We found this circuit in a Japanese publication in 1967. The circuit consists of a 15 W audio amplifier with germanium transistors including a voltage indicator power supply.
The components of this circuit are still common today. The circuit is from a 1967 publication by...
This analog TV circuit can be used on a small transmitter. The circuit is from an 80's American...
We found this circuit in a 1976 documentation. The FET can be BF245 or MPF102 and the power supply...