A little off at a tangent, but I was checking out/repairing my 2005A these last couple of weeks. I of course blew the fuse testing the current limit pot, so it had to come apart and get cleaned. My pot has a little 'catch' at about 900 ohms. I couldn't see any reason for it. The resistance will jitter a little on the meter if the pot is set at this point. I'll probably have to live with this. I did give it a dose of DeoxIT FaderLube before putting it back together.
FWIW, here is an hour or so of data with it set to 10V. You can clearly see the oven heater cycling, but the effect is less than 50uV pk-pk. (The 34461A's trend plot labeling leaves a little to be desired to say the least; they have room for another digit, but insist on displaying 10.000 2 twice...)