This 2-tube amplifier was found in a Japanese publication of 1964. The circuit has excellent sound quality. The power supply is not given and must provide a voltage of 300 V.
This circuit uses components that are still common despite being from 1995 documentation. The circuit can...
Found in an old American documentation, this circuit uses neon lamps as a reference to obtain a...
This pulse width-tuned circuit was found in the March 1996 issue of Electronics Now magazine. The...