Hi PX builders,
I would like to get your input, what do you think about my measures taken on a Keithley 7 1/2 digit, 100 averages:
Max: 07.065917 V
Min: 07.065843 V
For me it does not look very stable ![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
eurofox
Hi eurofox,
I have found that my LTZ's have been more sensitive to EMI / waving my hand near the circuit, etc, than my LM399 circuits.
The most quiet results I have obtained so far were:
- With the LTZ board inside of an aluminum Hammond 1590B enclosure
- Measuring the difference between one LTZ and another
- With both LTZ's powered by independent batteries / regulators
I have other boards on-hand (a clone of Dr. Frank's board, and a KX board), but I have not assembled them yet (still characterizing resistors and I'd like to measure the 1/f noise of my LTZ's before soldering them in). When I get those other boards assembled, I'll be able to compare the EMI / hand-waving sensitivity of the different board designs.