:12 PM
Subject: [time-nuts] I think I've become a Volt nut too.
Hi All,
I have been a time nut for some time now. I think I've become a Volt nut
too! I build the Silicon Chip magazine Voltage reference late last year
but
didn't have anything to compare it against so I bought a Fluke 732A DC
measurement'
time-nuts@febo.com
Subject: [time-nuts] I think I've become a Volt nut too.
Hi All,
I have been a time nut for some time now. I think I've become a Volt nut
too! I build the Silicon Chip magazine Voltage reference late last year
but
didn't have anything to compare it against so I
Sure Chuck. What I was talking about was a part of statistics
that we in our gnat-hair-splitting compulsive group may forget
about.
Let's assume that our 100,000 standards were carefully
calibrated against THE standard. There is a small amount of
error in the calibration process. Let us
It is possible for 100k secondary standards average to be skewed if they were
calibrated to the same primary standard. All the primary standards would have
to different for the secondary average to be an real average.
Coin toss analogy would be slightly different if the coins were all different
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Subject: [time-nuts] I think I've become a Volt nut too.
Hi All,
I have been a time nut for some time now. I think I've become a Volt nut
too! I build the Silicon Chip magazine Voltage reference late last year
but
didn't have
, Dick, W1KSZ
-Original Message-
From: Roy Phillips phill...@btinternet.com
Sent: Jan 12, 2010 3:19 AM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] I think I've become a Volt nut too.
Hi Nick
Is it possible to let us have
a...@comcast.net said:
It is not impossible that for a sample of 100,000 secondary
standards, that the errors would be all be off in the same direction,
compared to the standard's value.
Now, granted, this would be a small probability indeed. But it is
possible to toss a coin fifty times
Hi All,
I have been a time nut for some time now. I think I've become a Volt nut
too! I build the Silicon Chip magazine Voltage reference late last year but
didn't have anything to compare it against so I bought a Fluke 732A DC
reference standard.
I there a group I can subscribe to that
Roy,
The standard is based on the Analog Devices AD588 chip.
http://www.analog.com/static/imported-files/data_sheets/AD588.pdf
You can buy the magazine article at
http://siliconchip.com.au/cms/A_111365/article.html
Regards,
Nic
Hi Nick
Is it possible to let us have the schematic/details of this
I'm picturing 100,000 pendula in a cave, all gravity locked to
their neighbors. (How small would they have to be to fit into
the main cave at Carlsbad Caverns, New Mexico?)
So, how much would the temperature gradient have to be to break
the lock?
Ah, maybe it isn't gravity, but the common floor
Hmmm... gravity locking. I wonder if you could actually power a torsion
pendulum that way?
-John
==
I'm picturing 100,000 pendula in a cave, all gravity locked to
their neighbors. (How small would they have to be to fit into
the main cave at Carlsbad Caverns, New Mexico?)
Wow thats a nice chip indeed
On Tue, Jan 12, 2010 at 2:58 PM, Nic McLean mcle...@bigpond.com wrote:
Roy,
The standard is based on the Analog Devices AD588 chip.
http://www.analog.com/static/imported-files/data_sheets/AD588.pdf
You can buy the magazine article at
True, but there is always a probability that they all happen to
be off one way.
Quite a small probability, but not impossible.
Sorry for the disturbing thought.
In the case of the 732A, and the early 732B, this is in fact the case!
Fluke mentioned, that all the 732A and the early
b...@iaxs.net said:
I'm picturing 100,000 pendula in a cave, all gravity locked to their
neighbors. (How small would they have to be to fit into the main cave
at Carlsbad Caverns, New Mexico?)
Wikipedia says:
Big Room or The Hall of the Giants
The largest chamber in Carlsbad Caverns, with
Were you guys around (about a year back, I think) when this reference
was mentioned?
http://www.voltagestandard.com/
Seems like excellent price/performance to me. I see he has a more
accurate, more expensive model too.
paul swed wrote:
Wow thats a nice chip indeed
On Tue, Jan 12, 2010 at
Bill Hawkins wrote:
I'm picturing 100,000 pendula in a cave, all gravity locked to
their neighbors. (How small would they have to be to fit into
the main cave at Carlsbad Caverns, New Mexico?)
Gravity-lock? Wouldn't just the ordinary sound-waves be sufficient?
With a pendulum there will be
Hi
For open box pendulums, the air swishing around in the cave should be very
effective at locking every single one of them up.
For something like a vacuum enclosed clock you would need lock modes that are a
bit more crazy.
Bob
On Jan 12, 2010, at 5:53 PM, Magnus Danielson wrote:
Bill
Mike Naruta AA8K wrote:
Sure Chuck. What I was talking about was a part of statistics that we
in our gnat-hair-splitting compulsive group may forget about.
Let's assume that our 100,000 standards were carefully calibrated
against THE standard. There is a small amount of error in the
Hal Murray wrote:
a...@comcast.net said:
It is not impossible that for a sample of 100,000 secondary
standards, that the errors would be all be off in the same direction,
compared to the standard's value.
Now, granted, this would be a small probability indeed. But it is
possible to toss a
Ah, but a man with 14 standards can use statistics!
Sorry.
Bill Hawkins
-Original Message-
From: Nic McLean
Sent: Monday, January 11, 2010 9:12 PM
Can I coin the phrase; A man that has one DC Voltage standard knows how
accurate his meter is, whereas a man with two standards is not
Ah, but it is possible that all 14 could be off in the same
direction.
Sorry.
Bill Hawkins wrote:
Ah, but a man with 14 standards can use statistics!
Sorry.
Bill Hawkins
-Original Message-
From: Nic McLean
Sent: Monday, January 11, 2010 9:12 PM
Can I coin the phrase; A man that
@febo.com
Subject: Re: [time-nuts] I think I've become a Volt nut too.
Ah, but it is possible that all 14 could be off in the same
direction.
Sorry.
Bill Hawkins wrote:
Ah, but a man with 14 standards can use statistics!
Sorry.
Bill Hawkins
-Original Message-
From: Nic McLean
side =)
Sent via BlackBerry by ATT
-Original Message-
From: Mike Naruta AA8K a...@comcast.net
Date: Mon, 11 Jan 2010 22:24:30
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Subject: Re: [time-nuts] I think I've become a Volt nut too.
Ah, but it is possible
Date: Mon, 11 Jan 2010 22:24:30
To: Discussion of precise time and frequency
measurementtime-nuts@febo.com
Subject: Re: [time-nuts] I think I've become a Volt nut too.
Ah, but it is possible that all 14 could be off in the same
direction.
Sorry.
Bill Hawkins wrote:
Ah, but a man with 14
At 10:26 PM 1/11/2010, john.fo...@gmail.com wrote...
But if you had 1000 references, or maybe 100,000, the law of large
numbers would be on your side =)
Unfortunately, Murphy's Law always wins.
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To
But if you had 1000 references, or maybe 100,000, the law of
large numbers would be on your side =)
a...@comcast.net said:
True, but there is always a probability that they all happen to be
off one way.
Quite a small probability, but not impossible.
I'm not so sure it's small.
think I've become a Volt nut too.
Hi All,
I have been a time nut for some time now. I think I've become a Volt nut
too! I build the Silicon Chip magazine Voltage reference late last year but
didn't have anything to compare it against so I bought a Fluke 732A DC
reference standard.
I
@febo.com
Subject: Re: [time-nuts] I think I've become a Volt nut too.
Ah, but it is possible that all 14 could be off in the same
direction.
Sorry.
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