[time-nuts] Reeeely long term HP 5065A drift rate (13 year!)
jim77742 at gmail.com
Mon Jun 29 23:47:37 UTC 2015
Did you take into account difference in height (if it was significantly
On 30 June 2015 at 03:46, <cdelect at juno.com> wrote:
> I recently had a unit come in for repair that I had sold 13 years ago.
> The owner never did ANY adjustments on the unit.
> After the repair (which would not have affected the frequency) and before
> aligning the unit I decided to check and see how far it had drifted in
> the 13 years.
> Did a run against an HP 5071A and the frequency offset is 2.1X10-11th
> best case and 4.1X10-11th worst case.
> This gives an average of 1.65X10-12th to 3.15X10-12 per year!
> Pretty amazing!
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