[time-nuts] EFC divider resistors

[Bob Stewart]

I put a divider network in the EFC line of my GPSDO to restrict the OCXO range to 2Hz.  Now I'm seeing heat-related drift that wasn't apparent before.  I put a 20K resistor from the same strip on my 3456A, and the warmth of holding it between fingers moves it by about 50 ohms.  What type of resistors should I put in there?  Or am I chasing a problem that doesn't exist?  Totally out of my league here.

Bob - AE6RV