We found this good amplifier in a Japanese publication of 1966. Transformers are uncommon nowadays and the power supply is included. Power is a few watts.
Only incandescent lamp can be used in this circuit. The SCR must be mounted on a heatsink and...
This circuit converts an AC signal into a voltage of the same peak value with precision and is...
I found this simple circuit an English magazine from 1984. The circuit can be easily assembled by simply...