The Class-A Amplifier Site

This page was last updated on 17August 2003

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Classic Class-B Schematics


Though these schematics are not for Class-A amplifiers, I thought they might be useful for anyone intending to modify or repair these classic commercial designs.




NAD 3020





Power Amplifier


Power Amplifier  (Single channel at a higher resolution)


Power Supply


Cyrus 1



Input Switching & Volume Control


Phono Stage


Power Amplifier


Power Supply


Sugden A48-II





Parts List



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HISTORY:   Page created 21/10/2001

21/10/2001 Cyrus 1 & NAD3020 schematics added

08/11/2001 Sugden A48-II Schematic added

17/08/2003 Format changed to access gif files directly