Office will then consider all prior art received when deciding
to grant or to deny a patent.
Joe Gwinn
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and the dew point is never reached inside the box.
Joe Gwinn
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At 3:24 PM + 2/24/12, time-nuts-requ...@febo.com wrote:
Date: Fri, 24 Feb 2012 14:42:36 +0100
From: b...@lysator.liu.se
To: "Discussion of precise time and frequency measurement"
Subject: Re: [time-nuts] Neutrinos not so fast? (defective connector)
Bj?rn,
[snip]
>>
High precis
difficult
to cut without a hot wire knife.
Balsa wood cuts very easily with a sharp knife, glues very well with
carpenters' glue, and will not degrade over time.
Joe Gwinn
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place
urethane foams available from building supply houses.
Joe Gwinn
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chnicalinfo/applications/27.asp>
Joe Gwinn
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ulator.
Joe Gwinn
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all that, versus just running an amplified fiber between CERN
and Gran Sasso? Two links are likely to be twice the trouble and
error.
Joe Gwinn
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e been for lack of trying. Now the
world physics community is on the case, so it may not take all that
long.
Joe Gwinn
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and
y the operating system.
If there is no drift file, the usual symptom is that the clock offset
grows without bound almost linearly.
If there is a valid drift file, the usual symptom is that the clock
offset sways more or less sinusoidally, this being the residue after
the average clock dr
uffice to act as a short at
1.5 GHz. A thin sheet of mylar (or a heavy anodization layer)
between would help this along, by increasing the capacitance.
Joe Gwinn
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ttachment-0001.jpg>
The aluminum fin and copper pipe assembly integrated with the
heatsink plate is most likely a heat pipe of some kind, as that's
what Thermacore makes. It's a model 2644, from the nameplate, but no
joy at the Thermacore.com website.
Joe Gwinn
___
t work. It was pretty good, especially considering that the
heatsink system is wholly passive and electronics-free.
Joe
Bob
On Jan 23, 2010, at 1:33 PM, Joe Gwinn wrote:
> Back in December 2009 I proposed (in "Re: [time-nuts] Cheap
Rubidium (heatpipe cooling for)") use of
http://ntrs.nasa.gov/search.jsp?R=190521&id=9&as=false&or=false&qs=Ns%3DPublicationYear%257c0%26N%3D4294915469>
Copper-water-nitrogen VCHPs seem simple enough for fabrication in a
home shop, although long-term retention of nitrogen (or any such gas)
will require hard braz
Fri, Dec 25, 2009 at 4:38 PM, Joe Gwinn wrote:
At 12:45 AM + 12/25/09, time-nuts-requ...@febo.com wrote:
Date: Thu, 24 Dec 2009 17:14:38 -0700
From: Robert Darlington
Subject: Re: [time-nuts] Cheap Rubidium (heatpipe cooling for)
To: Discussion of precise time and frequency
hat a recirculating water loop is a more practical approach to
carry away the heat. It's got a pump to move the water, but the rest of it
> is fairly simple.
Bob
On Dec 24, 2009, at 2:49 PM, Joe Gwinn wrote:
> A dodge occurs to me - a homebrew heat pipe: <
http://en.wikipedia
-stage ovening
scheme.
Joe Gwinn
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At 10:06 PM + 12/23/09, time-nuts-requ...@febo.com wrote:
Date: Thu, 24 Dec 2009 09:46:13 +1300
From: Bruce Griffiths
Subject: Re: [time-nuts] Cheap Rubidium
To: Discussion of precise time and frequency measurement
Joe Gwinn wrote:
Date: Thu, 24 Dec 2009 08:57:42 +1300
From
y controlling
the speed of the fan (or pump) driving air (or oil) through the heat
sink, as has been suggested.
Joe Gwinn
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and
org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Joe Gwinn wrote:
At 1:44 AM + 12/13/09, time-nuts-requ...@febo.com wrote:
Date: Sat, 12 Dec 2009 17:29:17 -0800
From: Colby Gutierrez-Kraybill
Subject: [time-nuts] 60Hz mains clocking in computers
To: time-nuts@fe
the screen.
