The use of field effect transistors in this circuit improves its performance. This configuration is from a 1975 circuit manual. The transistor can be any general-purpose FET such as MPF102 or BF245.
This circuit is from an American documentation from the 90s. The transistors are of power and must be...
This transistor circuit was only found in documentation from the 1960s. The original transistor is made of...
This circuit was taken from an article in Electronics Now magazine in February 1995. The power...