resolution.
There is probably more to this than meets the eye, but where does one
find out about it?
cheers,
Neville Michie
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as the sites appear to be available
to everyone else.
I bought the Nautical Almanac but it does not have such information.
It is very hard to find alternate sources of the data.
cheers,
Neville Michie
On 24/03/2014, at 11:06 AM, Paul wrote:
On Sun, Mar 23, 2014 at 7:02 PM, Neville Michie namic
-locked loop and alternately uses the sensors for transmitter
and receiver, swapping ends at about 74 Hz, to get a two way signal. This
method cancels most errors. It has temperature and velocity outputs.
cheers, Neville Michie
On 24/05/2014, at 11:16 AM, Mark Sims wrote:
I am building a weather
field on the mill.
cheers,
Neville Michie
I know you are talking about measuring lightning strikes but if you get the
impedance high enough, you can actually measure the earth's electric field.
(It is about 200V/m if I recall properly.) Interestingly it is affected by
the solar flux and solar
as magnitude.
cheers,
Neville Michie
On 27/06/2014, at 1:59 AM, Max Robinson wrote:
How fast does the maltese cross turn?
Regards.
Max. K 4 O DS.
Email: m...@maxsmusicplace.com
Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
for protection.
cheers,
Neville Michie
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Use a local solar cell and battery power supply.
If it is self contained it should not attract lightning.
Cheers,
Neville Michie
On 29/06/2014, at 1:13 PM, Hal Murray wrote:
namic...@gmail.com said:
Fibre optic would seem to be the answer for protection.
Assuming I use fibers
Hi,
it used to be called NSL, National Standards Laboratory, part of the CSIRO.
Now it appears to be called National Measurement Institute, (NSI)
and seems to be located mainly at Lindfield NSW.
http://www.measurement.gov.au/Pages/default.aspx
See if that works,
Cheers,
Neville Michie
On 29/06
drilled
into aluminium plate
edge wise to measure the plate temperature. You only have to do a few
experiments to find
that this is necessary.
cheers,
Neville Michie
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On 23/07/2014, at 5:11 AM, Attila Kinali wrote:
On Tue, 22 Jul 2014 01:17:03 +0100
Brian D gro...@planet3.freeuk.co.uk wrote:
Saturated steam at standard pressure will be exactly 212F, or 100C.
Stupid question: How to you ensure that the steam is saturated
water.
Admittedly a deep cellar made a good clock vault, but a thermistor, a computer
fan and
a 100 watt filament lamp in a wooden box can give far more accurate temperature
control.
cheers,
Neville Michie
On 23/07/2014, at 10:17 PM, Alexander Pummer wrote:
it does need a different design
they are also very efficient (99.9% +) electrically.
cheers,
Neville Michie
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months guarantee.
cheers,
Neville Michie
On 28/07/2014, at 1:59 PM, Chuck Harris wrote:
A small disagreement on a couple of points
Lead sulfate does not dissolve (in the normal battery chemistry),
and does not go all over the place. It forms at the lead and the
lead oxide plates, during
Hi,
I am interested in your new GPSDO.
How do I find out more about buying the kit?
Is this a USA only deal?
cheers,
Neville Michie
Sydney,
Australia
On 18/10/2014, at 9:35 AM, S. Jackson via time-nuts wrote:
LTE Lite GPSDO
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for double glazing, katharometers and generally all devices.
The suppression of turbulent heat transfer may provide more insulation but also
less noise and instability.
So it may be a good idea to use a relatively close fitting box with thick walls.
Cheers,
Neville Michie
On 23/11/2014, at 11:37 PM
. A
soldering iron fixed them very quickly.
The serial numbers were widely separated, so it was not an unlucky batch
problem.
cheers,
Neville Michie
On 16/11/2012, at 1:57 PM, Chris Howard wrote:
You all were right, my targeting of the 50 ohm resistor
across the oscillator output does not seem to have
I have found a pic of the dry joint,
this one was just a dry joint with resin insulating the connection,
the other never had any solder applied.
cheers, Neville Michie
On 17/11/2012, at 11:09 AM, Chris Howard wrote:
Maybe that is my problem. I definitely have a problem.
I am able
But does it have an output of Sidereal Time?
cheers,
Neville Michie
A Merry Season to all.