Joe Gwinn
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ll matched pairs of
such ADCs.
Joe Gwinn
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measurement
Joe Gwinn wrote:
Magnus,
At 4:01 PM + 7/25/09, time-nuts-requ...@febo.com wrote:
Message: 5
Date: Sat, 25 Jul 2009 16:38:23 +0200
From: Magnus Danielson
Subject: Re: [time-nuts] Measuring phase shift between 1 Hz DMTD
signals by I+Q processing
To: Discussion of
measurement
Joe Gwinn wrote:
It occurs to me that there is a possible alternative to the ZCD-chain
approach typical in DMTDs, if one is willing to provide two mixers and
two ADCs per channel, with a 90 degree phase offset between LO signals
provided to the mixers of a channel. The output of
the math to estimate performance compared
to the traditional ZCD approach, but the complex multiply and average
approach should be quite robust against noise, and is easily
implemented in a DSP or FPGA.
Joe Gwinn
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less than US $10. Here's one:
<http://www.dadsrockshop.com/blades.html>
The traditional approach is to hold the oddly shaped object to be cut
in pitch. By lapidary standards, ferrites are pretty soft, and so
should cut quite quickly.
Joe Gwinn
Does anybody know of any PCI cards that will receive IRIG-B time
signals and come with an I/O driver for AIX (IBM's flavor of UNIX)?
Industrial-grade commercial products are preferred.
Thanks,
Joe Gwinn
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Magnus,
At 6:02 PM + 1/10/09, time-nuts-requ...@febo.com wrote:
>
>Message: 4
>Date: Sat, 10 Jan 2009 19:02:09 +0100
>From: Magnus Danielson
>Subject: Re: [time-nuts] Standards sought for immunity of shielded
> cable links to power-frequency ground loops
>To: Discussion of precise time
Magnus,
At 10:31 AM + 1/10/09, time-nuts-requ...@febo.com wrote:
>
>Message: 5
>Date: Sat, 10 Jan 2009 11:06:39 +0100
>From: Magnus Danielson
>Subject: Re: [time-nuts] Standards sought for immunity of shielded
> cable links to power-frequency ground loops
>To: Discussion of precise ti
At 4:59 AM + 1/7/09, time-nuts-requ...@febo.com wrote:
>
>Message: 6
>Date: Tue, 06 Jan 2009 21:54:41 -0600
>From: Brian Kirby
>Subject: Re: [time-nuts] Standards sought for immunity of shielded
> cable links to power-frequency ground loops
>To: Discussion of precise time and frequency m
Magnus,
At 12:00 PM + 1/2/09, time-nuts-requ...@febo.com wrote:
>Message: 1
>Date: Fri, 02 Jan 2009 09:45:23 +0100
>From: Magnus Danielson
>Subject: Re: [time-nuts] Leap seconds and POSIX
>To: Discussion of precise time and frequency measurement
>
>
>>> : In practice, in platforms tha
ssage-ID: <495dd1ef.7030...@rubidium.dyndns.org>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>Joe Gwinn skrev:
>> Having worked in the POSIX committee for many years, I can shed some
>> light on how POSIX handles leap seconds:
>>
>> In short, PO
Steve,
At 8:39 AM + 1/2/09, time-nuts-requ...@febo.com wrote:
>
>Message: 6
>Date: Fri, 2 Jan 2009 14:00:56 +1300
>From: "Steve Rooke"
>Subject: Re: [time-nuts] Leap seconds and POSIX
>To: "Discussion of precise time and frequency measurement"
>
-ID: <20090101.112803.179959520@bsdimp.com>
>Content-Type: Text/Plain; charset=us-ascii
>
>In message:
> Joe Gwinn writes:
>: Having worked in the POSIX committee for many years, I can shed some
>: light on how POSIX handles leap seconds:
>:
>: In short, POSIX a
Having worked in the POSIX committee for many years, I can shed some
light on how POSIX handles leap seconds:
In short, POSIX adamantly ignores leap seconds. All days in POSIX
have the same length, 86,400 seconds.
