[time-nuts] 10811 crystal orientation

Jim Palfreyman jim77742 at gmail.com
Thu Jul 9 00:07:58 UTC 2009


Bill,

I thought my "new age pseudo-science" comment would have been enough to make
people understand it was humour.

Apologies for leaving the :-) off the bottom of the email!

Jim

2009/7/9 WB6BNQ <wb6bnq at cox.net>

> Jim,
>
> I totally disagree !  The "crystal orientations" thread has been most
> informative, particularly with regard to the link showing the internals of
> the hp
> oscillator.  A short section of the "plumbing" was helpful, although it got
> a bit
> out of hand.
>
> I think the point of the "Timenuts" list is to provide a medium for
> discussion of
> topics that help people improve their efforts at achieving higher precision
> in
> all facets of time keeping.  All of the list members are not on the same
> level
> whether it is education, technical or even monetary ability.  Thus, many
> are here
> for learning and to prevent poor choices and expensive mistakes from others
> that
> have gone before them.
>
> If you want to complain about something, then jump on Bruce for never
> suggesting
> what "transistor/opamp/comparator" part number would be most appropriate
> for his
> circuits.  I go "nuts" time and time again over that small point because I
> do not
> have enough in-depth knowledge to fully make the appropriate choices.
>  Hmmmm,
> maybe that is why it is called "Timenuts" list ? A place for Bruce to drive
> you
> "nuts" time and time again.
>
> Who would have thought ?
>
> Bill....WB6BNQ
>
>
> The point being that
>
> Jim Palfreyman wrote:
>
> > All,
> >
> > Can you please follow John's instructions and stay on topic.
> >
> > All this new age pseudo-science talk of "crystal orientations" and "g
> > sensitivity" does not belong in this group.
> >
> > Thank you.
> >
> > Jim
> >
> > 2009/7/9 Robert Atkinson <robert8rpi at yahoo.co.uk>
> >
> > >
> > > Hi Antonio,
> > > Have a look at http://www.realhamradio.com/GPS-oven-journey.htm for
> > > internal pictures.
> > > The crystal element is a disc mounted parallel to the flat end of the
> can,
> > > see http://www.bliley.com/index_088.htm
> > >
> > > Robert G8RPI.
> > >
> > > --- On Wed, 8/7/09, iovane at inwind.it <iovane at inwind.it> wrote:
> > >
> > > > From: iovane at inwind.it <iovane at inwind.it>
> > > > Subject: Re: [time-nuts] 10811 crystal orientation
> > > > To: "time-nuts" <time-nuts at febo.com>
> > > > Date: Wednesday, 8 July, 2009, 7:01 PM
> > > > Hi Chad,
> > > >
> > > > the sketch you sent seems to indirectly answer my question,
> > > > as I could rely on the axis of minimum "g" sensitivity to
> > > > orient my three 10811 assemblies, but for my purpose it
> > > > seems that there is still a margin of ambiguity. I don't
> > > > take from the sketch how the crystal is actually fitted
> > > > (vertically?) into the case. As far as I know, "g"
> > > > sensitivity depends mainly on how the crystal "weights" on
> > > > its suspensions (contacts), and this is secondary for me.
> > > > So, I would be pleased to know how the crystal is actually
> > > > oriented, say regardless of the "g" sensitivity.
> > > >
> > > > Thanks.
> > > > Antonio I8IOV
> > > >
> > > > > Hi Antonio,
> > > > >
> > > > > Please see the attached diagram from the 10811A
> > > > service manual.  Minimum and
> > > > > maximum G-sensitivity axes are shown.  Since the
> > > > other variants of 10811 are
> > > > > all internally constructed the same, I would not
> > > > expect a difference for the
> > > > > -60111.
> > > > >
> > > > > - Chad.
> > > > >
> > > > >
> > > > >
> > > > > On Wed, Jul 8, 2009 at 10:27 AM, iovane at inwind.it
> > > > <iovane at inwind.it>
> > > > wrote:
> > > > >
> > > > > > Dear all,
> > > > > >
> > > > > > does anybody out there know the orientation of
> > > > the crystal faces relative
> > > > > > to the outer case in a 10811-60111?
> > > > > >
> > > > > > (The sense of the question is that we are
> > > > considering building a 3-axis
> > > > > > apparatus for gravity-related tests. Note, based
> > > > on our tentative
> > > > > > modelization, crystals are not requested to work
> > > > as accelerometers).
> > > > > >
> > > > > > Antonio I8IOV
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> > >
> > >
> > >
> > >
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