Maybe you missed this earlier piece of info:-
http://www.google.com/hostednews/ap/article/ALeqM5giHrMC9wYlOzOkUg9wNC2jVKugkw?docId=371623ab59694aef9f0a02fe83faca8a
john k.
----- Original Message -----
From: "Instrument Resources of America" <[email protected]>
The mains "frequency", at least here in the U.S. is always being
corrected for small variances that occur in the frequency during the
day. Therefore the overall error is none over a years time. Clocks are
therefore always accurate and never need resetting, unless of course
there is a power failure, or when changing fron standard time to day
light saving time, and vice versa. Ira
On 6/25/2011 11:01 AM, jb-electronics wrote:
Personally, I do not understand what the benefit is of using the mains
frequency. I always use a 4.194304MHz Quarz and so far all my clocks'
accuracies are very satisfactory.
...clip....
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