[time-nuts] Loran, GPS, Lightning, Timing

paul swed paulswedb at gmail.com
Tue Jun 24 15:42:29 EDT 2014


Oh man does this bring back memories of 12au7s and loop antennas pre
internet 1970 as I recall. A QST magazine article. I built it and it used a
crt for readout.
There wasn't really a way back then to share the data.
But will say this is quite a nice setup.
Regards
Paul
WB8TSL


On Tue, Jun 24, 2014 at 3:35 PM, Tom Van Baak <tvb at leapsecond.com> wrote:

> > I am seriously considering involved as I am a bit of a weather nut too.
>
> I suspect this is quite common. You don't have to get into precise time
> very deep before you realize that all your timing gear is just pile of
> environmental sensors in disguise. Before time-nuts began, the first timing
> guy I met was Doug Hogarth (www.niceties.com) and he was seriously into
> weather measurement. He later got into the world of ultra-precise weight
> (mass) measurement. So I guess time-nuts is just a subset of measurement
> nuts.
>
> A quartz oscillator makes a good thermometer and sometimes a hygrometer
> and barometer too. An OCXO is a sensitive anemometer (just ask anyone who
> uses a PWM fan for TBolt temperature control). Quartz also makes an
> excellent accelerometer, gravimeter, tiltmeter, or even seismometer. An
> OCXO with EFC is a good voltmeter. Atomic clocks are superb magnetometers.
> And as Einstein predicted, atomic clocks make good altimeters and
> speedometers too.
>
> So everything we play with is a sensor. It's no wonder we are preoccupied
> with environmental sensing. Maybe Time is just what's left over after you
> shield or attenuate or compensate for everything else.
>
> /tvb
>
> See also:
>
> Quartz Resonators vs Their Environment: Time Base or Sensor?
> http://dev.quartzdyne.com/pdfs/quartzresonators.pdf
> http://www.paroscientific.com/
>
>
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