On 18/12/2012, at 11:02 AM, Mark Sims wrote:
BTW, Lady Heather has support for several versions of the Mayan and Aztec
calendars. Also Druid, Herbrew, Islamic, Indian, and many others
would show sidereal time!
It is now just a matter of watching the screen and listening to the ticks of
the clock.
thanks Mark, and the others,
cheers, Neville Michie
On 18/12/2012, at 2:33 PM, Mark Sims wrote:
Yes, you can have a GPSDMC (GPS disciplined Mayan calendar). You can also
to sidereal seconds, but
how do you synch.
the seconds? This is where the Lady helps. But I do not know how I can get
really accurate
seconds markers as convenient as the PPS from my Thunderbolt.
cheers,
Neville Michie
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lost?
I do not know how shipping located themselves.
cheers, Neville Michie
On 14/02/2010, at 5:36 PM, Robert Berg wrote:
I believe he's referring to the Fairchild A-10A bubble sextant,
originally produced in the 1940s. I used a periscopic sextant in
the KC-135, an improvement over the hand
by the LM317 output
would provide a low noise power source? What would be better?
cheers, Neville Michie
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and follow
to the hourglass you should at least use a caesium
standard to keep time while
this process occurs, you can then confidently correct the reversals
of the hourglass
for the turn-over dead time.
It should make for a simple timer,
cheers, Neville Michie
Just in case anyone finds a beryllium brick somewhere and tries to
use it:
Beryllium is very very poisonous.
cheers,
Neville Michie
On 11/03/2010, at 10:08 AM, Bruce Griffiths wrote:
p...@pseng.org.uk wrote:
Looking at the specific heat of metals:
http://www.engineeringtoolbox.com/specific
on isothermal surfaces)
Will this stop the radiant transfer and leave only the thermal
conduction of the plastic foam?
cheers, Neville Michie
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it impossible to solder.
It is worth keeping a tiny bottle of phosphoroic acid just for the
odd bit of resistance wire or thermo-couple.
You have to see it to believe it.
Cheers, Neville Michie
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pharmacy may be able to sell you some.
I hope that that helps,
Cheers, Neville Michie
On 22/03/2010, at 7:43 AM, paul swed wrote:
Were do you obtain a small amount of phosphoric acid
Also when I looked it up they said it was H3PO4. Doesn't sound like
the
same.
Is there a common use
of that plastic over your ground plane should work.
Or do plastics that attenuate enough not exist?
cheers, Neville Michie
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Warren,
there is a report somewhere of resetting the oven temp in a HP 10811
to exactly find the turnover temperature.
How high is this on your list of things to do to improve a HP 10811?
Does it make the double oven unnecessary?
cheers, Neville Michie
On 27/03/2010, at 10:49 AM, WarrenS
What about the HP 10811 running out of EFC range by ageing? It may
just be a matter of centring the EFC with the mechanical trim
adjustment.
Cheers, Neville Michie
On 29/03/2010, at 11:15 AM, Matthew Kaufman wrote:
Bob Camp wrote:
Hi
I would bet the OCXO is off frequency. Bad heater
likely values
increasing the temperature past maximum frequency, then the same
values decreasing the temperature.
An hour or so at each temperature. Then a least squares regression to
a parabola which
should show the best value.
cheers, Neville Michie
On 30/03/2010, at 9:49 AM, Mike S wrote
Volts of the
floating battery.
Another module has a low voltage disconnect circuit that disconnects
the battery when it runs down to 10.9 volts,
high enough that no cell is reverse charged.
I have only just switched it on tonight, it works but I have no
performance data yet.
cheers, Neville
Or you could rotate the whole OCXO on flexible leads through 180* and
let gravity tune your frequency.
The range might be small, but an occasional tweak on the frequency
control might be acceptible.
cheers, Neville Michie
On 03/05/2010, at 6:00 AM, Bob Camp wrote:
Hi
An R-390A
, and the fun starts all over again. It would be very easy to think
that the GPSDO was not talking.
cheers, Neville Michie
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Strange...
the link does not work here in Sydney,
but if you cut and paste the link into Google it works!!!???
cheers, Neville Michie
On 28/05/2010, at 4:59 PM, Steve Rooke wrote:
On 28 May 2010 07:42, Bruce Griffiths bruce.griffi...@xtra.co.nz
wrote:
Steve Rooke wrote:
On 28 May 2010
or later I get the COM port right with the right
settings and all is well.
