| Notes | The Moog 901-B Oscillator was the initial VCO designed with a unijunction transistor ramp generator. The 901-B Oscillator is controlled by the 901-A Oscillator controller which provides +12V for the ramp core circuit, control voltage, and the pulse reference voltage. Module cabling is wired in parallel so that a single 901-A can control up to three 901-B modules. The very left range position is for LFO operation.
The 901-B Oscillator is a 1 MU wide module. The original tracking resistor has been replaced with the red tracking trimmer. You can see the parallel capacitor combinations to pad the range switch settings. |
