i replaced the inductor with 180r. i have 26vac in and measure 16vdc on the entrance to the dac board.not sure in voltage should be higher or not, but with the dac board not connected, the voltage reads more in the 21vdc range.
i maybe have a little less gain, but no reason to care. with the sd card reader on pause, and the amp on ful volume, there is no hum. the soundstage is back, in force. the tone, everything is in place, even my complaints about in phase, out of phase, are much more minor. not sure why that is, but i will take it!
anyway, for now, i am back to listening.