[time-nuts] Question on crystal jumps
brooke at pacific.net
Wed Oct 22 23:39:34 UTC 2008
A possible explanation is cosmic rays. The actual particle that gets to the
surface of the Earth is so energetic that it would take a very thick lead
shield to stop them. The Earth has enough mass that they can not go all the
way through. http://en.wikipedia.org/wiki/Muon
So a test would be to stack a few crystals very close together (it's just plain
geometry) and monitor their frequency to look for coincident jumps.
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Ron Smith wrote:
> Hello Antonio,
> A.W.Ladner and C.R.Stoner in their book "Short Wave Wireless Communication"
> describe a phenomenon called "stepping", which may be the same effect as the
> jumps you are
> The book is quite old, 4th edition published in 1942 by Chapman and Hall,
> and refers (on page 321) to stepping in X- and Y-cut crystals, which may not
> be common these days, but perhaps crystals of all cuts are affected to some
> The text says the curve of frequency against plate thickness does not give a
> straight line, but has discontinuities in it. These discontinuities they
> call "stepping points" and are a result of edge vibrations coinciding with
> sub-multiple frequencies of the wanted thickness vibration mode. The degree
> of coupling between the wanted and unwanted modes varies with crystal
> dimension. If there is zero coupling, the stepping points should not affect
> the main oscillation. But perhaps even the smallest change in dimension can
> cause it to cross one of these discontinuities and jump to and fro? I
> suspect that crystal sensitivity to stepping or jumping may be correlated
> with its temperature coefficient, although there are other factors
> (including gravitational) that influence frequency of oscillation at very
> small levels.
> Antonio, these frequency jumps are not a phenomenon I have come across
> myself, so I have nothing to log,
> but I am interested in what you discover. Wouldn't it be fascinating if you
> discovered a global trigger to many simultaneous frequency steps?
> The book reference is a bit old I'm afraid - things have moved on since
> Good luck.
> Ron Smith
> ----- Original Message -----
> From: <iovane at inwind.it>
> To: "time-nuts" <time-nuts at febo.com>
> Sent: Wednesday, October 22, 2008 11:06 PM
> Subject: Re: [time-nuts] Question on crystal jumps
>> Hi Rick
>>> I'm not quite sure what the question is here....
>> The question is:
>> may anybody tell me (date and time) when a crystal jumped?
>> (a sample response could be: my crystal jumped on January 22, 2006 12:25
>> I would like to map in time as many jumps as possible.
>> I hope someone in the list has a log of his jumps.
>> Thanks and 73,
>> Antonio I8IOV
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