There seem to be up to 3 layers to get right.
This may be because I use USB to serial converters or just be
inherent to the later Windows OS.
cheers, Neville Michie
On 17/07/2010, at 5:02 PM, Adam Feigin wrote:
After
with the signals delayed to be near
quadrature, and using the better data of the two.
I use a lower frequency version of this system to monitor clocks
(mechanical ones with pendulums).
Cheers, Neville Michie
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battery backup power required.
cheers, Neville Michie
On 26/07/2010, at 3:12 PM, Hal Murray wrote:
There is another way to compare two frequencies, relevant when
they are
very close together. I divide a reference down to 100KHz and use
it to clock
a phase detector made of a pair of D
the full scale time to account for large time jitter of
mechanical clocks so I set it up to divide at any of a wide range of
frequencies.
Cheers, Neville Michie
On 27/07/2010, at 3:12 AM, Max Robinson wrote:
Hal Murray wrote:
There is another way to compare two frequencies, relevant when
.
Has anyone set up an LPRO with a TBOLT?
How was it done? Was it successful?
cheers, Neville Michie
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to record a measurement. I then had to punch the
numbers from the printout onto IBM punch cards
to calculate the process being monitored.
We have come a long way since then.
cheers, Neville Michie
On 30/07/2010, at 11:52 PM, paul swed wrote:
So on a 60 khz signal the long strip chart recorder
.
That should give you + or - 10Volts.
You may also need a reference diode, say 2.5 volts, to provide an
offset voltage to the input of the amplifier
if you want to set the zero of the control range and possibly offset
a single ended DAC output
to span either side of zero.
cheers,
Neville Michie
will pull the pendulum into phaselock with a surprisingly
small amount of power.
In fact if you turn off the drive it would keep the pendulum swinging.
Cheers, Neville Michie
On 08/08/2010, at 6:00 PM, Steve Rooke wrote:
This is very interesting and I wonder if the capabilities of this
system being
some great new
materials, rare earth magnets and some great methods of construction.
I look forward to a clock that, compared to an atomic clock, is
really just an accurate gravity meter.
cheers, Neville Michie
On 10/08/2010, at 2:46 AM, Bob Holmstrom wrote:
Food for thought.
I find
Have a look at this clock.
Cheers, Neville Michie
http://www.wired.com/magazine/2010/07/pl_backstory_timemachine/
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anyone know how laser gyroscopes are developing?
cheers,
Neville Michie
On 26/08/2010, at 11:04 AM, David Smith wrote:
As a fair percentage of the discussion amongst the learned
gentlemen on this group involves GPS-based timing systems, I'd like
to ask a non-time related, but GPS-related
.
cheers, Neville Michie
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a
good solution.
cheers,
Neville Michie
On 03/09/2010, at 3:08 PM, Charles P. Steinmetz wrote:
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
12V regulator to its own ground
on the TBolt you should
be able to provide cleaner power to the unit and get lower noise on
its spectrum.
cheers, Neville Michie
On 11/09/2010, at 4:22 PM, Mark Spencer wrote:
Thanks that all makes sense and power up went ok.
- Original Message
repaired a 10811 today with the same problem.
Does anyone know the rated temperature for the fuse to drop out?
cheers, Neville Michie
On 15/09/2010, at 8:40 PM, Charles P. Steinmetz wrote:
After cooling and restarting the 5370B and observing its behavior,
we judged that it was more likely it had
, at
the end of the lamp life it goes low.
This is all from my memory, the detail is in the User's guide and
integration guidelines.
cheers, Neville Michie
On 16/09/2010, at 4:51 PM, d.sei...@comcast.net wrote:
I got one of the ebay LPRO-101s about 6 months ago and played with
it for a while
spent 24 hours thinking that the Tbolt was not responding before
communication was established. After that either Lady Heather or
Tboltmon
works very well.
cheers, Neville Michie
On 20/09/2010, at 10:00 AM, Mark J. Blair wrote:
On Sep 19, 2010, at 4:38 PM, Bob Camp wrote:
Lady Heather is a good
keep
their own time between contacts, and somewhere you would need heros
with primary standards to synch the whole system.
