- Joined Jan 17, 2008
Greetings AAC'rs: I have an audio preamplifier that turns out needing a very quiet power supply in order for it to perform as quiet as I would like. Attached is the bipolar power supply for it. When I had added a second set of filter caps to the power supply, the noise drops about 17 db improving the preamplifier performance significantly. My problem is, using my scope, I can't see the ripple on the output of the regulators either way. Any suggestions on measuring minute amounts of ripple on the output of the regulators? Any help appreciated.
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