[sdiy] A Frequency Standard for Poor People?

James Patchell patchell at cox.net
Tue Dec 16 04:41:01 CET 2003


I don't think you would notice.  2/100 of a Hz at 60Hz is 0.5 cents.  This 
will cause the scales to be shifted up or down across the keyboard by 1/2 
of a cent.  If I can tune my VCO's that well, I am happy.  And my 105 year 
old piano drifts around by +/- 5 cents on a week to week basis, so 
musically speaking, this is insignificant.


At 10:30 PM 12/15/2003 -0500, WeAreAs1 at aol.com wrote:

>In a message dated 12/15/03 7:10:51 PM, jlarryh at iquest.net writes:
>
><< Interestingly enough, it is indeed great over the average.  In on an hourly
>
>basis, synchronous time (clock on 60Hz) is compared to atomic time and a
>
>"time error" is declared.  As long as this is within +/- 4 seconds, nothing
>
>is done.  Once outside those boundaries, a "time correction" is ordered and
>
>utilities purposely add or subtract generation to the system to hold
>
>frequency 2/100 Hz high or low until synchronous time is once again correct.
>
>Each utility contributes compared to their percentage of the whole. >>
>
>How does this effect guys who are playing Hammond tonewheel organs?
>
>Michael Bacich

         -Jim
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