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.
We found this circuit for vocal effects in the September 1990 issue of Radio Electronics magazine. The...
The original design of this circuit is from a 1978 publication. The circuit can be implemented with a...
We find this circuit in a 1980s documentation. The integrated circuit used is unusual today. The...