As EricQ mentioned in last night's elog, the modifications were made to the Yend (SN 17) uPDH board.
R31 became 49.9 Ohms, R30 became 45.3kOhm, R24 became 1.02k, R16 became 1k, a new flying resistor is tombstoned up against R24 and connected by purple wire to C6 and it is 20k. C28 is 183nF and C6 is 100nF. These numbers were used in Q's simulation last night.
 
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