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
> Now where can I get a lesson on interpreting Lissajous patterns and
> how to calculate frequency (or phase) difference from these patterns ?
You can probably work it out well enough by considering a handful of simple
cases.
You have the advantage of knowing that the frequencies are close enou
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
I bailed out of work early today and got to play with this receiver.
I turned it on, and turned on my GPSDO I built and let them run for
about 2 hours. Now I know this is not long enough. but I really wanted
to see what a Lissajous pattern looked like.
After both locked up and sat for a while, I ha
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
> 5071s on the used market tomorrow as you s
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.
So far, of the modern cesium standards, I've only seen a few 5071s on
Much more common. We're talking tens of thousands of these manufactured
against a few hundred Caesium (Cesium) standards, and a handful of MASERS in
a year, so priced accordingly.
Just looked at the item on EBay. This is the "physics package" from a Rb
standard including the Rb cell. It would need
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 few made each year. Rather large beasts
Interesting question!!
Don't think we'll see an H2 MASER on EBay, as just too expensive, plus only
a few made each year. Rather large beasts - see the link below, and
installed & commissioned by manufacturer on site. The active ones are in the
$150K - $200K price range new, passive ones less. Symm
> 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.
_
The only people I know making Cs now are Symmetricom (the old Datum/FTS +
recent Agilent acquisition), FEI (although they don't think they make many
now), and Temex in France. Heard rumours of some being made in Japan, but
not sure if and who. The Russians seem to concentrate on H2 Masers (Kvarz,
a
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?
>
> Besides you guys (Symmetricom), who is buil
Jack,
You bring up a good point, but...
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 that once that's done. Think
toothpaste. Think ballpoin
Which begs the question of; who's cesium standard will we buy in surplus
market?
Besides you guys (Symmetricom), who is building Cesium standards that
haven't yet been absorbed by Symmetricom? (note this is not meant to be
derogatory).
Certainly most if not all the 5060, 5061, and 5062 are either
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
Hello everybody,
I have the antenna discussed and actually shown by accelium
on ebay as "GPS ANTENNA HP 58532A L1 LUCENT SYMM...",
in my hands, but mine is labelled underneath as:
DATUM IRVINE
ANTENNA-GPS
P/N 2640NW-D/E Date: 38/00
The gain is (nominal) 26dB, according the label,
(unfortunatel
Any chance he would sell some more?
The XL-AK is a current Symmetricom model still listed on their site (which
is good), though it's using the older TrueTime chassis (and the manual has
TrueTime on the front) so it's probably at the bottom of the line.
I would have thought the base crystal would
I think Randy pretty much answered your question.
I've noticed the seller 'accelium' likes to spam keywords in the auction
titles (AND TYPE IN ALL CAPS), which can make the item for sale somewhat
misleading / confusing.
Jason
> I just purchased a GPS antenna on eBay that was listed as an HP-5853
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