[time-nuts] 10811 crystal orientation

[Don Latham]

Agreed. Has anyone done the crucial experiment? establish stats, rotate
assembly, establish stats, etc? Should be able to measure at least if
there is an effect, and also if it is present, an approximate magnitude...
Don

Rob Kimberley
> Jim,
>
> It is very much on topic!
>
> Rob Kimberley
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Jim Palfreyman
> Sent: 08 July 2009 23:37
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] 10811 crystal orientation
>
> 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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-- 
Dr. Don Latham AJ7LL
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