Hi Bob,
I went and looked at your weather page and found it quite confusing. I guess
you are in Cupertino, yet the first chart states Sunnyvale. I guess after the
first two charts is the data for your weather station represented in two
different formats of a spreadsheet style and then a data
Brice--
I'm also running weather display:
http://home.comcast.net/~weatherbox/wxsc/wx.html
I don't know an easy way to automagically sync the Davis clock with the tbolt
other than what WD offers (LH and WD are hosted on the same Windows box, and LH
whacks the clock on that box). I make sure
It seems OK after replacing the silver-mica and feedthrough capacitors, and
reflowing all of the solder joints. There were no jumps over 8 hours from a
cold start, and it had been glitching at least once per hour beforehand.
Corby, do you remember the loop filter values (and kVCO) you used for yo
Stanley wrote:
ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast
Interesting suggestion. Rohn is well known to me, though I don't
typically think of them for things like push-up masts.
For those suggesting 6-10' of pipe, at my rooftop I get a reception
cone of about 50 degrees
Heathkid wrote:
Sounds like the parts of a "salvaged" SEM would be a good start for a
project such as this (assuming the diffusion pump is included - I've
been looking for one for a while but it seems the pumps are almost
*always* missing). But still, if you could find one locally (freight is
Peter Krengel wrote:
Hello,
I'm looking for manufactors/distributors of High Q (high Epsilon r) ceramic materials.
Best would be cylindrical forms of ~ 10-30mm diameter.
Mfrs...
Epson
Coors
Murata Erie
TDK
All have reps world wide
google "alumina substrate"
That will get you started with m
Surplus (free to good home table)? Try finding someone who works with these
pumps every day who will even part with an OLD pump (even if it doesn't
work) just because... a broken spare is better than not having anything at
all. ;)
- Original Message -
From: "jimlux"
To: ; "Discussi
Corby Dawson wrote:
John F.
The pumps can be rebuilt. Duniway Stockroom here in CA. among others does
the deed.
Duniway is great for odds and ends on vacuum gear in general. Sure, you
can buy stuff surplus, but you always wind up needing some funky
plumbing, or a seal kit, or some rebuild wi
Sounds like the parts of a "salvaged" SEM would be a good start for a
project such as this (assuming the diffusion pump is included - I've been
looking for one for a while but it seems the pumps are almost *always*
missing). But still, if you could find one locally (freight is $$$) there
are a
J. Forster wrote:
Two things helped a lot: Big pumps and an LN2 cold trap.
The LN2 trap (as long as it is kept filled) will condense most everything
except a few "permanent" gases. It also stops the backflow of pump oil.
However, if something goes wrong, you would not believe the mess.
A techn
Mark J. Blair wrote:
On Sep 2, 2010, at 10:28 AM, Corby Dawson wrote:
This EFOS maser typically runs with the two vacuum pressures below
1.5 X 10-6 Torr. (as measured via the ion pump current)
Maximum should not exceed about 3.6 X 10-6 Torr for either pump.
The internal vacuum will drop to abo
Bob,
Don't get me started on my Davis Instruments Vantage Pro 2 with "BIRDS"...
and the rain bucket! ;) How many times have you cleaned yours out this
year? Spiders and Wasps are the worst. But... unfortunately, my flag pole
is now the weather station mount (wireless version) and it's too
If your nearby houses and obstructions are not high, IE. if the houses
there are single story, you may be able to get away with what I have
done. Instead of fixing something on the house, I've attached a couple
of antenna to the top of one of my washing line poles in the garden as
this faces South
I've a Symmetricom(HP) 58532A antenna on a six foot mast -- T6061 aluminum
schedule 40 pipe. Not as cheap as cast schedule 40 from the home store, but a
lot lighter! The previous mast was a length of cheezy Radio Shack antenna mast
-- thin wall stuff. The mount for the 58532A wanted larger diame
$32.61 for me but maybe you are further away, heavy stuff, maybe it would pay
to
shop for a closer vendor.
