There have been scores of articles on low noise regulators, harking back to early articles in The Audio Amateur. Some of these use discrete components for the error amplifier, others have used the AD797, AD817 and AD825 from Analog Devices.  I think that the best of these were found in the 2/95, 3/95 and 4/95 issues of "Audio Amateur", the pertinent letters, adn the subsequent follow up article in 2000.  The articles were authored by Walt Jung, Jan Didden and Gary Gallo and include a comprehensive discussion of the design theory, implementation and validation of the approach.  The articles are available on Walt Jung's website --> Regulators.  A copy of the construction article is included if you purchase the printed circuit boards sold by AudioXpress (linked below).

The regulators designed by Jung used the LM329DZ voltage reference -- a low noise and inexpensive TO-92 device.  We found that by paralleling a number of LM329's the reference noise could be reduced.  Feel free to use on or more LM329's in your application.  The schematic below incorporates some of the improvements cited in the 2000 Audio Electronics article (LM317 and LM337 Pre-Regulators, pads for compensation capacitors if necessary) and the circuit boards generally follow the original designs of Jung and the other associated authors, scaled for surface mount devices.

Through-Hole boards for the Jung-Didden Super Regulator are available from Old Colony Sound's--> OCS Webstore.  I have installed the Jung-Didden SR boards in my modded Adcom GFP-565.

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