You would not be able to find a good position, because you would not
know the
propagation mode.
cheers, Neville Michie
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time
receiver still works, it will lock on
to the 2nd harmonic of a 100kHz signal from the divider driven by my
Tbolt.
cheers, Neville Michie
On 15/10/2010, at 8:10 AM, gandal...@aol.com wrote:
In a message dated 14/10/2010 20:46:15 GMT Daylight Time,
david.partri...@perdrix.co.uk writes:
OK
relationship to UTC, temperature and barometric pressure. I would
only need
a battery backup power supply for the TBolt.
cheers, Neville Michie
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,
and it is obvious that there
are so many micros abroad and none of them is going to be universally
useful for future tasks.
cheers, Neville Michie
On 07/07/2008, at 6:01 PM, Hal Murray wrote:
The GPS may drop out, so a disciplined oscillator is in order, but
how can you get the GPS signals
circuit left the
phantastron in a static condition until pulses arrived or the timeout
circuit reset and the scan from zero delay would start again.
Some elements of these ideas are still probably useful,
cheers, Neville Michie
On 13/07/2008, at 6:43 PM, Hal Murray wrote:
I found
From my thermionic valve days,
the emmissivity of a filament was greatly extended by under-running
them.
If the display is pemanently run at a lower current in dim mode,
how long could the life be extended by dropping the filament voltage
by a small margin?
cheers, Neville Michie
On 18/07
Hi,
surely an oven that controls to 1*C limits the inner xtal oven from
the outside 0 - 50*C,
so with a finite gain on the inner oven the oven the XTAL is
controlled 50 times as well?
Thats why they use double ovens.
cheers, Neville Michie
On 20/07/2008, at 1:40 PM, Rick Karlquist wrote
is to wind
two platinum wires on a P2O5 containing fibre glass pad, and
electrolyse any water absorbed to oxygen and hydrogen gas
after it is sealed.
Vacuum tube sealing and evacuation works well.
cheers, Neville MIchie
On 20/07/2008, at 8:54 PM, Mike S wrote:
At 01:17 AM 7/20/2008, Ed Palmer wrote
sensitivity of wool has a temperature consequence, and
latent heat and
heat of hydration are released as moisture is absorbed. This usually
only
adds to the thermal stability of the insulated item, which is why
wool is
comfortable to wear.
Just in case you were interested,
Neville Michie
on the electrical input while
I use the internal pot to adjust it centre scale or if it runs off
scale. That way I can get microhertz steps
of adjustment from an external circuit without an extreme stability DAC.
cheers, Neville Michie
On 26/07/2008, at 8:51 AM, jshank wrote:
Hi,
I recently acquired
.
just in case you were interested,
cheers, Neville Michie
On 29/07/2008, at 9:35 AM, Jim Lux wrote:
At 04:22 PM 7/28/2008, you wrote:
On Wed, 23 Jul 2008 15:22:08 -0700, Jim Lux
[EMAIL PROTECTED] wrote:
Based on the clocks I've taken apart, dividing the 10MHz down to
1 Hz
is probably
surprise in variable height data.
What would be interesting is a correlation between apparent height
error and night minimum
temperature at ground level (air temperature 2 metres from the ground).
cheers, Neville Michie
On 31/08/2008, at 6:15 AM, Mark Sims wrote:
Besides the wonky geoid
, Neville Michie
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,
Neville Michie
On 05/09/2008, at 7:30 AM, Murray Greenman wrote:
In the light of the latest posts on driving clocks from 1pps, it
sounds
as though I'd better rethink what I was planning!
I am in the middle of the design of a micro which uses a 10MHz crystal
to provide a digital clock
weeks to see if it drifts
in frequency.
cheers, Neville Michie
On 08/09/2008, at 2:59 PM, Jim Palfreyman wrote:
Yes I was really interested in that unit many years back and made
enquiries.
It all came to nothing. Hence my dive into time and frequency
standards to
learn to build my own
and started for each trace so as to be in phase with the synch pulse.
The CRO was probably 1950s vintage, I was using it in 1961 for
calibration of navigation radar.
The CRO tubes were very non-linear so graticule divisions were not
accurate enough.
cheers,
Neville Michie
_
time-nuts
is to get on with the building of the gear to measure
how well the LPRO now performs
at constant temperature.
