This circuit tunes MW radios to apply the signal to a good audio amplifier. The circuit is from an old documentation. Transistors are general purpose types.
This “test your nerves” game was found in old documentation. The SCR can be of any sensitive type,...
The power supply for this circuit must be symmetrical at 15 + 15 V and the load at 4 or 8 ohms. The...
The LM109, which is not common today, was manufactured by many semiconductor companies. This...