Photomultiplier tube trigger (CB8868E)

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

1 kW alternating beacon (CB6261E)
This circuit for incandescent light bulbs was suggested by General Electric in a 1980s...
Colpitts Oscillator (MSB047E)
L1 and C1 determine the frequency of this Colpitts Oscillator. Refer to our section Mathematics...
1 kHz Transistor Oscillator 1 (CB12906E)
This oscillator generates a 1 kHz signal, using an old germanium PNP transistor. The circuit was...