This circuit is from an old American publication, using transistors of the time and operating with a 48 V power source. The load is 2.2 ohm, and the transistors must be replaced by modern equivalents.
This circuit was found in a General Electric / RCA documentation from the 1980s. The circuit is...
We found this 4-transistor receiver for the AM MW range in a 1960 transistor manual from Sylvania....
This fast converter using operational was found in a 70s American documentation. The circuit can be...