This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
This circuit was found in an old Radio Electronics, but can still be assembled as the components are...
The coil L2 has 64 turns of wire 28 or thinner wire in a 1 cm form coreless and L1 10 turns on L2....
This circuit is from an old documentation. Integrated circuit 723 is not common today. The power...