Hi
> On Feb 6, 2021, at 5:44 PM, Bill Notfaded wrote:
>
> Let me know when I can buy one please! I'm not kidding. ;^}
>
This thread has drifted from Hydrogen Masers, to Mercury Ion clocks,
to long beam Cs standards, and passes things like 5071’s while doing so.
Which of those items are
Although Mr. Wineland's IQ must be at least 50 points higher than mine, we do
have something in common. I too owned a '36 Ford in my youth, about the same
time as he did, although mine was a Cabriolet not a coupe, and I fitted it with
an OHV Studebaker V8, a smaller displacement clone of a
Let me know when I can buy one please! I'm not kidding. ;^}
Bill in Arizona
On Sat, Feb 6, 2021, 1:25 PM Tom Van Baak wrote:
> > ptti/1981papers/Vol%2013_30.pdf
>
> Note the dialog on the last page. Dave Wineland went on to win the 2012
> Nobel prize in Physics:
>
>
>
> ptti/1981papers/Vol%2013_30.pdf
Note the dialog on the last page. Dave Wineland went on to win the 2012
Nobel prize in Physics:
https://www.nist.gov/nist-and-nobel/dave-wineland/person-behind-nobel-prize-dave-wineland
The first photo is fun, "Before he was a quantum mechanic...". Then
Cool !!!
> On Feb 6, 2021, at 1:05 PM, Attila Kinali wrote:
>
> Moin,
>
> On Wed, 10 Jul 2019 10:55:07 -0700
> "Richard (Rick) Karlquist" wrote:
>
>> FWIW, about 20 years ago, Len Cutler and Robin Giffard of 5071A fame
>> built several Hg ion clocks to be shipped to some govt customer I
>>
Moin,
On Wed, 10 Jul 2019 10:55:07 -0700
"Richard (Rick) Karlquist" wrote:
> FWIW, about 20 years ago, Len Cutler and Robin Giffard of 5071A fame
> built several Hg ion clocks to be shipped to some govt customer I
> don't remember. One of the clocks was dropped by the shipping company
> UPS or
In message <009b66fe-c0b0-4f80-8a79-4a487dcb0...@yahoo.com>, Demetrios Matsakis
via time-nuts writes:
> Demetrios Matsakis, as of this Saturday a USNO retiree, and as of August 1 a
> consultant for Masterclock.
Do Time Lords get to keep their TARDIS in retirement ?
Best wishes for
For what it’s worth, the mercury ion clocks were shipped to the US Naval
Observatory. HP shortly thereafter did a market survey and concluded there was
not enough profit in it. They did allow Len and Robin to give short-answer
support, and the project fell to me. I found the clocks were
I recently got some prices on Russian masers. The passive masers are about
$us90K and the active masers are about $US250K. There’s apparently quite a
bit of paperwork to do with the export licensing but it just needs a bit of
patience :-)
Cheers
Michael
On Thu, 11 Jul 2019 at 3:01 am, Bob kb8tq
about 20 years ago, JPL was operating a Hg ion clock at the Tidbinbilla
tracking station just outside Canberra, Australia. I think they installed a
few at various nodes in the Deep Space Network at the time. It operated for
a few years but never reliably enough to be a useful UTC clock ( we were
jim...@earthlink.net said:
> I wonder what it would cost to build a trapped Hg ion clock - I don't think
> it's $10M, but it might be in the range of $500k-1M if you pay people to do
> the work. Things like the quadrupole trap and ion sources are catalog
> items.
If you are lucky, you might
On 7/10/19 10:55 AM, Richard (Rick) Karlquist wrote:
FWIW, about 20 years ago, Len Cutler and Robin Giffard of 5071A fame
built several Hg ion clocks to be shipped to some govt customer I
don't remember. One of the clocks was dropped by the shipping company
UPS or FedEX) and destroyed. Only
FWIW, about 20 years ago, Len Cutler and Robin Giffard of 5071A fame
built several Hg ion clocks to be shipped to some govt customer I
don't remember. One of the clocks was dropped by the shipping company
UPS or FedEX) and destroyed. Only then did Len learn that HP was
self insured, probably as
>
https://www.microsemi.com/product-directory/active-hydrogen-maser/4123-mhm-2010-active-hydrogen-maser
Corby,
Did you notice a week or two ago there's an updated version:
https://www.microsemi.com/product-directory/active-hydrogen-maser/5548-mhm-2020-active-hydrogen-maser
There are links to
On 7/10/19 6:10 AM, Azelio Boriani wrote:
Tom Van Baak said on Aug 29, 2013:
The pursuit of precision tends to be exponential rather than linear.
...
As a rough example in the ADEV world:
- for 1e-11, you can buy almost any XO, TCXO, or risky OCXO for $10.
- for 1e-12, you can find a
Hi
One of the gotcha’s if you are in the US is that the most often seen “alternate
brand” of Maser comes out of Russia. Depending on the phase of the moon and
just what the rule book says this week, you may well not be able to bring one
into the country.
Back when things were a bit more
Perrier,
Hi!
Depends on the type and model, Active or Passive Maser etc.
I believe new active Masers run in the 1/4 million dollar range.
T4 science offers some nice Passive Masers but I don't know the cost.
pH Maser 1008 https://www.t4science.com/products/phmaser-1008/
On the basis of just
Asked and answered before I think, but as far as I know a new maser is in
the 2-300K euro range, a used one you can perhaps expect to pay about a
tenth of that - if you can find one. Not that many around, but some of the
older ones on VLBI sites are getting a bit long in the tooth. If you are
Tom Van Baak said on Aug 29, 2013:
>The pursuit of precision tends to be exponential rather than linear.
...
>As a rough example in the ADEV world:
>- for 1e-11, you can buy almost any XO, TCXO, or risky OCXO for $10.
>- for 1e-12, you can find a reputable OCXO on eBay for under $100.
>- for
Perry,
The only H-maser with which I've had direct experience (the MHM-2010) costs
around $250,000 new. But there are some other brands, mostly foreign.
The immediate operating cost is that of AC power. IIRC, the '2010 uses
about
100W or maybe 125W, *all the time*. The H-maser is *not* the
Yo Bubba Dudes!,
OK, I'll finally ask the question that probably a lot of list members wanted to
know but were reticent to ask.
First, what is the price of one of a new Hydrogen Maser? (This is important if
I win the lottery.)
Second, what would be prices for used Hydrogen Maser in *reasonable*
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