Cheers,
Neville Michie
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comparing the phase of PPS from GPS stabilised systems
to the divided
10MHz from the LPRO over a period of days, weeks, months or years.
cheers, Neville Michie
On 11/09/2008, at 4:35 AM, Hal Murray wrote:
I have just commissioned a temperature control for my LPRO rubidium
oscillator.
The next
is a duct with fins that the tiny fan blows through
and by switching the fan I get
control much better than 0.1*C.
I am looking forward to measuring its performance in frequency
stability.
cheers, Neville Michie
On 11/09/2008, at 4:35 AM, WB6BNQ wrote:
Hi Neville,
In all seriousness, I thought
with a conventional serial port.
Now I vaguely remember talk about RS232 communications and the need
for pull up or down
resistors and supplies, but searching the archives I could find
nothing relevant.
Can anyone tell me how I could run the TBOLT off a USB/Serial converter?
cheers, Neville Michie
,
Neville Michie
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indicate UTC. Constructing a micro project is no problem,
but the program development and installation is a sticking point.
cheers, Neville Michie
On 06/10/2008, at 3:08 AM, Didier Juges wrote:
Tell me what kind of signal you need to drive your clock, and I may
be able
to get what you need from
very specific to
a project, but the pulse per minute overcomes a major part of the
problem of identifying which pulse is
which with the PPS at little cost to the project.
Neville Michie
On 06/10/2008, at 12:13 PM, Didier Juges wrote:
-Original Message-
From: [EMAIL PROTECTED
answers on Google but none that seemed good enough
to set your clock by.
By clock I just mean a rubidium clock that is harmonised to the GPS
system.
cheers, Neville Michie
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with sunset
at 6PM.
The old clocks had dials marked so that you read off the elastic
Italian hours.
cheers, Neville Michie
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time-nuts
and follow the instructions
they warned that the
metal was annealed and lost its properties if it was bent (work hardened
I assume). So just be careful to gently spring the case just enough
for the pips to
clear the locating holes.
The frequency of operation depends precisely on the magnetic field,
cheers, Neville MIchie
will improve the frequency accuracy
by a large ratio.
cheers, Neville Michie
On 23/10/2008, at 8:02 AM, iovane@@inwind..it wrote:
I would be very pleased to know when (date and time) anybody
out there happened to record jumps in frequency of crystals.
I have stable (e-07) tuning forks which
rate , and then after 3 - 6 months it will suddenly
jump to a new rate
as shown if Fig 8.1.
He goes on to say that this is part of a random walk process.
I hope that is of some help.
Neville MIchie
On 23/10/2008, at 9:34 AM, iovane@@inwind..it wrote:
Neville,
Hi Antonio,
precise pendulum
has little effect on the
output.
I guess that all the crystal does is to filter what must be a quite
noisy signal
from the atomic resonance. When I inspected the circuit board I could
not even find the crystal,
it is not in a grand crystal can.
cheers, Neville Michie
On 23/10/2008, at 9:42
gross thermal
cycling reduce ageing?
just some thoughts,
Neville mIchie
On 24/10/2008, at 3:25 PM, [EMAIL PROTECTED] wrote:
Hi Steve,
the jumps don't anneal themselves, they are permanent changes in
frequency.
The crystal is off-frequency after a jump. This has to be
compensated
hi Tom and Frank,
I am a member of NAWCC, and the Sydney Clockmakers Society.
cheers, Neville Michie
On 25/10/2008, at 6:59 AM, Thomas A. Frank wrote:
Hi Carl;
I am.
Tom Frank, KA2CDK
On Oct 24, 2008, at 9:57 AM, Carl Dreher wrote:
Hi,
Just wondered how many people on this list
the USB-serial converter.
I tried two different brands of USB-serial converters on my laptop
and both work perfectly well.
I hope this may help you,
Neville Michie
On 27/10/2008, at 4:44 AM, J. L. Trantham wrote:
I have developed a problem with one of the TBolt's that I got
through
Hi Antonio,
I have taken the cover off my LPRO but I could not see the lamp.
I guess it is in the smaller housing.
What does the lamp look like and how do you remove it?
