Dave reviewed the Krohn-Hite DC Voltage precision power supply he bought. After checking if it was working within specs, he proceeded to open it up and see what it was made of.
There were a few surprises inside, like the resistor voltage dividers were in the standard Kelvin topology, instead of the more precise Kelvin-Varley topology. He was also shocked that the device doesn’t use a temperature controlled voltage reference. Even with these drawbacks the instrument still manages to work within spec.
Via the forum.