The components of this circuit are still common today. The circuit is from a 1967 publication by General Electric.
This circuit is from an old American publication. The indicated transistor is oversized as the 15 V...
This power source can supply currents in the range of 100 mA to 1 A, depending on the transformer and the...
This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an...