03-23-2025, 12:26 PM
Paul,
Each stage of a radio inverts the signal 180 degrees from grid to plate and the signal at the cathode is in phase (but, quite often the cathode is at ground potential). So negative feedback can be used just about anywhere in the audio amplifier as long as the source is out of phase with the destination and is typically 2 or 3 stages. The effect is a slight reduction in volume and greatly reduces distortion. Just turn up the volume control a notch.
Each stage of a radio inverts the signal 180 degrees from grid to plate and the signal at the cathode is in phase (but, quite often the cathode is at ground potential). So negative feedback can be used just about anywhere in the audio amplifier as long as the source is out of phase with the destination and is typically 2 or 3 stages. The effect is a slight reduction in volume and greatly reduces distortion. Just turn up the volume control a notch.