The FETs of this circuit can be the BF245. The circuit is from an old documentation and can be used in the amplification of infrasonic waves, of a sonic attack, for example.
Found in an Electronics Now from the 90s, this circuit appears elsewhere in this section and...
This TTL circuit was found in the February 1973 issue of Radio Electronics magazine. The power...
This circuit was found in an old publication about transistor. The original trasistors are...