could be wrong.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
kb8tq
Sent: Friday, May 18, 2018 9:46 PM
Hi
There are a number of papers out and about about the limits on OCXO
performance.
The bottom line is that coming up with a high
Well, how about the frequency drift between a pendulum, a tuning fork,
and a crystal.
Atomic standards could be added depending on availability.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal
Murray
Sent: Thursday, May 10, 2018 11:56
Um, time dilation by altitude if you have access to a mile high change.
Or subjective time dilation when a person is prevented from doing a task
on time.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal
Murray
Sent: Thursday, May 10
times more accurate than that for 1000 grams.
Hope I haven't strayed too far off topic, and wasted my time.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Richard
(Rick) Karlquist
Sent: Sunday, April 22, 2018 4:11 PM
To: Discussion
of hard science fiction.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Dana
Whitlow
Sent: Friday, April 13, 2018 8:39 AM
To: Tom Van Baak; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Pulsars, clocks
.
All in all, another fine learning experience. Sold the 103 and 113 after
a few years, and got into telephone GPS with a pair of HP Z3801A and a
16 foot plastic pipe mast for two HP conical antennas. Ended with the
Lucent stuff. Inquiries for recycling Lucent stuff welcome.
Bill Hawkins
bill.i
caused by
solid state power supplies and by tap changing by the power companies to
match loads to minimize transmission losses. I've considered using a
mechanical synchronous motor and slotted wheel to eliminate noise near
the zero crossing, but now that I am 80, I don't give a darn, you see.
Bill
that helps,
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of David
G. McGaw
Sent: Thursday, March 08, 2018 11:01 PM
Subject: Re: [time-nuts] Frequency deviations in Europe affect clocks
Can someone please explain why not paying your bills
when it shouldn't.
So I withdraw my comment about aluminum electrolytics, which was made
without a timenuts perspective.
Determining maximum error currents and offsets is simply a matter of
mathematics, which is left as an exercise for the student.
Regards,
Bill Hawkins
Corby
A time constant is calculated from R and C.
If 50 milliseconds is the correct number, R for 5 mfd is 10,000 ohms.
You could use an aluminum electrolytic for the capacitor.
Can you tell us where the 50 ms number came from?
Regards,
Bill Hawkins
-Original Message-
From: time
Learned tonight that J. P. Morgan got his start by buying 25 K defective
rifles for %3.50 each and selling them to the Army for $25 each. You
have no reason to trust a listing.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
kb8tq
Sent
Thank you, Charles.
What a clever way to minimize the power dissipation in Q4 with the
components of the day.
A switching regulator without the steep (and noisy) transients of
today's switchers.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com
Charles,
What does the unijunction 2N2646 do in the oven controller?
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles
Steinmetz
Sent: Monday, January 08, 2018 7:50 AM
Also, note that the HP schematics of the 10544 have some
Doubleday
books. I seem to have inherited some of those genes. But I can't tell a
bad equation from a good one, and my French ended in High School.
Happy new year to the best list on the Internet.
Bill Hawkins
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WWV.
OTOH, NTP has marvelous mathematical tricks to reduce Internet
propagation delay.
A scheme to reduce varying atmospheric delay would be useful, if there
weren't much better ways to get a standard frequency.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun
.
If this sounds like I know what I'm saying, you may be disappointed.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tim
Shoppa
Sent: Tuesday, November 14, 2017 9:53 PM
To: Discussion of precise time and frequency measurement
Subject: Re
Sadly, it is not the phone users who will benefit. It is the advertisers
who use your location to send targeted ads.
Time marches on.
Bill Hawkins
-Original Message-
From: Mark Sims
Sent: Wednesday, September 27, 2017 6:54 AM
Broadcom has released a phone chip that supports L5
Shouldn't that be 8 data bits?
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Richard
Solomon
Sent: Saturday, September 09, 2017 4:24 PM
I downloaded and installed Z38XX, configured both the Port and Device to
the recommended parameters
My HP conical antennas had N connectors, so I used 50 feet of RG-8.
Z3801 receivers never had a problem.
RG-8 is a sturdy cable, which may be the primary consideration for a 38
foot drop unsupported through the mast.
Don't have any comparison to lighter cable, though.
