This small regulated power supply was found in a 1963 General Electric documentation. The special zener diode transistor can be replaced with an equivalent discrete configuration.
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...