[time-nuts] Any clock disturbances during the July 11 solareclipse?
EWKehren at aol.com
EWKehren at aol.com
Tue Jul 13 12:41:45 UTC 2010
Ulrich,
thank you for the info. I think that 2 E-10 per dayis the best argument
for any Rubidium.
Bert
In a message dated 7/13/2010 8:05:25 A.M. Eastern Daylight Time,
df6jb at ulrich-bangert.de writes:
Bert,
lacking a 3805 manual my guess is that the 3805 EFC scale may be considered
the same as the 3801's one. Which would lead to the conclusion that 1 EFC
unit equals roughly 1.0E-12 of relative frequency change of the LO.
Symmetricon seems to have believed that the MTI 260 type double oven OCXOs
in the Z3805 are superiour to the 10811 double oven OCXOs used in the
Z3801.
However, even after months of being in action, their drift is still very
high. If the above assumption is right what you see in the graph in general
is a drift of 2.0E-10 per day. I do not notice any diurnal changes on the
EFC due to day/night temperature variations which are otherwise the biggest
environmental impact on oscillator frequency variations. So, despite of the
drift the MTI 260 seem to be very "predictable" beasts which leads to
holdover uncertainities that are mostly way below 1 microsecond for a 24 h
interval.
Best regards
Ulrich
> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von EWKehren at aol.com
> Gesendet: Dienstag, 13. Juli 2010 12:21
> An: time-nuts at febo.com
> Betreff: Re: [time-nuts] Any clock disturbances during the
> July 11 solareclipse?
>
>
> Ulrich
> not having a 3805 can you please explain the scale.
> Thank you
> Bert Kehren
>
>
> In a message dated 7/13/2010 6:12:47 A.M. Eastern Daylight Time,
> df6jb at ulrich-bangert.de writes:
>
> Antonio,
>
> attached is a recording of my Z3805's EFC along July 11.
> Times are in UTC.
>
> Best regards
> Ulrich
>
> > -----Ursprungliche Nachricht-----
> > Von: time-nuts-bounces at febo.com
> > [mailto:time-nuts-bounces at febo.com] Im Auftrag von iovane at inwind.it
> > Gesendet: Montag, 12. Juli 2010 22:19
> > An: time-nuts at febo.com
> > Betreff: [time-nuts] Any clock disturbances during the July
> > 11 solar eclipse?
> >
> >
> >
> > Hi all,
> >
> > did anybody out there observe any disturbances in his clocks
> > during (and/or
> > before or after) the July 11 solar eclipse?
> > (due to other duties I've been prevented from doing any tests)
> >
> > Thanks,
> > Antonio I8IOV
> >
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