Rex wrote:
> On Sat, 24 Mar 2007 15:39:15 +0100 (CET), [EMAIL PROTECTED] wrote:
>
>> It exists the same way many old cesiums exists. I think Nikon still
>> supports the line with spares and support. No new units produced. Killed
>> in the high end now by UW-housed DSLRs and inte the low end by UW-
On Sat, 24 Mar 2007 15:39:15 +0100 (CET), [EMAIL PROTECTED] wrote:
>It exists the same way many old cesiums exists. I think Nikon still
>supports the line with spares and support. No new units produced. Killed
>in the high end now by UW-housed DSLRs and inte the low end by UW-housed
>compact digit
Your camera probably had a cold solder joint. Maybe it was an RoHS part
soldered with standard soldering process. We have that problem all the
time with vendors sending RoHS parts with the same part number as the
SnPb part they replace. I would not be surprised to see a lot of those
problems i
Subject: Re: [time-nuts] Question for the cesium nuts.
> That reminds me of a tester I got to see while I was working on a
> project for Motorola at one of their ALT (accelerated life test) labs.
> This was for testing durability of cell phones. The tester basically
> was a pendulum th
: "Discussion of precise time and frequency measurement"
>>
>> Sent: Saturday, March 24, 2007 12:29 AM
>> Subject: Re: [time-nuts] Question for the cesium nuts.
>>
>>
>>
>>> My digital camera died recently. (Well, it was killed. I gave it
In message <[EMAIL PROTECTED]>, Neon John writes:
>Any other "grey beard" here ever see HP's calculator promotional show
>that they staged on campuses? The one where the rep hurled Brand T or
>C against the wall and of course, it splattered. Then he hurls an
>HP-35 or -45 the same way and it jus
ch 24, 2007 12:29 AM
> Subject: Re: [time-nuts] Question for the cesium nuts.
>
>
>
>> My digital camera died recently. (Well, it was killed. I gave it a bath
>> in
>> salt water when I miss-judged a wave at the ocean.)
>>
>> I went to the local brick
On Fri, 23 Mar 2007 23:29:43 -0700, Hal Murray
<[EMAIL PROTECTED]> wrote:
>My digital camera died recently. (Well, it was killed. I gave it a bath in
>salt water when I miss-judged a wave at the ocean.)
>
>I went to the local brick and mortar camera store to get a replacement.
>After I told t
Message -
From: "Hal Murray" <[EMAIL PROTECTED]>
To: "Discussion of precise time and frequency measurement"
Sent: Saturday, March 24, 2007 12:29 AM
Subject: Re: [time-nuts] Question for the cesium nuts.
>
> My digital camera died recently. (Well, it was
> That reminds me of a tester I got to see while I was working on a
> project for Motorola at one of their ALT (accelerated life test) labs.
> This was for testing durability of cell phones. The tester basically
> was a pendulum that was about three feet high. At the base, you placed
> the PUT (p
PROTECTED] On
Behalf Of Robert Atkinson
Sent: 19 March 2007 09:10
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
Hi,
I think you would find it surprising what is still restricted. While
searching for data on the FTS/Datron
e and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
Hi Hal:
I got a couple of Austron 2100T Loran-C timing receivers from Government
Liquidation (the private contractor that sells most of the U.S.
Government's surplus stuff). Some time later someone drove h
on of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
> To pass the hammer blow test, the unit has to still function
> electrically after the blow. It is OK if it suffers structural damage
> as long as it still works.
That's an intere
al Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Hal Murray
Sent: 18 March 2007 04:56
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
>> Are there some funny accounting rules screwing things up?
> N
In a message dated 3/18/2007 06:29:32 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Yes, that is the general idea. Also medical equipment must not be used
by the US medical community in the US, hazardous materials must sold only
to companies that are proven capable of safe use and dispo
In a message dated 3/17/2007 07:40:07 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Reminds me of the extra-ordinary light bulb:
http://www.centennialbulb.org/
/tvb
This bulb has burned about 3714 Kilowatthours or so of power so far, or 3.7
Megawattshours!