I do not want to damage my unit.
cheers, Neville Michie
On 02/11/2008, at 9:06 PM, iovane@@inwind..it wrote:
Yuri
a low pass filter and this will
prevent short period
variances from being calculated.
cheers, Neville Michie
On 09/11/2008, at 8:43 AM, Alan Melia wrote:
This is an interesting thread again.it may be similar to ones
that have
been discussed, but one or two furthur questions occur to me. I
is taking me.
cheers, Neville Michie
On 10/11/2008, at 1:38 PM, Bruce Griffiths wrote:
Joe
J. L. Trantham wrote:
I have been enjoying this discussion.
Since the original question was the desire to 'compare' the
frequency of an
LPRO to a Z3801, it seems that you could consider that from two
not have found anything as useful in Australia at the price.
cheers, Neville Michie
On 27/11/2008, at 7:55 PM, Steve Rooke wrote:
Hmmm... International Traffic in Arms Regulations, well I don't like
to poke holes in that excuse but unless the US customs are REALLY
paranoid, I can't see how most
.
The big difficulty with temperature measurement is that you need
circulating thermostat
baths to immerse things in to compare temperatures to any accuracy.
You only need
one or two of those in your shack to have no room for your time
standards, voltage standards etc.
cheers, Neville Michie
unlike
volts and things
gravity is one variable that frequency/time can be used to define.
Although I dont think you will find a frequency/gravity transducer on
fleabay.
cheers, Neville Michie
On 03/12/2008, at 3:56 PM, Jim Palfreyman wrote:
2008/11/29 Mike S [EMAIL PROTECTED]
At 01:30 AM
to escape from earth's atmosphere to be lost for all time.
We should be doing all the research that needs helium now, because
we will not be able to do it in the future.
Every time my grand kids play with a helium balloon I feel guilty.
Neville mIchie
On 13/12/2008, at 9:15 AM, Lux, James P wrote
Hi,
does anyone know of a fast fourier transform module or subroutine
that could be run in XCEL ?
Or a small program that could process a data set in a PC.
It is a convenient way of handling data but I have not seen a FFT in
the box of tricks.
cheers, Neville Michie
Thanks all,
I had looked but did not see...
I have found the function in Excel,
now I will revise the subject with Bracewell
and try to use it.
Thanks, Neville Michie
On 21/12/2008, at 10:59 AM, iovane@@inwind..it wrote:
I've been using the Xcel built in FFT, and even under WinXP
and Newton
had thrown their discoveries in we called it modern times. Then
Einstein came along and we have time nuts.
cheers, Merry solstice, Neville Michie
On 21/12/2008, at 9:25 PM, Michael Sokolov wrote:
Bill Hawkins b...@iaxs.net wrote:
The passage grave at New Grange, Ireland, is one
Hi,
The LPRO manual has a circuit mistake on page 16.
The north end of R145 should go to +17V, not the resistor junction.
It may make a difference when interfacing the unit.
Seasons Greetings
Neville Michie
On 27/12/2008, at 12:06 PM, Didier wrote:
Go to http://www.ko4bb.com/cgi-bin/search.pl
to guns in USA.
Now I have had my say, lets get back to time-nut business.
cheers, Neville Michie
On 29/12/2008, at 7:03 PM, Poul-Henning Kamp wrote:
In message 4958746c.9040...@erols.com, Chuck Harris writes:
Jim Palfreyman wrote:
I suppose it's nuts is it to want to live in a society where
a precise, accurate, happy and very prosperous New Year,
Neville Michie
On 31/12/2008, at 6:00 PM, Magnus Danielson wrote:
Hi!
I don't have the equipment for it, but I am sure that a ham near would
be able to pull this off. Here the deal:
After seventy years of broadcasting Canada's
finish building some more gear I will get the improved
performance data,
cheers, Neville Michie
On 12/01/2009, at 6:07 PM, Michael Baker wrote:
Hello, Timenutters--
I only have experience with four different LPRO-101
units, but with respect to heatsinking, all 4 behaved
identically during my
I was once told that the white sticky paste put under power
transistors years ago as a heat conduction aid
was dangerous because it was based on berylium oxide
cheers, Neville Michie
___
time-nuts mailing list -- time-nuts@febo.com
trick also works here to remove DVM
offset.
I know this is not using the quartz thermometer directly but it would
be a very good way to measure a board to 1millikelvin.
For theoretical reasons a thermocouple can not have a temperature
offset.
cheers, Neville Michie
--- On Sat, 24/1/09, John
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