15 years ago, during my study as an EE, I was taught that, good filtering aft of the bridge rectifier, could be accomplished by using a 100uf cap, a resistor, or better yet an inductor, and then a 20uf cap.
That was following the 5x rules.(back then).I have always built my psu's with that train of thought.
Yesterday, I took apart a relatively new psu, two years old, and was amazed to find that it has a 100uf cap(electrolytic), inductor, and a 10uf(electrolytic) secondary cap.
Is'nt this a little over kill??
The PSU, came out of a motion control board???
Am I mistaken here?
Maybe I should go back in my books and check, I guess.
If anybody knows why such an increase in differential, please let me know.