UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Need help with antique replacement volume control.

PJL · 28th Oct 2020, 8:57 pm

The tap in the volume control injects some of the output signal at the speaker to provide negative feedback to reduce distortion. The tap is used so that the feedback is variable so that at high volumes the gain of the output stage is not compromised. Pretty clever for a pre-war set.

28th Oct 2020, 8:57 pm	#8
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Need help with antique replacement volume control. The tap in the volume control injects some of the output signal at the speaker to provide negative feedback to reduce distortion. The tap is used so that the feedback is variable so that at high volumes the gain of the output stage is not compromised. Pretty clever for a pre-war set.