Stanley
- Original Message
From: Richard W. Solomon
To: Discussion of precise time and frequency measurement
Sent: Thu, September 2, 2010 8:49:24 PM
Subject: Re: [time-nuts] F
Make sure you are sitting down when you check the shipping
charges.
73, Dick, W1KSZ
-Original Message-
>From: Stanley Reynolds
>Sent: Sep 2, 2010 9:16 PM
>To: Discussion of precise time and frequency measurement
>Subject: Re: [time-nuts] Freestanding mast
>
>ROHN 9H50 34 Foot Telescop
Hello Charles,
Last September I had some roof work done and I had added 2 each 1-1/2"
vent pipe penetrations just below the ridge.
Now I have a place to add the GPS antenna, either a hockey puck type or
a more sophisticated one.
The hockey puck was added to a length of PVC conduit to penetra
Picked that one as it fit the 3" wide request and is UPS shippable. The
brackets
and ground plate were also available.
Stanley
- Original Message
From: J. Forster
To: Discussion of precise time and frequency measurement
Sent: Thu, September 2, 2010 8:25:35 PM
Subject: Re: [time-nut
Hi
There are a lot of chimney mount antenna supports. They should get you up 6
feet above the top of the chimney. Simple to install and pretty cheap.
Bob
On Sep 2, 2010, at 8:46 PM, "Charles P. Steinmetz"
wrote:
> I'm curious what the best freestanding mast is for a timing antenna (think
I was just about to suggest a ham antenna tower. The triangular truss
design is very rigid, yet presents low wind loading. I think there are
application notes that help with siting and selection.
Rohn is a very standard and pretty well respected name in the business.
They also have a good selectio
On 9/2/2010 7:46 PM, Charles P. Steinmetz wrote:
> I'm curious what the best freestanding mast is for a timing antenna
> (think Lucent timing antenna or marine "mushroom" GPS antenna -- light
> and pretty small). The mast would have its highest support at rooftop
> or chimney-top level, and coul
ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast
http://www.3starinc.com/rohn_telescopic_masts.html
I don't know this vendor just the first that came up in google.
Stanley
- Original Message
From: Charles P. Steinmetz
To: Discussion of precise time and frequency meas
What is the effect of mast movement with wind? Is there a tradeoff if
the antenna moves around too much? I expect that there would be some
additional noise on the timing measurements.
Regards,
Laurence Motteram
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun.
It may not be a problem where you are, but I should think that
lightning might come to mind.
Do you really want your GPS antenna up very high?
-Chuck Harris
Charles P. Steinmetz wrote:
I'm curious what the best freestanding mast is for a timing antenna
(think Lucent timing antenna or marine "m
Hello,
I'm looking for manufactors/distributors of High Q (high Epsilon r) ceramic
materials.
Best would be cylindrical forms of ~ 10-30mm diameter.
Has anybody informations where to buy?
Thanks in advance
Peter, DG4EK
___
time-nuts mailing list --
I'm curious what the best freestanding mast is for a timing antenna
(think Lucent timing antenna or marine "mushroom" GPS antenna --
light and pretty small). The mast would have its highest support at
rooftop or chimney-top level, and could extend from there as far
downward as the ground with
In a message dated 02/09/2010 01:58:00 GMT Daylight Time,
stanley_reyno...@yahoo.com writes:
Boards will be here Friday September 3.
---
Hi Stanley
Many thanks for the update, I'd like 4 Mixer PCBs please and 2 DDS PCBs
and have just made payment for these via Paypal.
reg
Hi Corby,
Thanks. Duniway was the company, but it slipped my mind. They have about
the best prices on Conflat stuff going, I think, outside of eBay.
Best,
-John
==
> John F.
>
> The pumps can be rebuilt. Duniway Stockroom here in CA. among others does
> the deed.
>
> Corby
_
John F.
The pumps can be rebuilt. Duniway Stockroom here in CA. among others does
the deed.