Bill Hawkins
declining years -
not for resale.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Jeremy
Nichols
Sent: Wednesday, August 09, 2017 8:12 PM
Definitely spendy. Is the 115 as noisy as the 113 (similar but w/analog
clock)? Wonder what *les douanes
/?utm_source=Naked+Security+-+Sophos+List
_campaign=f2c7691392-naked%252Bsecurity_medium=email_term=0_
31623bb782-f2c7691392-455148921
My apologies for the long link. You could try Googling the subject if
the link is broken up by your mailer.
Bill Hawkins
ut
Epoch + 1.5B seconds = 07/13/17 21:40:00
%
And if they haven't noticed, it might be a good time to point it out.
End copy of note
Some of us are impressed by long strings of zeros, so here I am,
pointing it out.
Bill Hawkins
___
time-nuts mailing lis
ap seconds, either.
Tried to find him, but only found a 2013 ad for a time keeper to
maintain 1000 clocks in various castles.
Hope that wasn't too far off topic.
Bill Hawkins
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To unsubscribe, go to https://ww
have the same
work to do as if the fuse had blown. If it starts bright and dims, you
may be forming electrolytics.
If the bulb maintains the same brightness, try a bigger bulb - or
disconnect the ovens.
You definitely need to read the part about running the ion pump.
Bill Hawkins
Disclaimer: I
, but it is
well built. Have moved to an old folks home and found other projects to
keep me occupied. Make me an offer that might motivate me to pack and
ship it, with the data I collected.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark
with it.
This is no criticism of Mark Sim's work. It tells you all you ought to
know. I just have trouble assimilating it.
Good luck.
Bill Hawkins
-Original Message-
From: Frank Howell
Sent: Monday, May 22, 2017 4:05 PM
Hi Folks,
Great list...I'm learning a lot. Could I trouble you for suggested
readings
FWIW, that looks like aviation equipment (gov't or civil), with a
locking connector.
That stuff is designed for minimum size and weight. You might find the
inside of the box quite cramped.
Buying aviation parts is even more expensive than buying boat parts.
Bill Hawkins
-Original Message
, that is something you do not choose to reveal.
Bill Hawkins
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and follow the instructions there.
Labs could have used a common gas heater for the crystal ovens, with a
bit of rewiring.
No fire hazard there - you've got a chimney. Also, flame safety is well
developed for gas heaters.
Would have required throttling gas flow control.
Bill Hawkins
Another possibility is circulating hot water
the amplifying device.
Sometimes that is reason the units were for sale.
Hope I'm wrong.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave
Wood
Sent: Saturday, April 22, 2017 8:43 PM
Anyone on the list own the above Time Code Readesr. I have
0 in "2001: A Space Odyssey."
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
kb8tq
Sent: Sunday, April 09, 2017 1:34 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] TAPR TICC boxed (i
at wrist temperature
and 1/3 at bedroom temperature, which varies with the seasons.
Would a ceramic capacitor crafted for a certain temperature coefficient
work? Can the fork have a crafted tempco?
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf
of minimum activity also minimized the cost of making that
adjustment. Sorry, I have no recent data, but it sure feels lonely to be
up at 4:30 AM.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Jeremy
Nichols
Sent: Wednesday, April 05, 2017
cycles per second. They count cycles instead of measuring
the
frequency. You can count cycles with a synchronous clock.
This becomes less tidy when DC tie lines are used, because inverters
have
to be adjusted to get the correct power flow.
Hope I got most of that right.
Bill Hawkins
Before you go looking for flaws in space, read the comments to the
sciencemag article at the link.
Thomas Lee Elifritz is informative.
It's amazing what you can do with math if you make a few simplifying
assumptions.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts
reduce the Q, but only while the fork was touching the
contacts.
When the battery is switched off, amplitude would decay until the
contacts were no longer touched.
Then you'd get over a minute for it to stop.
At least, that's how it looks to this mechanical engineer.
Bill Hawkins
-Original
for setting the weights at the end of the
fork tines?
Best regards,
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Morris
Odell
Sent: Thursday, March 16, 2017 4:23 AM
To: time-nuts@febo.com
Subject: [time-nuts] Antique precision timing
they named the town for someplace warm.
Let me know if you are seriously considering this, and I will find a
contact for you.
