For the sake of testing with correct values, I added a 47K resistor in series with the existing 50K voltage pot, and replaced R13 with 62K, but on the 12mA range without a load the meter needle still jumps to the left as before.
I also kind of recalibrated the 120mA scale with about 70ma by adjusting the voltage control for maximum output (now only about 160V) and connected an external resistance load with a 1.5K in series with a 2.7K (both 10W) and an external DMM on the 500mA scale (I did not have the 3185 ohm resistor called for in the "legal" cal procedure). Then rotated the current pot up CW until the DMM would read exactly 70mA, and then adjusted R56 current calibration control so the meter needle would also read 70mA. Then lowered the current pot down CCW for a 10mA reading on the DMM, switched the meter over to the 12mA scale, but it only read a hair under 5mA. If I then pushed the current up by rotating the current control CW until the meter needle would read 10mA, the external DMM would now indicate 13.1mA.
If I then remove the load, the meter needle would do a slight twitch and after about a second (not immediately) would start swinging towards the left rather slowly and go all the way down past zero. Pretty much same behavior as it was doing before I tinkered to correct the R10 and R13 values.
So looks like something else might still going on here, or am I missing anything? Just replacing R10 and R13 with their more correct values appears will not alone solve the issue with the 12mA meter scale.
