Brooke,
Looks like we came up with almost exactly the same ideas. Maybe there
is only one solution? You said accelerometer and tube sensor and
I said gravity sensor. I think both are really an accelerometer
with one bit resolution. You said and End Code, I said beep.
Pretty much the same
Which works very well, but unlike all of the English
thread combinations, you must keep the lathe's half-nuts
engaged to the lead screw ALWAYS. That means when you reach
the end of the thread, you must stop the lathe, and back
it up to the beginning of the thread to make the next cut.
With
Jim, you're right a DAC is not needed: I was thinking of generating the
BPSK by a DAC but it is not necessary. I have seen some BPSK hardware
modulators: easier than generating samples and feeding a DAC.
On Fri, Dec 16, 2011 at 7:42 PM, Hal Murray hmur...@megapathdsl.net wrote:
On 12/17/2011 02:37 PM, Azelio Boriani wrote:
Jim, you're right a DAC is not needed: I was thinking of generating the
BPSK by a DAC but it is not necessary. I have seen some BPSK hardware
modulators: easier than generating samples and feeding a DAC.
For a single bird a digital output could be
At 01:04 AM 12/17/2011, Neville Michie wrote...
This clock consists of 6 cubes, each has a digit display on one face.
It does not matter how you arrange them, if they are in a line they
will display the right time. (there may also be a nearby box
containing a Rb or GPS time standard.)
Wow.
Correct: I was thinking how to simulate an only bird. The RACAL GPS101 is a
single channel simulator and maybe made that way. Then it is possible to
place a number of 1 channel simulators at a distance...
On Sat, Dec 17, 2011 at 3:18 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On
On 12/17/11 6:58 AM, Azelio Boriani wrote:
Correct: I was thinking how to simulate an only bird. The RACAL GPS101 is a
single channel simulator and maybe made that way. Then it is possible to
place a number of 1 channel simulators at a distance...
I was thinking more along the lines of how
Hi Mike:
Yes, I thought that cube implied any face could be the face with the display.
The container that holds the single digit display could be a thin rectangle.
Your reading is more practical and makes the problem much easier and far lower
in cost.
Have Fun,
Brooke Clarke
On 12/16/11 10:04 PM, Neville Michie wrote:
At this time of the year many people look for frivolous puzzles to solve.
My puzzle is to design a clock.
This clock consists of 6 cubes, each has a digit display on one face.
It does not matter how you arrange them, if they are in a line they will
On Sat, Dec 17, 2011 at 4:48 AM, Chuck Harris cfhar...@erols.com wrote:
Which works very well, but unlike all of the English
thread combinations, you must keep the lathe's half-nuts
engaged to the lead screw ALWAYS. That means when you reach
the end of the thread, you must stop the lathe, and
On 12/17/2011 05:10 PM, Jim Lux wrote:
On 12/17/11 6:58 AM, Azelio Boriani wrote:
Correct: I was thinking how to simulate an only bird. The RACAL GPS101
is a
single channel simulator and maybe made that way. Then it is possible to
place a number of 1 channel simulators at a distance...
I
I suspect turret lathes are still used for shortish runs of some of the
simpler parts, like bushings and similar parts.
Not every shop looks like a NASA facility.
-John
==
On Sat, Dec 17, 2011 at 4:48 AM, Chuck Harris cfhar...@erols.com wrote:
Which works very well, but unlike
Chris,
You must be kidding! How old are you?
Lee K9WRU
- Original Message -
From: Chris Albertson albertson.ch...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Saturday, December 17, 2011 11:00 AM
Subject: Re: [time-nuts] metric /
Just read decimal seconds...
Now that's interesting. It would be like visiting another country that
uses a different temperature scale. After a while you'd be able to
relate the numbers to your own sense of temperature. Similarly, you'd
be able to relate the count of seconds to your sense of time
On 12/17/11 10:41 AM, Bill Hawkins wrote:
Just read decimal seconds...