That's impressive.
bye,
Hi Hal:
I got a couple of Austron 2100T Loran-C timing receivers from Government
Liquidation (the private contractor that sells most of the U.S.
Government's surplus stuff). Some time later someone drove hundreds of
miles and stayed at a local motel so he could come to my place and see
each o
Hal Murray wrote:
>>> Are there some funny accounting rules screwing things up?
>> Not accounting rules as you meant them, but rather end use rules.
>
>> It takes someone with a functioning brain to figure out what the
>> different pieces of equipment are, and to make sure that the end use
>> rest
> To pass the hammer blow test, the unit has to still function
> electrically after the blow. It is OK if it suffers structural damage
> as long as it still works.
That's an interesting corner of the world that I've never worked with.
Is there an official test spec for destroying gear? :(
Some
-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Hal Murray
Sent: Saturday, March 17, 2007 11:56 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
>> Are there some funny accounting rules screwing things up?
>> Are there some funny accounting rules screwing things up?
> Not accounting rules as you meant them, but rather end use rules.
> It takes someone with a functioning brain to figure out what the
> different pieces of equipment are, and to make sure that the end use
> restrictions are honored. I
To pass the hammer blow test, the unit has to still function
electrically after the blow. It is OK if it suffers structural
damage as long as it still works.
Rick Karlquist N6RK
> OK, the DUT is sitting on a big steel table and the hammer hits the
> table not the piece, but still...you would b
Thomas A. Frank wrote:
>>> The test is called the "hammer blow" test.
>>>
>> Why do I picture a large steel hammer on a swing setup with a DUT as
>> targeted
>> endpoint?
>>
>
>
> Because that's pretty much how it's done :-)
>
> OK, the DUT is sitting on a big steel table and the hamme
surement
Subject: Re: [time-nuts] Question for the cesium nuts.
>> The test is called the "hammer blow" test.
>
> Why do I picture a large steel hammer on a swing setup with a DUT as
> targeted
> endpoint?
Because that's pretty much how it's done :-)
OK, the D
>> The test is called the "hammer blow" test.
>
> Why do I picture a large steel hammer on a swing setup with a DUT as
> targeted
> endpoint?
Because that's pretty much how it's done :-)
OK, the DUT is sitting on a big steel table and the hammer hits the
table not the piece, but still...you wo
From: "Rick Karlquist" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Sat, 17 Mar 2007 15:29:38 -0700 (PDT)
Message-ID: <[EMAIL PROTECTED]>
> You're thinking of the 5062 that fits into the hatch of a submarine (a 5061
> won&
You're thinking of the 5062 that fits into the hatch
of a submarine (a 5061 won't). The test is called
the "hammer blow" test.
Rick Karlquist N6RK
Magnus Danielson wrote:
> From: "Rick Karlquist" <[EMAIL PROTECTED]>
> Subject: Re: [time-nuts] Questio
From: "Rick Karlquist" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Sat, 17 Mar 2007 13:48:11 -0700 (PDT)
Message-ID: <[EMAIL PROTECTED]>
Rick,
> That project made it as far as a pilot run of a half dozen
> working prototypes and
That project made it as far as a pilot run of a half dozen
working prototypes and assignment of a model number, but HP never
sold any of them. I still have one of these "valuable"
collector's items :-)
You probably never heard of the HP 5063
cesium either, but that's another story...
Rick Karlqu
From: "Poul-Henning Kamp" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Sat, 17 Mar 2007 17:09:37 +
Message-ID: <[EMAIL PROTECTED]>
>
> Am I the only one who have never heard of the 10816A before ?
A google for "HP 108
Am I the only one who have never heard of the 10816A before ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED] | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
__
I believe the deal on that bulb is that it is being run at
considerably less than its normal voltage, and the life of
a bulb varies as voltage to the Nth power, where N is an
integer around -12 or something. Like those "lifetime"
130V bulbs.
Unfortunately, you can't throttle down a Rb plasma lamp
From: Dr Bruce Griffiths <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Sat, 17 Mar 2007 22:06:40 +1300
Message-ID: <[EMAIL PROTECTED]>
Hal,
To put a few more words on each of them.
