Thank you very much Andreas for the info.
Fabio Eboli.
Andreas Jahn <[email protected]> ha scritto:
Hello Fabio,
since National does not longer produce the LM399, LT is the only
manufacturer where you can get them.
In a german forum they state that the SL40057 IC-527 is used at
least in a keithley 2000 (6,5 Digit).
From my collected information of DMMs I know the following:
Keithley 2000, 2001 and 2010 use the LM399
Keithley 2002 uses the LTZ1000A
with best regards
Andreas
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