Hello, All--
In doing some reading to educate myself on the relative
short and long-term stability characteristics of the best
grade quartz resonators, I find that BVA cut resonators
are on the leading edge of quartz crystal technology.
I have found out how a BVA resonator is fabricated, but
I
Michael Baker wrote:
I have found out how a BVA resonator is fabricated, but
I have not discovered what the acronym BVA stands for.
I suspect that the B in BVA may refer to Raymond Besson
the discoverer of the BVA quartz resonator, but I
have not been able to confirm that.
Can anyone on
A googlized translation is:
Improved Housing for Aging
-Chuck Harris
John Franke wrote:
Try:
Boîtier à Vieillissement Amélioré
John WA4WDL
- Original Message -
From: John Ackermann N8UR [EMAIL PROTECTED]
To: Discussion of precise time and frequency measurement
Same for me with both browsers.
Daun
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Didier Juges
Sent: Friday, December 07, 2007 9:02 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Super stable BVA Quartz
Coincidentally, I just learned today that the
E1983A is still being made by an OEM called
Scotts Valley Magnetics.
Rick Karlquist N6RK
Magnus Danielson wrote:
Is the E1938 commercially available? If not, is there a followup?
Cheers,
Magnus
The 10811's specs are not in the same class with the
BVA in the first place. At the 10811 spec level,
frequency jumps aren't that significant compared to
other frequency fluctuations, so they don't need to
be specified separately. Phase noise and short term
stability are easily distinguished
Didier Juges wrote:
Maybe the cut is simply a smoke screen and the outstanding performance
is actually due to other process detail(s) not disclosed?
There's quite a bit of guff on the Oscilloquartz website - especially
if you find your way to the OXCO 8607-B datasheet (pdf).
I'm not
From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] Super stable BVA Quartz resonators... BVA??
Date: Fri, 7 Dec 2007 17:17:59 -0600
Message-ID: [EMAIL PROTECTED]
I am not aware of other crystal oscillators with better performance, so
either I am missing something (the more likely
Hi fellow time-nuts!
I am just happy to let you know that I am now proud owner of a Wavecrest
DTS-2070C. I also have a SIA-3000P from before, which is nice for jitter but
not as versatile as you would wish at all times. I think the DTS will be a nice
complement.
I was not suspect it to be that
Try:
Boîtier à Vieillissement Amélioré
John WA4WDL
- Original Message -
From: John Ackermann N8UR [EMAIL PROTECTED]
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Friday, December 07, 2007 11:20 AM
Subject: Re: [time-nuts] Super stable BVA Quartz
Boîtier à Vieillissement Amélioré
This is another version,
Enrico
Enrico Rubiola
professor of electronics
web:http://rubiola.org
e-mail: [EMAIL PROTECTED]
FEMTO-ST Institute
32 av. de l'Observatoire
25044 Besancon, FRANCE
voice: +33(0)381.853940 (E.Rubiola)
voice: +33(0)381.853999
I am not aware of other crystal oscillators with better performance, so
either I am missing something (the more likely explanation) or there is
something to it.
Maybe the cut is simply a smoke screen and the outstanding performance is
actually due to other process detail(s) not disclosed?
Or
From: Richard (Rick) Karlquist [EMAIL PROTECTED]
Subject: Re: [time-nuts] Super stable BVA Quartz resonators... BVA??
Date: Fri, 07 Dec 2007 17:28:15 -0800
Message-ID: [EMAIL PROTECTED]
Rick,
Coincidentally, I just learned today that the
E1983A is still being made by an OEM called
Scotts
I looked at the HP 10811 specification and I do not see Frequency Jumps as a
specified parameter.
I know what it is, I have read the (very interesting) papers and postings on
this group about it and I understand it is one of the more difficult to
avoid and hardest to predict cause of error in
Brian Styles said the following on 12/07/2007 07:15 PM:
There's quite a bit of guff on the Oscilloquartz website - especially
if you find your way to the OXCO 8607-B datasheet (pdf).
[ . . . ]
They've made over 10,000 of them. Anyone know what they're charging...?
Very rough numbers, but
Martyn,
designing a Cs standard is not the job for a single man,
yet I might help you to find frustrated scientists who worked
on a Cs project (some 10 years ago I took a part in a project,
designing damn impossible precision electronics).
About the noise of your quartz oscillator, not bad.
Yet:
Having low aging is nice, but the real problem is
frequency jumps. Do we know that they are the best
in that respect? If a crystal can jump 1E-10, then
that represents 10 days of aging all at once.
Rick Karlquist, N6RK
Didier Juges wrote:
I am not aware of other crystal oscillators with
Reminds me of the SC cut crystal.
It either means Stress Compensated or Santa Clara,
where it was discovered :-)
The BVA has been around for a long time and you
would think that if there was really something to
it, everybody would be making them. Of course, they
are very difficult to make.
Rick
John Ackermann N8UR wrote:
The option -008, ... is about $14K. I'm told the yield
of those is about a dozen per year, and the lead time to get one is
around six months.
Hmm, not quite long enough to save up, then!
Changing the subject slightly, does anyone know the Thomson-CSF
PMT P5-1E ?
Same thing here, I checked with Firefox and IE, and the problem clearly is
at their end... Maybe Monday?
Didier
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Magnus Danielson
Sent: Friday, December 07, 2007 7:56 PM
To: time-nuts@febo.com; [EMAIL
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