Using the integrated circuit 723 we found this power supply in an article in the magazine Radio Electronics from August 1971. The transistor may be a BD136 equipped with a heat sink.
This circuit was obtained from an English documentation based on a 74121 TTL integrated circuit....
This circuit generates signals with opposite phases determined by C1 and adjusted by R2. The...
The presented circuit uses two old germanium transistors. We found this configuration in a...