Found in a Philips publication from the 1970s, this circuit uses a DO040, which is difficult to obtain today. The circuit is powered by 12 V on pins indicated in the diagram.
This circuit provides a 60 Hz or 50 Hz precision clock or time base, depending on the network. It serves...
With the values of the indicated components, this oscillator produces a sinusoidal signal of 1...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...