I've finally gotten around to implementing the deadband hack as per the moog service bulletin/synthfool hand-drawn schematic on my late osc board Model D. The deadzone works after inserting everything (including the 619K resistor), however the synth is now around 4 semitones flat! I double-checked everything according to the factory bulletin, and everything appears to be in order, and the voltage across the diodes is within specification (0v +/- 0.1v). I tried to re-calibrate it, but the trim pot maxes out before it can achieve pitch, indicating that something is wrong! When I tune the pitchbend pot, the voltage across the diodes reads around 0.4 volts, and the deadzone disappears no longer functional. I was able to remove the mod and the synth now functions normally, however reinstalling it causes the same issues.... Any assistance would be greatly appreciated.
Thanks in advance
Implementing the deadband hack as per the moog service
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