.........................................the Normal is to indicate correct mirroring for PCB etching................
| The Modular Workshop |
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.........................................the Normal is to indicate correct mirroring for PCB etching................ |
WHAT IS BEING BUILT
My version of the Moog 901
- All VCO circuit is discrete and parts are exactly as the original.
- My design has provisions for using a matched PNP pair for the unijunction driver circuit.
- Off board supply will connect to +/- 15 volt regulators and power original +12/-6/-10 supply voltages
- Added separate calibrated keyboard and octave switching trimmers
- Moved all temperature sensitive components to central location for thermal coupling - originally this circuitry was spread over 2 boards, and replace one component in voltage adder circuit with tempco.
- Added additional summer from moog CP3 panel to add CV voltages for Pulse Width and Pulse Width Modulation
Internal Busses and Connections
1 - Keyboard CV
The builder
David Leith - davidleith.com
Adobe Illustrator file of circuit layout and parts overlay (still has on board regulators which should be distanced from VCO)- lastest version but may still have errors: download file
A Photo of the original Moog 901
