UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Building a little practical audio amplifier for experimentation

Paul JD · 18th May 2019, 11:17 pm

The feedback is going to the cathode of the input stage so it needs to be in phase with the signal on the grid in order to produce negative feedback.

18th May 2019, 11:17 pm	#25
Paul JD Pentode Join Date: Oct 2018 Location: Coventry, West Midlands, UK. Posts: 220	Re: Building a little practical audio amplifier for experimentation The feedback is going to the cathode of the input stage so it needs to be in phase with the signal on the grid in order to produce negative feedback.