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ELEX K2 (Hohner Stringvox) (r3) K2-1 Voicing Board: Drawing designed c.1975 ELEX S.p.A. (Excelsior) drawn 2024 electropict C7 + + C8 R14 R15 R16 R14 R15 R16 The board is drawn from components side, semi-transparent to show the There are twenty versions of the board each with varying resistor and circuit side.
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ELEX K2 (Hohner Stringvox) (r3) K2-2 ‘Matrix’ Board: Schematic designed c.1975 ELEX S.p.A. (Excelsior) drawn 2024 electropict bass range treble range b a61 solder teminals for wires to K2-3 ⓐ 1 1 ⓐ piano sustain (off = grounded) 0R56 +1 5...
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K2 Divider Pitch Outputs Dividers Pins Dividers are numbered left to right. Only output pins are shown. Outputs are shown as IPN pitches. B 0 and E 1 are not used. This table does not include the top octave F#6–F7 which is produced by the TOG chip on OS-5.
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ELEX K2 (Hohner Stringvox) (r3) K2-20-2 Modulation Board: Drawing design c.1975–79 ELEX S.p.A. (Excelsior) | drawn 2024 electropict C8 C9 C10 C8 C9 C10 audio audio modulation Shown from components side transparent to solder side. The K2-20-2 takes an input audio signal and delays it using the TCA350Z BBD chip, by amounts controlled by the incoming modulation signal from the M174 Oscillator board.