Corby
Moms Asked to Return to School
Grant Funding May Be Available to Those That Qualify.
http://thirdpartyoffers.juno.com/TGL3141/4c800a3d11a6
> John F.
>
> The internal pump lifetime is reduced as it has to pump the waste
> Hydrogen after it leaves the bulb.
OK. Understood.
> These pumps elements "swell" after burying increasing amounts of Hydrogen
> and eventually short out.
Some pumps have replacable elements. Do these? Or do you ha
Hi Bob,
it was only shortfor time on the WeirdStuff-side on, after that on the
firms shop/eBay side was the spoken situation, but yet its finished
too... :-(
http://cgi.ebay.ch/ws/eBayISAPI.dll?ViewItem&item=300457580821&ssPageName=STRK:MEWAX:IT
Karesz
2010/9/2 Robert Benward :
> Leigh,
> What wa
John F.
The internal pump lifetime is reduced as it has to pump the waste
Hydrogen after it leaves the bulb.
These pumps elements "swell" after burying increasing amounts of Hydrogen
and eventually short out.
Corby Dawson
Mortgage Rate
Leigh,
What was your search term? The link does not produce anything.
Bob
- Original Message -
From: "Leigh L. Klotz, Jr WA5ZNU"
To: "Discussion of precise time and frequency measurement"
Sent: Thursday, September 02, 2010 12:06 PM
Subject: [time-nuts] WeirdStuff tbolt $75
Weir
> John F.
>
> I don't have an RGA as there are no leaks to speak of in the Maser.
Well, that's good!
> I do have an annoying leak in my roughing manifold but plan to pump it
> down and spray some helium around the suspect area and see if my
> millitorr gauge will respond.
The choice of stuff to
we come from a different planet
we mean no harm
On Thu, Sep 2, 2010 at 3:31 PM, Corby Dawson wrote:
> Bill,
>
> Here's a PIX if it does not get scrubbed off!
>
> Corby
>
> Mortgage Rates Hit 3.25%
> If you owe under $729k you probably
John F.
I don't have an RGA as there are no leaks to speak of in the Maser.
I do have an annoying leak in my roughing manifold but plan to pump it
down and spray some helium around the suspect area and see if my
millitorr gauge will respond.
It's a tiny leak as I can do a pumpdown OK but I'd lik
Hi Corby,
I don't doubt it for an instant. Oil pumps just don't hack it for UHV.
If you are going to use oil pumps for almost anything serious you must use
an LN2 trap.
In a He Leak Detector, for example, an oil system is often used. BTW,
Varian specifically say not to use Silicone oils as they
Bill,
Here's a PIX if it does not get scrubbed off!
Corby
Mortgage Rates Hit 3.25%
If you owe under $729k you probably qualify for Obama's Refi Program
http://thirdpartyoffers.juno.com/TGL3141/4c7ffbafe538be103am04duc<>_
On Sep 2, 2010, at 12:00 PM, Scott Newell wrote:
> I think I took that same class (sub-basement of Steele, right?) just a few
> years after you.
That would be the one! See, I knew that most anybody who attended that
particular institution would recognize my description of that piece of
equipme
John F.
Google Maser contamination and you will find a Russian blurb describing
what I'm talking about. Even with LN2 traps they had problems.
Corby Dawson
$350,000 Life Insurance
Coverage as low as $13.04/month. Free, No Obligation Quo
At 01:17 PM 9/2/2010, Mark J. Blair wrote:
Back in college, I took a semiconductor device physics course which
included a lab where we made simple ICs (the most complex devices
were SR latches). We had a vapor deposition system for plating on
gold or aluminum, which pumped the chamber down be
>With the triode pumps you only need the vacsorbs for roughing, as they
will start at a higher pressure!
I have changed two ion pumps so far and only used the vacsorbs to get
back in operation.
The vacsorbs and accessories were eBay buys over a period of a few months
and very reasonable compared
Sorry, sorgot to include link;
http://cgi.ebay.com/330453047354
also more than 10 available.
