[time-nuts] Small basket

Perry Sandeen sandeenpa at yahoo.com
Thu Oct 13 00:55:33 EDT 2011


Wrote: I wonder how long it will be before the only remaining basket of will suffer a catastrophic fall.

The U.S. satellite system, AFAIK, is not guaranteed for high accuracy to civilians and also is vulnerable to foreign interference/destruction.

Perhaps while we have it as it is now, it might be prudent to accurately track the EFC voltage over time that one needs to maintain a particular oscillator to it maximum stability.

Then make an independent oscillator and divider chain that will cycle a digital potentiometer taps or perhaps a DAC to automatically maintain the rate-of - change needed to keep said oscillator at maximum stability.

Doing this now with at least one or two oscillators and then comparing to a GPS derived frequency and least gives one a “belt and suspender” back-up.

High quality 10 MHz oscillators are available all day on epay for less than $50.  Or one could splurge on  a HP 10811 or Rubidium for less than $100.

Just food for thought.



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