This is the circuit of a modified Heathkit kit. The circuit was found in a Radio Electronics from December 1965. The author of the circuit included improvements to the original circuit.
This small commercial radio for the MW band with germanium transistors was found in Japanese...
This circuit is from 1992 documentation. The transistor can be a TIP42 with a good heat sink for...
This speaker overload protection circuit was found in Radio Electronics from the 1980s. The...