This amplifier for recording heads was found in a Radio Electronics from September 1963. The circuit uses period transistors but can be modified to work with modern transistors.
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...