> Active masers oscillate.
Active masers will actually genera
> Having worked on the HP 10816A rubidium clock 25 years ago,
> it is hard for my to believe the lamp alone could last 56
> years on the average. Even ordinary light bulbs don't last
> that long.
>
> Rick Karlquist N6RK
Reminds me of the extra-ordinary light bulb:
http://www.centennialbulb.o
Sent: Friday, March 16, 2007 10:12 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
> Well, there is one reason, and that is the US DRMO discovered it is
> cheaper to destroy test equipment than it is to sell it.
Is that
Having worked on the HP 10816A rubidium clock 25 years ago,
it is hard for my to believe the lamp alone could last 56
years on the average. Even ordinary light bulbs don't last
that long.
Rick Karlquist N6RK
[EMAIL PROTECTED] wrote:
>
> In a message dated 3/16/2007 18:32:58 Pacific Daylight Time
> > What do "active" and "passive" mean wrt masers?
> >
> > From the above data sheets, active means bigger and better. (and probably
> > more expensive)
> >
> Hal
>
> Active masers oscillate.
> Passive masers don't.
>
> Bruce
Another way to think about it:
active masers oscillate;
passive m
Hal Murray wrote:
>> http://www.kvarz.com/pdf/05%20CH1-75A.pdf (Active MASER)
>> http://www.kvarz.com/pdf/06%20CH1-76A.pdf (Passive MASER)
>>
>
> What do "active" and "passive" mean wrt masers?
>
> >From the above data sheets, active means bigger and better. (and probably
> more expensive)
>
> http://www.kvarz.com/pdf/05%20CH1-75A.pdf (Active MASER)
> http://www.kvarz.com/pdf/06%20CH1-76A.pdf (Passive MASER)
What do "active" and "passive" mean wrt masers?
>From the above data sheets, active means bigger and better. (and probably
more expensive)
--
These are my opinions, not nece
In a message dated 3/16/2007 20:37:28 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
> Is there anyone in the market for a used FTS-4050 for parts? I would be
> interested to sell the actual Cs reference inside the unit. Want to keep
> the 19" rack mount enclosure though.
I'm interested,
Hal Murray wrote:
>> Well, there is one reason, and that is the US DRMO discovered it is
>> cheaper to destroy test equipment than it is to sell it.
>
> Is that really true? I'd think a reseller would buy stuff by the truckload
> without much hassle and that would avoid carting it to the dump.
>
> I have a used FTS-4050 unit that has a very high Cs current (meter is
> maxed) and generally doesen't seem to lock very well.
>
> Is there anyone in the market for a used FTS-4050 for parts? I would be
> interested to sell the actual Cs reference inside the unit. Want to keep
> the 19" rack mo
In a message dated 3/16/2007 18:32:58 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
Also, some high end rubidium (such as Perkin-Elmer)
manufacturers are able to develope 133Rb clocks having
> 450 000 hours MTBF! That'a a lot of nanoseconds!
Hi Jack,
we cannot expect the units to wo
> Well, there is one reason, and that is the US DRMO discovered it is
> cheaper to destroy test equipment than it is to sell it.
Is that really true? I'd think a reseller would buy stuff by the truckload
without much hassle and that would avoid carting it to the dump.
Are there some funny acco
Perhaps the future of timing is the newly developed
(and not yet commercialized) Mercury ion frequency
standard.
Also, some high end rubidium (such as Perkin-Elmer)
manufacturers are able to develope 133Rb clocks having
> 450 000 hours MTBF! That'a a lot of nanoseconds!
73 de Normand VE2UM
--- Ja
"Jack Hudler" <[EMAIL PROTECTED]> wrote:
> Which begs the question of; who's cesium standard will we buy in surplus
> market?
