Group, The subject elicited a fine hardware discussion, as always.
There was some casual talk about measuring fractions of microvolts, implying 10E-7 or -8 accuracy. There are lots of possible thermoelectric effects that may be in series with the source. Without describing how it's done, what is the lower measuring limit in nanovolts? That's the limit where the last digit moves randomly by more than one increment. Does the method involve cryogenics? I'd look it up, but I expect some of you are more current with the science than anything I could find with Google. Given that extreme accuracy and stability are expensive, what can an amateur do for less than, say, $500 or 400 Euros? Thanks for any enlightenment. Bill Hawkins _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.