Found in a 1968 American documentation, this circuit uses an operational amplifier that is uncommon today. The feed must be symmetrical. The gain is 40 dB.
This resistive load circuit for source testing was found in a 1991 publication. Power transistors must be...
No information is given about the transformers in this circuit suggested by Motorola in a 1968...
This circuit was obtained from the February 1990 issue of Radio Electronics magazine. The circuit...