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 was found in a Signetics documentation from the 1980s. Next to the figure are the...
We found this circuit in an English magazine from 1980. The circuit can be easily assembled even...
November 2016 - Super capacitors from 1 F to 3 500 F from AVX can now be purchased from Mouser...