I had the modified version of the DAC-2000 of Bakun Products maintained by the manufacturer, and I also had the modifications confirmed.
It was supposed to work with an external clock, but I had it work even if I didn't have it. Of course, it can also be used through an external clock or capacitor.
Replaced with a Degawa-type power supply, added a bias stabilization circuit, eddy current prevention, etc.
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