[time-nuts] Any guesses as to how Citizen is claiming ±1 second/year with using this AT-cut 8.4MHz XTAL?

Hal Murray hmurray at megapathdsl.net
Wed Apr 11 18:41:57 EDT 2018


kb8tq at n1k.org said:
> Before you say it can’t be done, the whole “average out” thing is how time
> pieces have been done for hundreds of years. The device may swing this  way
> and that …. done properly it eventually averages out. How well it works for
> you … that depends.  

There is a wonderful message in the archives someplace that describes how to 
adjust a watch.  The recipe is roughly:
  Adjust watch to run correctly in the shop.
  Give it to customer.  Tell him to come back after a week of normal use.
  Measure offset.
  Adjust watch to compensate for that offset.

That probably doesn't work very well if your watch spends the night on the 
stand and your room temperature changes a lot from summer to winter.


-- 
These are my opinions.  I hate spam.






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