This power supply is based on the 723 integrated circuit, which is no longer very common today. The transistor must have a heatsink and the bridge can be formed by diodes 1N4002 or equivalent.
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...
This circuit trips with negative pulses and the value of C depends on its intensity. C1 determines the...
The integrated circuit is not common nowadays since the configuration was obtained in Motorola's Linear...