Here are the BX-3 and CX-3 theory of operation pages. Thanks to Thomas (Richy) Richardon for these items.
Page 1 - Tone Circuit
Page 2 - Tone Circuit (part 2) and Harping Matrix
Page 3 - Filter Circuitry and Key-Click Circuit
Page 4 - Percussion Circuit and Rotary Effect Circuit
SM305A I - Harping Matrix for Footing Group 3
SM305A II - Harping Matrix for Footing Group 1
SM305B - Harping Matrix for Footing Group 4
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This site was last updated 04/25/11