This circuit is from a 1969 Electronics World. It generates 100 kHz sinusoidal signals determined by the crystal. Capacitors must be ceramic.
This circuit supplies a voltage of 42 V, plus a symmetrical voltage of 12 V with 1 A. The voltage...
The operational ones used in this project are old types from National Semiconductor, since the...
This circuit is from a 1973 documentation, using germanium transistors common at the time. The...