On 9/2/2010 1:31 PM, Oz-in-DFW wrote:
> There are several packaged versions up for $100 and modest shipping.
>
> On 9/2/2010 1:29 PM, Oz-in-DFW wrote:
>> I'm guessing they had 18 and someone bought the
There are several packaged versions up for $100 and modest shipping.
On 9/2/2010 1:29 PM, Oz-in-DFW wrote:
> I'm guessing they had 18 and someone bought the last.
>
> On 9/2/2010 1:25 PM, Mark J. Blair wrote:
>> On Sep 2, 2010, at 10:06 AM, Oz-in-DFW wrote:
>>> http://cgi.ebay.com/300457580821
>>
Two things helped a lot: Big pumps and an LN2 cold trap.
The LN2 trap (as long as it is kept filled) will condense most everything
except a few "permanent" gases. It also stops the backflow of pump oil.
However, if something goes wrong, you would not believe the mess.
A technician that worked fo
I'm guessing they had 18 and someone bought the last.
On 9/2/2010 1:25 PM, Mark J. Blair wrote:
> On Sep 2, 2010, at 10:06 AM, Oz-in-DFW wrote:
>> http://cgi.ebay.com/300457580821
>>
>> And still more than 10 available.
>
> That listing appears to have ended. If I had gotten there in time, I'd ha
On Sep 2, 2010, at 10:06 AM, Oz-in-DFW wrote:
> http://cgi.ebay.com/300457580821
>
> And still more than 10 available.
That listing appears to have ended. If I had gotten there in time, I'd have
been tempted to buy a couple of them. My Thunderbolt is flaky (stops outputting
serial data or res
On Sep 2, 2010, at 10:28 AM, Corby Dawson wrote:
> This EFOS maser typically runs with the two vacuum pressures below 1.5 X
> 10-6 Torr. (as measured via the ion pump current)
>
> Maximum should not exceed about 3.6 X 10-6 Torr for either pump.
>
> The internal vacuum will drop to about 1 X10-7
Back to the Palladium plug for a minute. The problem you mentioned about
the "valve" not shutting off completely is analogous to the problem with
HeCd LASERs.
In a HeCd LASER, there is an oven with Cd metal in it that is heated to
provide Cd ions to the discharge tube. There is also He in the tube
FYI, Ron Walsworth did his PhD in Prof. Ike Silvera's Group at Harvard.
Among his advisors were Robert Vesseau of SAO/CFA, the builder of a number
of very high performance H2 MASERS.
Ron's experiment was trying to build an H2 MASER with superfluid He coated
walls.
Best,
-John
Ah, yes. Express courier service is always spendy.
-Pete
On 09/02/2010 10:09 AM, K. Szeker wrote:
Hi Peter,
You are right, in the text/details are, for same destination, more
moderate prices too
Under the cover shipments costs was the expensivste to see...
US $105,35 Deutschland UPS Worldwide
> John F.,
>
> The Palladium valve is also known as a palladium leak or a palladium
> purifier. In the Maser the use is as the "leak". It would also serve to
> purify the H2 BUT any other impurities lodge in the Palladium plug and
> can eventually cause it to fail. Early symptoms manifest as having
This EFOS maser typically runs with the two vacuum pressures below 1.5 X
10-6 Torr. (as measured via the ion pump current)
Maximum should not exceed about 3.6 X 10-6 Torr for either pump.
The internal vacuum will drop to about 1 X10-7 Torr if the Hydrogen to
the disassociator is turned off.
One
I am rally interested to be part of a team of people with the target to built
an active H Maser.
If there are in the world persons who are really interested in, it will be a
good starting point.
To built specific parts there are several way to do it in ham saving mode, for
example for the cavity
> On Wed, 01 Sep 2010 22:37:36 -0700
> jimlux wrote:
>
>> J. Forster wrote:
>> > If you decide to go the zinc/acid route (a very bad idea, IMO) you
>> will
>> > need a compressor. I'd not want anything to do with that! I like
>> living.
