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The original source for this was from Bob Schleicher's Electronic Instrument Service website, It is gone, but has been archived on the Wayback Machine. The archive includes the Services and Schematics web page, in which a link to the schematic of the AO28 effects loop can be found.

The content of this page is Copyright (C) 2000, 2001, 2002 Geoffrey T. Dairiki and the other authors of the content, whoever they may be.
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