More great 5440A data. After the unit properly warmed up all night, I disconnect the leads and re ran the self-tests, which also runs an internal calibration. After passing all three tests again, I tracked the 1V output again and its pretty damn sharp. Just 6.5µV pk/pk swing, and the deviation is in the 100's of nV's. Pretty stoked.
edit** note: I may a chance to go get (3) of the 5440b/AF models. I CANNOT KEEP THEM ALL and I think I will only go down and get them if I can arrange to sell a couple first (thats probably a lie, Ill probably get them as soon as I am able, I may even walk there and hand carry them back if I need too
) But if anyone wants in on the ground floor of this deal and has cash to put up for their 5440B/AF then please let me know. This will be a short term offer though so you will have to act pretty quick if you want one at the same price I pay (plus a couple dollars for pickup).Also the 5440B/AF are the VFD display units, not like the dot matrix unit I have here.