I've not seen any timing receiver with that amount of hardware on one board.
I'm guessing some sort of Telco processor or I/O board.
Interesting site though, and as I like a bit of mental challenge, I'm book
marking it!
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com
On 09/01/11 03:56, Magnus Danielson wrote:
Hi!
My RS XSRM Rubidium is having problems. It behaves as there is no light
from the lamp, and I can't see any light from it, but I let it warm up
again. The manual doesn't give clear indication on how one should
observe light, but it seems like there
On 09/01/11 05:17, paul swed wrote:
Lamp is orange purple
Thanks, this is what I recall but never bothered to check myself.
Where is that box of gas-lamps to help identify alkali metals?
Cheers,
Magnus
___
time-nuts mailing list --
Magnus Danielson wrote:
On 09/01/11 05:17, paul swed wrote:
Lamp is orange purple
Thanks, this is what I recall but never bothered to check myself.
Where is that box of gas-lamps to help identify alkali metals?
Cheers,
Magnus
Use your spectrometer.
Spectrum should be similar to that
On 09/01/11 11:20, Bruce Griffiths wrote:
Magnus Danielson wrote:
On 09/01/11 05:17, paul swed wrote:
Lamp is orange purple
Thanks, this is what I recall but never bothered to check myself.
Where is that box of gas-lamps to help identify alkali metals?
Cheers,
Magnus
Use your
Being a Shera Fan I finally broke down and bought a Tbolt. I experimented
with a foam enclosure with roughly 1 centimeter on all sides. What I found
that it only increased the board temperature by 19 C. It was still as
sensitive to ambient. Thanks to Lady Heater it even shows an increase
In message 3150c.48e44656.3a5b1...@aol.com, ewkeh...@aol.com writes:
Being a Shera Fan I finally broke down and bought a Tbolt. I experimented
with a foam enclosure with roughly 1 centimeter on all sides.
Try to think of your foam as a resistor, your alu box as a capacitor
and heat as a
Thanks Poul-Henning makes sense Bert
In a message dated 1/9/2011 11:06:34 A.M. Eastern Standard Time,
p...@phk.freebsd.dk writes:
In message 3150c.48e44656.3a5b1...@aol.com, ewkeh...@aol.com writes:
Being a Shera Fan I finally broke down and bought a Tbolt. I experimented
with a foam
Hi
The answer to the how far can you go is (as always) that depends.
You can tweak a 10811 balance wise to get it's thermal gain up 10X over the
factory settings. You may be able to go higher, but 10 is what's been
published. That will give you an oscillator who's crystal is very insensitive
Hi
I'm sitting here running data on a bunch of TBolts and the like. Might that
data be useful to others - maybe. Could it be useful 100 years from not -
doubtful. I have the ability to create enormous amounts of likely useless
trivia. To me the burring the useful nugget in the mountain of
Have you thought of using RRD (Round Robin Database).
RRD is a CSV format which stores value vs time and is generally used for
archiving network performance data which is generally kept for years. This
format has the advantage of compactness and arbitrary x y scaling.
MRTG (Multi-Router
Bert:
Make sure you are working on the correct problem.
I find that the normal (in accordance with published specifications) daily aging
of the crystal exceeds the daily variation of frequency with temperature of
a stock 10811 in a benign (office or home) environment.
If you are seeing
On 09/01/11 12:12, Magnus Danielson wrote:
On 09/01/11 11:20, Bruce Griffiths wrote:
Magnus Danielson wrote:
On 09/01/11 05:17, paul swed wrote:
Lamp is orange purple
Thanks, this is what I recall but never bothered to check myself.
Where is that box of gas-lamps to help identify alkali
This link shows the light from a rubidium spectral lamp.
Its appearance is quite similar to the rubidium lamps used in various
rubidium standards.
There can be a slight bluish cast also, especially at low temperatures as
the lamp warms up.
I'm not familiar with the RS but depending on the
On 09/01/11 17:05, Poul-Henning Kamp wrote:
In message3150c.48e44656.3a5b1...@aol.com, ewkeh...@aol.com writes:
Being a Shera Fan I finally broke down and bought a Tbolt. I experimented
with a foam enclosure with roughly 1 centimeter on all sides.
Try to think of your foam as a resistor,
Graham,
I have no problems with my 10811 I just want to experiment with ways to
improve performance, right now I have several that are in the E-13 range
between 1 and 100 sec and am getting greedy and looking for ways to improve one
of them. Want to take it step by step and not degrade a
Q) Has anyone experimented with the amount of insulation on a 10811
oscillator?
a) Look inside a double oven 10811 to see one example of what works.