>
> From my POV (which could be myopic), a few CBT manufacturers are controlling
> what remains of this market (no I'm not a conspiracy nut, it's just
> business), so it see
In a message dated 3/16/2007 11:34:56 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
The Cesium atoms make a one-way trip from one end of
the tube the other; from a nice solid/liquid pool of silvery
cesium in the oven to a splattered mess in the getter. So
there's no restoring the tube t
In message: <[EMAIL PROTECTED]>
Chuck Harris <[EMAIL PROTECTED]> writes:
: Robert Lutwak wrote:
: > There's no reason that you shouldn't see just as many CsIIIs, Cs4000s, and
: > 5071s on the used market tomorrow as you see 4040s and 506Xs today, just as
: > soon as they trickle down
Robert Lutwak wrote:
> There's no reason that you shouldn't see just as many CsIIIs, Cs4000s, and
> 5071s on the used market tomorrow as you see 4040s and 506Xs today, just as
> soon as they trickle down through the same channels as the older units did.
Well, there is one reason, and that is the
From: "Robert Lutwak" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Fri, 16 Mar 2007 18:09:43 -0400
Message-ID: <[EMAIL PROTECTED]>
Robert,
> There's no reason that you shouldn't see just as many CsIIIs, Cs4000s, and
> 50
Hudler" <[EMAIL PROTECTED]>
To: "'Discussion of precise time and frequency measurement'"
Sent: Friday, March 16, 2007 2:25 PM
Subject: Re: [time-nuts] Question for the cesium nuts.
> Which begs the question of; who's cesium standard will we buy in surplus
>
arch 2007 22:01
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
What about rubidium standards? Are they more common due to lower price?
Speaking of which, Ebay has several "Rubidium atomic clock smallest cell
frequency standa
What about rubidium standards? Are they more common due to lower price?
Speaking of which, Ebay has several "Rubidium atomic clock smallest
cell frequency standard" listed for US$20. What are these modules?
LtCol Keith E. Brandt, MD, MPH
USAF-NASA Aerospa
From: "Rob Kimberley" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Fri, 16 Mar 2007 21:44:52 -
Message-ID:
> Interesting question!!
>
> Don't think we'll see an H2 MASER on EBay, as just too expensive, plus only
> a f
reading.
Rob
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Hal Murray
Sent: 16 March 2007 20:51
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
> The Russians seem to concentrate on H2 M
> The Russians seem to concentrate on H2 Masers (Kvarz, and Vremya).
Maybe we don't have to worry about cesium lifetime. What are the
alternatives?
When will H2 Masers be affordable on eBay? ...
--
These are my opinions, not necessarily my employer's. I hate spam.
_
Kvarz,
and Vremya).
Anyone know of others??
Rob K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Jack Hudler
Sent: 16 March 2007 18:26
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Question for the cesi
From: "Jack Hudler" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Question for the cesium nuts.
Date: Fri, 16 Mar 2007 13:25:47 -0500
Message-ID: <[EMAIL PROTECTED]>
> Which begs the question of; who's cesium standard will we buy in surplus
> market?
>
>
lock.
Those of us that really get into the hobby realize that "time"
is money: each digit of accuracy costs you another digit of
budget.
/tvb
http://www.LeapSecond.com
- Original Message -
From: "Jack Hudler" <[EMAIL PROTECTED]>
To:
Sent: Friday, March 16, 2007
scussion of precise time and frequency measurement
Subject: Re: [time-nuts] Question for the cesium nuts.
> What are we going to do when all the CBTs owned by amateurs start to end
of
> life?
Buy another instrument off of Ebay. It'll be cheaper, more accurate, and
last longer than the old one.
Let me try to remember some of the answers to this question
that I heard from the cesium guys (I was only the RF guy on
the 5071A, so I know just enough about cesium to be dangerous :-)
The tubes rarely if ever fail because they run out of cesium.
Sometimes they fail because the electron multiplie
> What are we going to do when all the CBTs owned by amateurs start to end of
> life?
Buy another instrument off of Ebay. It'll be cheaper, more accurate, and last
longer than the old one. Plus, it'll have microprocessor control and thus be
cooler and more entertaining for the hackers.
> Any
It seems to me that like all good things they must come to and end.
If all CBTs have a life expectancy that varies depending on the
manufacturer.
What are we going to do when all the CBTs owned by amateurs start to end of
life?
I for one am certainly not going to buy one, not at those prices! (U
63 matches
Mail list logo
