In fact, this 1967 Electronic Design circuit generates two symmetrical ramps whose frequency depends on the values of the components used. Modern equivalent transistors can be used.
Found in an Electronics World of 1968, this circuit is indicated for applications in photography...
This circuit can generate signals from 100 kHz to 50 MHz depending on the crystal and the...
This unregulated low voltage source was found in the July 1962 Radio Electronics magazine....