Hotcake devotee here, resurrecting an old thread and paging Bajaman and Soulsonic! I'm having hard time wrapping my mind around the buffer/bypass operation - I'm building the 2003 schematic but using something like the 1977 bypass/buffer setup. In the 2003 schem above with relay bypass (and Soulsoni...

Thanks all for the incredible insight and info! Apologies if this has been covered already but all my searches have turned up conflicting info... Has it been confirmed beyond all doubt that the zendrive used mosfet body diode clipping and not true mosfet gate clipping with blocking diodes? I'm curio...

If you remove the diode the single remaining mosfet clips in one direction as a silicone diode (.6v), in the other as a mosfet, more like 1.8v. A good assymetric clip. Very nice sound. Which is probably what you get with the "fixed" version, since when you have two "clippers" in...

Thanks everyone for the great observations and info! Fellow Joyo UD Fan and novice modder here trying to understand the concepts here. I have a UD bought in August 2015 that appears to have the exact same board and "incorrect" diode orientation as discussed here. After a little research, i...