Q) None of the hp/Agilent bench test equipment that uses these
oscillators uses insulation. Perhaps that's a clue.
a) It is not much of a
On 09/01/11 18:44, cdel...@juno.com wrote:
This link shows the light from a rubidium spectral lamp.
Its appearance is quite similar to the rubidium lamps used in various
rubidium standards.
There can be a slight bluish cast also, especially at low temperatures as
the lamp warms up.
I'm not
Thanks for all the info. Agree after my tests on the Tbolt, that is why I
will place large mass around it, will keep it close to ambient and move
slowly.
What is the zero G axis?
Presently oven current is 65 mA down from 95 at room temp so I have room to
go but I will monitor over ambient
When I was working with a group that was buillding astronomical
cameras using CCD chips we wanted to keep the CCD chip at a very
constant temperature that was much lower than ambient. This is
actually a harder problem then building a crystal oven but still not
out of amateur's range.We ued a
My experiences placing my thunderbolt board in various insulated containers
show little or no improvement over simply putting a cardboard box over it to
keep drafts away. As time allows I'm going to re run some of the tests using
my 5370 and an external standard vs relying on the data from
I use Alu extrusion that is used on commercial windows, got it twenty years
ago, but they may still use it. Bert
In a message dated 1/9/2011 3:09:19 P.M. Eastern Standard Time,
mspencer12...@yahoo.ca writes:
My experiences placing my thunderbolt board in various insulated
containers
A simple box is fine for many Tbolt applications.
Much depends on the TBolt Osc and what setting you have, especially the TC
and damping.
With the factory default setting you can pretty much put the thing in an
outside unsheltered shed and have it work OK,
But it will not be the best it can
Anyone have any suggestions? Thanks!
Original Message
Subject:Request
Date: Sun, 9 Jan 2011 17:41:42 -0500
From: Larry Padavich lpadav...@gmail.com
To: rhyol...@nettally.com
I need a small gps device I can ping via smart phone. Is this possible ?
Larry
--
What do you need from the GPS? Time, position, both?
Most smart phones have GPS built in these days.
Can you give some more details on your requirements?
Rob Kimberley (in UK)
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Joe
Being a Shera Fan I finally broke down and bought a Tbolt. I experimented
with a foam enclosure with roughly 1 centimeter on all sides. What I found
that it only increased the board temperature by 19 C. It was still as
sensitive to ambient. Thanks to Lady Heater it even shows an increase of
Does anyone have actual measurements with and without the outer oven
controlled by a PID?
see plot:
http://www.febo.com/pipermail/time-nuts/attachments/20100223/c94d5eec/attachment-0001.gif
on posting
http://www.febo.com/pipermail/time-nuts/2010-February/045279.html
To avoid misunderstanding
On 10/01/11 00:59, Tom Van Baak wrote:
Being a Shera Fan I finally broke down and bought a Tbolt. I
experimented with a foam enclosure with roughly 1 centimeter on all
sides. What I found that it only increased the board temperature by 19
C. It was still as sensitive to ambient. Thanks to Lady
At 06:36 PM 1/9/2011, Tom Van Baak wrote...
The outer oven was a hack so Z3801A could meet telecom cell tower cold
weather warm-up specs. In other words, the better performance they
were looking for in that case was warm-up time; not a tempco or
frequency stability spec.
The Nortel GPSR
WarrenS wrote:
a) Aging Rate spec 5e-10, easy to find ones that are 100 times better
That is news to me, having looked at 100's of 10811's.
b) Temp TC for small changes, easy to find/Made them 100 times better with
outer oven
I'm surprised, but haven't detailed knowledge. The outer
oven
Interesting thanks. At the moment my Tbolt board (I just have a bare board
without an enclosure) seems to work best with a 400 to 600 second TC and
damping in the range of .7 to 1. I'm thinking mounting it in a heavy metal
enclosure may improve things and allow the use of longer TC's.
I think Larry wants something small to fit in a rocket, to find GPS
position and relay via GSM or 3G network (here in US).
On 1/9/2011 6:11 PM, Rob Kimberley wrote:
What do you need from the GPS? Time, position, both?
Most smart phones have GPS built in these days.
Can you give some more
Search eBay for GPS Tracker. Also sold by various Spy Stores on the
Internet.Frequently used by amateur private investigators, law enforcement and
governmentagents to track persons of interest.
-- FL
--- Den søn 9/1/11 skrev Joe Leikhim jleik...@leikhim.com:
Fra: Joe Leikhim
Indeed. The ADCMP573 and ADCMP553 are already on my digikey order list. :)
Complete with nice pecl output that I can connect to the LVPECL input of the
spartan-6.
Thanks for the tip though, always good to know I'm not the only one who thinks
of using it. let's call it confirmation. Thanks! :)
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