Alex,
I can help you and others with these matters but not until later in the year.? ?Most of my inventory for the 3468/3478 is back in Colorado and I have moved to Minnesota.? I will be making it back to Colorado for the parts but not until later in the year? -? possibly fall.
PS? contrary to much of the discussion I have read in these threads, the cal constant backup battery (3V) is not marginal when measuring 3.02v when loaded and drawning current in the 3468. The original lithium batteries are MARKED 3.0V and generally around 3.2v new and I would not begin to get concerned until the voltage drops to 2.7 - 2.8v? when measured loaded in the 3468A.? Many of the batteries are? SAFT? Lithium 3.0? ? p/n? ? LX 1634? ( these are the? "black ones used in later units ).? ?I do? not remember the batteries that were shipped when the instrument was introduced other than they were "white" with black printing -? maybe Panasonic.
?
George
