This circuit with junction field effect transistors was found in documentation from the 1980s. The transistors can be MPF102 or BF245 and details of the coils are not given in the original.
The coil consists of 100 turns of wire 28 in a wooden or PVC tube from 2 cm to 2.5 cm in diameter with...
The circuit shown in the figure can drive a motor (or other type of load) for a time interval that...
This circuit is from a 1966 Motorola Field Effect Transistors Manual. The circuit makes use of...