They have only been on about an hour and so far looking damn good. ![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
![](https://imagizer.imageshack.com/v2/xq90/924/ub2T8N.jpg)
Very nice!
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
3456A also tend to be very stable calibration wise.
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)
Welcome to your next little step t'wards voltnuttery.
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
A good reason to extend your collection of reference voltage sources and precision (reference) resistors..
But..
pros:
No backup battery that could leak.
cons:
3456As reset at power up.
But who would power a 3456A down anyway?
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)