Now that's interesting. It would be like visiting another country that
uses a different temperature scale. After a while you'd be able to
relate the numbers to your own sense of temperature. Similarly, you'd
be able to
On 12/17/11 9:01 AM, Magnus Danielson wrote:
On 12/17/2011 05:10 PM, Jim Lux wrote:
On 12/17/11 6:58 AM, Azelio Boriani wrote:
Correct: I was thinking how to simulate an only bird. The RACAL GPS101
is a
single channel simulator and maybe made that way. Then it is possible to
place a number of
On 12/17/2011 11:10 AM, Jim Lux wrote:
On 12/17/11 6:58 AM, Azelio Boriani wrote:
Correct: I was thinking how to simulate an only bird. The RACAL
GPS101 is a
single channel simulator and maybe made that way. Then it is possible to
place a number of 1 channel simulators at a distance...
I
On 12/17/2011 09:57 PM, Jim Lux wrote:
L1 C/A
But the real question isn't how to generate the signals (that's straight
forward).. it's how good does the oscillator have to be to effectively
test the receiver, in the sense of measuring it's timing performance.
A decent OCXO should be able to
On 12/16/2011 2:31 PM, gandal...@aol.com wrote:
Hi David
It's part of the resolution settings, whereby you alter the number of
displayed digits using the up down arrows, holding the up arrow for over two
seconds will shift the display left and increase the gate time so you
effectively get a 10
On 12/17/11 2:56 PM, Magnus Danielson wrote:
On 12/17/2011 09:57 PM, Jim Lux wrote:
L1 C/A
But the real question isn't how to generate the signals (that's straight
forward).. it's how good does the oscillator have to be to effectively
test the receiver, in the sense of measuring it's timing
On 12/17/11 9:14 AM, J. Forster wrote:
I suspect turret lathes are still used for shortish runs of some of the
simpler parts, like bushings and similar parts.
Not every shop looks like a NASA facility.
Oddly, NASA facilities aren't necessarily the most modern or sophisticated.
It takes an
Hi Jim,
On 12/18/2011 01:25 AM, Jim Lux wrote:
On 12/17/11 2:56 PM, Magnus Danielson wrote:
On 12/17/2011 09:57 PM, Jim Lux wrote:
L1 C/A
But the real question isn't how to generate the signals (that's straight
forward).. it's how good does the oscillator have to be to effectively
test the
Hi Magnus:
Exactly. The main problem with the Transit system was that the receiver needed a Cs clock for the system to work at
all. GPS removed that requirement.
It's my understanding that a GPS receiver that uses a Cs clock has much more
capability.
Have Fun,
Brooke Clarke
The manual machines are still in use for limited production runs,
such as are used in prototype manufacture.
Screw machines, and second op lathes see extensive use in
manufacturing because they are quicker than CNC machines...
that and very cheap to use.
I use manual machines because it is
Hi Brooke,
On 12/18/2011 03:30 AM, Brooke Clarke wrote:
Hi Magnus:
Exactly. The main problem with the Transit system was that the receiver
needed a Cs clock for the system to work at all. GPS removed that
requirement.
Indeed. Most of that was due to the long observations times as I recall
jim...@earthlink.net said:
But the real question isn't how to generate the signals (that's straight
forward).. it's how good does the oscillator have to be to effectively
test the receiver, in the sense of measuring it's timing performance.
My 2 cents, which could be way off...
One of the
You might want to consider the possibility that there is a whole world of
manufacturing that does not deal with millions of a single item. And
prototypes are not part of the process. When a product life might extend
over ten years and you can expect to get orders for two or three per year
Maybe they used a Cs standard for the original experimental units, but
the first commercial Transit unit I saw (Magnavox MX700?) just had a
big OCXO in it - it was also all controlled by a HP2100 computer and
output the fix data onto a teletype.
The MX1102/1107 (which were pretty much standard
It turns out that I unfairly maligned the 1992 (and the 9462
oscillator, option 04E) when I accused it of poor oscillator
settability. I was inspired by the recent discussions to have
another crack at mine, and they can, in fact, be set very
accurately. One of mine has been reading
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