This omission is not by accident, instead having been violently
debated at leng
Pete,
At 4:58 AM + 12/27/08, time-nuts-requ...@febo.com wrote:
>
>Message: 2
>Date: Fri, 26 Dec 2008 19:10:47 -0700
>From: "Pete"
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: "Discussion of precise time and frequency measurement"
>
>
>Joe,
>
>I have been following this t
Bruce,
At 10:16 PM + 12/23/08, time-nuts-requ...@febo.com wrote:
>
>Message: 1
>Date: Wed, 24 Dec 2008 08:47:21 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
>[snip]
> >
> Us
At 5:05 PM + 12/23/08, time-nuts-requ...@febo.com wrote:
>Date: Tue, 23 Dec 2008 11:40:51 -0500
>From: John Ackermann N8UR
>Subject: [time-nuts] New topics (was Re: He is a Time-Nut
> Troublemaker)
>To: Discussion of precise time and frequency measurement
>
>
>Magnus Danielson
At 5:05 PM + 12/23/08, time-nuts-requ...@febo.com wrote:
>Date: Tue, 23 Dec 2008 16:10:29 +
>From: Mark Sims
>Subject: [time-nuts] Sub Pico Second Phase logger
>To:
>Message-ID:
>Content-Type: text/plain; charset="Windows-1252"
>
>
>Since when has prior art or obviousness kept the US Pat
Bruce,
At 11:43 PM + 12/22/08, time-nuts-requ...@febo.com wrote:
>
>Date: Tue, 23 Dec 2008 12:01:40 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
>[snip]
> >> [BG] Control of the close
Bruce,
At 9:08 PM + 12/22/08, time-nuts-requ...@febo.com wrote:
>
>Date: Tue, 23 Dec 2008 10:08:35 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
>Joe
>Joe
At 2:01 AM + 12/22/08, time-nuts-requ...@febo.com wrote:
>
>Message: 4
>Date: Mon, 22 Dec 2008 11:19:06 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
>Joe
>
Ulrich,
At 7:57 AM + 12/22/08, time-nuts-requ...@febo.com wrote:
>
>Message: 7
>Date: Mon, 22 Dec 2008 08:56:55 +0100
>From: "Ulrich Bangert"
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: "'Discussion of precise time and frequency measurement'"
>
>
>Joe and Bruce,
>
>> U
Bruce,
At 9:50 PM + 12/19/08, time-nuts-requ...@febo.com wrote:
>
>Message: 8
>Date: Sat, 20 Dec 2008 10:50:46 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
Bruce,
At 9:50 PM + 12/19/08, time-nuts-requ...@febo.com wrote:
>
>Message: 7
>Date: Sat, 20 Dec 2008 10:38:26 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
Bruce,
At 3:54 AM + 12/19/08, time-nuts-requ...@febo.com wrote:
>
>Message: 6
>Date: Fri, 19 Dec 2008 16:54:12 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
&g
Bruce,
At 3:54 AM + 12/19/08, time-nuts-requ...@febo.com wrote:
>
>Message: 5
>Date: Fri, 19 Dec 2008 16:51:55 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>
At 11:48 PM + 12/18/08, time-nuts-requ...@febo.com wrote:
>
>Message: 5
>Date: Fri, 19 Dec 2008 12:48:27 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency measurement
>
>Message-ID: <494ae14b.2050...@xtra.co
This is from home. I'll not be at work until next year.
At 11:48 PM + 12/18/08, time-nuts-requ...@febo.com wrote:
>Message: 4
>Date: Fri, 19 Dec 2008 12:17:33 +1300
>From: Bruce Griffiths
>Subject: Re: [time-nuts] Sub Pico Second Phase logger
>To: Discussion of precise time and frequency mea
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