S
The drifter
Hmmm what can one say about the 921B is that it drifts a lot, it's not as stable as the 921 VC Oscillator. But it does sound very good. The 921B requires the 921A, but you don't have to use the Oscillator driver, just plug your cv in to the 921AB frequency input and play the oscillator that way.
Stability of the oscillator can be helped a little by applying thermal paste between the tempco resistor and the 3046 chip. I find that after a warmpup tracking and pitch remains a bit more stable with less retuning required.
Hopefully Behringer will revise this oscillator to improve tracking/tuning stability, as they have done now with the System 100 112 VCO.
Stability of the oscillator can be helped a little by applying thermal paste between the tempco resistor and the 3046 chip. I find that after a warmpup tracking and pitch remains a bit more stable with less retuning required.
Hopefully Behringer will revise this oscillator to improve tracking/tuning stability, as they have done now with the System 100 112 VCO.
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