This stabilized source can supply currents up to 700 mA and the output voltage is close to 15 V. a little less with the load. The power transistor must have a good heat radiator.
This 700 Hz centered high selectivity circuit was found in the 1980s Magazine Magazine for Amateur...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
We found this circuit with SCRs and unijunction in a Radio Electronics magazine from June 1969. The...