Hi all , ive been following this thread with interest.
Wouldnt it be beneficial to fill the sealed box containing the precision resistor with oil and heat it with a temperature controller?
Heating it to a temp above ambient would surely help the temperature stability.
Heating could be easily done with a large wirewould bolted to the sealed metal box and controlled with a PID digital controller that are now available cheaply.
Just my thoughts.
Regards Pete