>> >
>> > A Lecture Bottle is the way to go.
>>
>>
>> Why wou
Hi Peter,
You are right, in the text/details are, for same destination, more
moderate prices too
Under the cover shipments costs was the expensivste to see...
US $105,35 Deutschland UPS Worldwide ExpressSM
US $96,97 Deutschland UPS Worldwide ExpeditedSM
US $31,05 Deutschland USPS Priority Mail In
Just to remove a variable seemingly causing confusion;
The ebay link is
http://cgi.ebay.com/300457580821
And still more than 10 available.
On 9/2/2010 12:02 PM, Peter Loron wrote:
> Umm, their eBay listing shows like $11 for US domestic shipping and
> $30 to Turkmenistan...seems pretty in lin
Umm, their eBay listing shows like $11 for US domestic shipping and $30
to Turkmenistan...seems pretty in line with reality...
-Pete
On 09/02/2010 09:49 AM, K. Szeker wrote:
And we should not forget the extra expensive "Shipping:$105.35 UPS
Worldwide Express" too...
K.
2010/9/2 Leigh L. K
>
> jim...@earthlink.net said:
>> The gas diffusing out through the drilled bolt.. sure it's drilled, but
>> the
>> conductance is so patheticaly low, you're literally waiting until the
>> gas
>> molecules happen to randomly bounce their wey up the hole.
>
> I've never worked with vacuum gear.
>
>
Metal diaphragm rough, sorbtion, then Ion is the way to go, IMO.
You only need LN2 to run the sorbtion until you get into the Ion range,
then you valve the sorbtion off.
Cryopumps are a PITA, IMO.
FWIW,
-John
==
> Bob Camp wrote:
>> Hi
>>
>> My guess is that you either need a cry
And we should not forget the extra expensive "Shipping: $105.35 UPS
Worldwide Express" too...
K.
2010/9/2 Leigh L. Klotz, Jr WA5ZNU :
> WeirdStuff has tbolts, no case, no info about firmware version, for $75.
>
> They were $495 but I sent them a note saying it wasn't a competitive price
> and the
Sorry, the link showed nothing. They are still on the eBay store. "more
than 10 available" at the time of this writing.
-Bob
On Thu, Sep 2, 2010 at 10:40 AM, Robert Darlington wrote:
> They appear to be gone now.
>
> -Bob
>
>
> On Thu, Sep 2, 2010 at 10:06 AM, Leigh L. Klotz, Jr WA5ZNU <
> le.
They appear to be gone now.
-Bob
On Thu, Sep 2, 2010 at 10:06 AM, Leigh L. Klotz, Jr WA5ZNU wrote:
> WeirdStuff has tbolts, no case, no info about firmware version, for $75.
>
> They were $495 but I sent them a note saying it wasn't a competitive price
> and they lowered it and they appear to
WeirdStuff has tbolts, no case, no info about firmware version, for $75.
They were $495 but I sent them a note saying it wasn't a competitive
price and they lowered it and they appear to be selling out quickly.
http://www.weirdstuff.com/cgi-bin/category.cgi?item=29654
Also on their weirdstuf
I can't resist a chance for a minor rant. Our neighborhood has suffered for
years with noisy land line phone service and occasional outages. They are
caused by degraded underground cables. Usually worse in the winter when
moisture gets into things, but my phone is presently so noisy I can barel
My uW oven does that very well, but not consistently. It occasionally kicks my
laptop off line, but not every time. The oven frequency is not very stable and
it needs the right combination of temperature and phase of the moon to be
exactly at the bad spot long enough to disconnect. You also have
If your serious, the disassociator splits the hydrogen molecules "H2"
into atoms "H" to allow maser operation. I do have an old Interocitor
screen I could mount on top of the Maser. It would look kinda neat!
