I am making an audio amplifier using an LM2879. I am using the schematic provided in the data sheet.
For a starting point, this design works pretty well, although the base cutoff point could be a bit lower. When I power this circuit on, I am greeted by quiet, high pitched static regardless of the volume of my device. When I play music, the quality of the music is good. I believe the static is coming from my power adapter because someone else in the reviews for this product said it was electrically noisy. Is there a way to filter out this noise at all? If you have any other ideas of where the static is coming from, I would appreciate the help.