC548 zener. The...