Re: [time-nuts] any way to bootstrap a frequency standard into a voltage or resistance standard? Brian Kirby said, in part,
"You will also find, that maintaining voltage references are a little more difficult then time/frequency - we all have GPS or LORAN to verify our time standards, etc. You either have to have the equipment to monitor the voltage references, or send them out for calibration. I prefer to leave standards/references where they are for stability reasons, and send the test equipment out for regular calibration. You have the same environmental problems, you name a stable temperature environment to operate them in." Seems to me that all physical quantities have to be calibrated against standards, because they're all defined by humans, starting with the length of the king's arm. Timenuts have the great advantage of being able to do calibration with radio waves. Don't think you can do that with any of the other physical properties, and perhaps time is not a physical property. Temperature does affect everything made of atoms. PV=NRT and all that. Timenuts strive for constant temperature inside small ovens. Industrial sensors, which have to operate over a wide range of temperature daily and seasonally, now rely on microprocessors with local temperature sensors for temperature compensation. Some interesting designs have been used to compensate the length of time-keeping pendulum oscillators. Has any work been done on temperature compensation of quartz or other oscillators to avoid the expense, space, and power of ovens? The oscillating material must have a repeatable temperature curve, of course. 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.