Oh Corby, you are a man of true wit. I love it
Hadley
A fine is a tax for doin
This discussion reminds me of a time long ago when I
worked at a University. We had one rather obnoxious
Grad Student, who, although brilliant, was a Royal PITA.
So, while constructing his vacuum system, and getting
hassled by him, I located one of the Universities residents,
a large water bug
Hi
That pressure level pretty much rules out mechanical pumps for the operating
mode. A roughing pump would still be needed to get things going. It also takes
the level of machining on the fittings well beyond the reach of most machine
shops. Some of the stuff has to be exact, close to a tolera
Hi
Also to pump the beast clean after you have opened it up
Bob
On Sep 2, 2010, at 4:04 AM, "Poul-Henning Kamp" wrote:
> In message <4c7f5918.7030...@xtra.co.nz>, Bruce Griffiths writes:
>
>> Indicates that the operating pressure at the hydrogen dissociator is
>> likely to be a few Tor
So, the see of Neuchatel has 429 meter o.NN,
the city of Neuchatel/Neuenburg is on so 430-470m.
Somebody can calculate yet a correction - if needed/likes...
K.
2010/9/2 K. Szeker :
> I have the coodinates yet too(but not the hight over see):
> 46.991347,6.913806
>
> regards
>
> 2010/9/2 K. Szeker
Hi
If your WiFi is at 2.4 GHz it could very easily be a microwave oven messing
things up.
Bob
On Sep 2, 2010, at 3:12 AM, d.sei...@comcast.net wrote:
> I used to have a huge problem with my Comcast link going down (in Silicon
> Valley!), but they seem to be MUCH more reliable than a few yea
If the thing has a variable cap to tune the osc. My bet is thats the devil.
In cheapy telco RBs they have given me lots of trouble.
On Wed, Sep 1, 2010 at 11:40 PM, John Miles wrote:
> Good point -- I should swap out the feedthrough as well. There is only one
> in this case, for the power lead-
Hi
In this case the company is the legacy monopoly wire line carrier for this
area. If you want coper wires you go to them. There is no other choice. They do
what ever the government regulators make them do. The supervisor referred to
those regulations in about every third sentence.
Century a
John Miles brought up an interesting question that got lost in the
discussion of high vacuum systems: what about the choice of gas?
Besides H, there is a dual Xe/He system detailed in:
http://www.cfa.harvard.edu/Walsworth/pdf/Bear%20thesis.pdf
And, as mentioned before, Harvard has built Rb maser
Poul-Henning Kamp wrote:
In message <4c7f5918.7030...@xtra.co.nz>, Bruce Griffiths writes:
Indicates that the operating pressure at the hydrogen dissociator is
likely to be a few Torr or so.
The pressure is basically: "As low as possible" in order to minimize
hydrogen collisions (other hydrog
Hi
What the guy was telling me was that they don't want customers who care if
there's a connection or not. Since I do care, I won't be a Century Tel.
customer much longer. I would have switched on the spot, but reprograming the
routers takes a bit of time. Cisco IOS isn't my favorite thing to c
Hi
The cable company can play games on their end to significantly impact what you
get at the modem.
Bob
On Sep 2, 2010, at 12:53 AM, "Max Robinson" wrote:
> I noticed that after I hooked up my phone to the cable company my computer
> connection became a lot more reliable. Both pass throug
Hi
The troubling part of my situation with Century / Embarq is that a hacked
router in their plant, doing port forwarding poorly, would do create the issue
I saw. The question now is - did they fix it or did the guy doing the
forwarding fix his bug? In my case he's going to be sifting through a
jimlux wrote:
paul swed wrote:
So by those pictures you actually have it working?
Crazy question do you just drive down to your local air gas company
and by
some hydrogen. How do you fill the red bottle?
Just down loaded the tech manual earlier printed out the ops manual.
Thanks
Basically, ye
With Verizon Fios, I have had several instances where a storm has
knocked out my internet, yet my phone, which uses the same fiber,
still works. (Yes, my router was on an ups, and yes the power was
on...)
