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.
Launched in April 2017 by Texas Instruments, the TLV62568 is a high-efficiency synchronized Buck...
Found in a 1968 documentation, this small amplifier was very popular at the time being used in...
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...