You are using a B+ of 85 volts for the radio but there is a 150K resistor dropping this voltage to the detector. This resistor may have gone up in value?
Voltages will much less that the 110-120 shown on the schematic. They figured this with 180 volts input. That seems high for a detector.
Would expect more than 16-17 volts but even that would work.
Norm
:Would 16 to 17 volts DC be low for the detector tube (112) on my Crosley 26? B voltage on the output is 85 volts DC.