JFET
This configuration, quite common in this section, was found in a 90s American documentation. The JFET can be of any type of general use.
This circuit was found in 80's Popular Electronics. The circuit uses an infrared-sensitive phototransistor...
The circuit shown can drive loads from 500 mA to 2 A, depending on the transistor with the TTL or...
This 6-transistor commercial radio was manufactured in Japan in the 1960s, intended to receive...