The internet usually comes back in a day, or so.
Because they have seriously limited the am
I have the coodinates yet too(but not the hight over see):
46.991347,6.913806
regards
2010/9/2 K. Szeker :
> Hi all,
>
> The "Neuchatel MASER" was build by Oscilloquartz in Neuchatel/Switzerland...
> Maybe somebody has the full coordinates of that :-)
>
> Oscilloquartz SA, http://www.oscilloquart
Hi all,
The "Neuchatel MASER" was build by Oscilloquartz in Neuchatel/Switzerland...
Maybe somebody has the full coordinates of that :-)
Oscilloquartz SA, http://www.oscilloquartz.com/
Brévards 16
2002 Neuchâtel
Switzerland
phone : +4132 722
fax : +4132 722 5556
Regards
Karesz
2010/9/1 Ma
The effect of some residual gas species can be gauged from the results of:
http://cos.cumt.edu.cn/jpkc/dxwl/zl/zl1/Physical%20Review%20Classics/atomic/106.pdf
Bruce
Bruce Griffiths wrote:
Bruce Griffiths wrote:
Poul-Henning Kamp wrote:
In message<4c7f5918.7030...@xtra.co.nz>, Bruce Griffiths
Bruce Griffiths wrote:
Poul-Henning Kamp wrote:
In message<4c7f5918.7030...@xtra.co.nz>, Bruce Griffiths writes:
Indicates that the operating pressure at the hydrogen dissociator is
likely to be a few Torr or so.
The pressure is basically: "As low as possible" in order to minimize
hydrogen co
Poul-Henning Kamp wrote:
In message<4c7f5918.7030...@xtra.co.nz>, Bruce Griffiths writes:
Indicates that the operating pressure at the hydrogen dissociator is
likely to be a few Torr or so.
The pressure is basically: "As low as possible" in order to minimize
hydrogen collisions (othe
Reference for palladium-silver leak difficulty at high temperature.
http://tycho.usno.navy.mil/ptti/1988/Vol%2020_10.pdf
Bruce
Bruce Griffiths wrote:
Higher operating temperatures force the use of nickel alloy to replace
the silver palladium alloy traditionally used.
At higher operating tempera
In message <4c7f5918.7030...@xtra.co.nz>, Bruce Griffiths writes:
>Indicates that the operating pressure at the hydrogen dissociator is
>likely to be a few Torr or so.
The pressure is basically: "As low as possible" in order to minimize
hydrogen collisions (other hydrogen, walls) as much as poss
Higher operating temperatures force the use of nickel alloy to replace
the silver palladium alloy traditionally used.
At higher operating temperatures (40c and above) its not possible to
turn off (without cooling it) the palladium leak.
The Russian masers use nickel or nickel alloy instead of pal
jimlux wrote:
Hal Murray wrote:
jim...@earthlink.net said:
The gas diffusing out through the drilled bolt.. sure it's drilled,
but the
conductance is so patheticaly low, you're literally waiting until
the gas
molecules happen to randomly bounce their wey up the hole.
I've never worked wit
Attila Kinali wrote:
On Wed, 01 Sep 2010 20:08:13 +
"Poul-Henning Kamp" wrote:
Yes, but what is the issues relating to sapphire loading? What's the
cost of the sapphire block and having it machined?
It is a saphire tube, a readily available, if not exactly cheap, commodity.
John F.,
The Palladium valve is also known as a palladium leak or a palladium
purifier. In the Maser the use is as the "leak". It would also serve to
purify the H2 BUT any other impurities lodge in the Palladium plug and
can eventually cause it to fail. Early symptoms manifest as having to
heat t
I used to have a huge problem with my Comcast link going down (in Silicon
Valley!), but they seem to be MUCH more reliable than a few years ago. The
problem now appears to be very short outages, which seem to be caused by local
cell interference with my wifi network. Still trying to figure it ou
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