Bill Hawkins
-Original Message-----
From: Bill Hawkins [mailto:bill.i...@pobox.com]
Sent: Tuesday, February 21, 2017 8:08 PM
Neutrinos? Look up the OPERA
Wisconsin
but are not noticed there, AFAIK.
Bill Hawkins (Resident of Minnesota, but not a physicist, just a BSME)
-Original Message-
From: Bob Stewart
Sent: Tuesday, February 21, 2017 1:48 PM
Hi,
Have you been in touch with Fermi-Lab? They run a neutrino experiment
with a receiver
Well, if it was not working when you acquired it, the physics package
had probably reached the end of its life.
If it had been working recently and is not now, it might be repairable.
Others on this list know more about repairing than I.
Bill Hawkins
-Original Message-
From: David
is an adventure, but it's best to check the
pipermail/time-nuts archive for previous work.
Good fortune on your quest for knowledge.
Bill Hawkins
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.
Digi-key has ZNI devices as surface mount parts. Sparse data said
nothing about a platinum curve.
I'm curious because my former employer did very well selling platinum
RTD sensors, usually 100 ohms at the triple point.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts
stuff.
There are environments where time sync with Wi-Fi hasn't got a chance.
Jim Lux was looking for a COTS solution to time sync, and this might
work in a controlled environment.
Don't even think about consumer radio clocks that sync from unknown
Wi-Fi environments.
Bill Hawkins (John Hawkins son
uld know
more about its capabilities.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Martin
VE3OAT
Sent: Saturday, January 07, 2017 3:40 PM
To: time-nuts@febo.com
Subject: [time-nuts] Lavoie WWV Frequency Comparator available
I have a Lav
Wonder if these cases could be used on social media to create enough
fear that there would be a market for AC crowbars capable of blowing
line/pole transformer HV fuses? There's a few hits with Google, mostly
for DC crowbars. Too bad relays are so slow.
Bill Hawkins
-Original Message
, son" as Foghorn Leghorn would say.
Happy Holidays,
Bill Hawkins
-Original Message-
From: Nick Sayer via time-nuts
Sent: Monday, December 26, 2016 9:41 PM
It has 7 seg LEDs for hour, minute, second and tenth of a second
___
time-nuts ma
Bill Hawkins
-Original Message-
* Divider circuits need to be manually started using internal switches
[snip] Similarly the motor must be manually started.
"These clocks are not a lot of fun to live with. They sing along quite
loudly at
Please see http://support.ntp.org/bin/view/Main/SecurityNotice
or Google "NTP security"
But perhaps you meant to create a local NTP network with no connection
to the Internet.
In that case, SNTP is sufficient for wall clocks.
Bill Hawkins
-Original Message-
From: time-nuts [m
Well, they cancel if they're at the same temperature.
Bill Hawkins
-Original Message-
From: Mike Millen
Sent: Friday, November 11, 2016 12:28 AM
It would work as well if you used a pair of regular copper wires to
connect the meter to the thermocouple...
The junctions created by all
ssue was raised here. As a designer of industrial control systems, I've
made it a point to study security, and found Schneier to be a fount of
information.
Perhaps a disclaimer is in order. I do not know Schneier and receive
nothing from plugging his work.
Bill Hawkins
_
this is because there are no satellites broadcasting voltage
standards.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Perry
Sandeen via time-nuts
Sent: Wednesday, November 09, 2016 6:26 PM
List,
Fair Radio which has been in the surplus electronics
So what are the odds that the failed cap would be C13?
Is this cause for triskaidekaphobia? ;-)
Please pardon this random excursion outside the bounds of precision
time.
Bill Hawkins
(who learned not to let kakorraphiophobia lead me to osphresiolagnia
[bad odors, not erotic
I wonder how GPS is doing.
Thanks for any comments.
Bill Hawkins
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and follow the instructions there.
to determine the attainable precision, but I live in
an old folks apartment now. Let us know how it turns out.
Bill Hawkins
I know you wanted a COTS solution, but I think this is what you need for
1 degree control. You can't do it with on/off control
- as time goes by.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark
Sims
Sent: Friday, October 28, 2016 10:26 PM
To: time-nuts@febo.com
Subject: [time-nuts] What would be the proper equipment and procedure?
I don't know if it the proper way
wish to reach.
Best regards,
Bill Hawkins
P.S. I was afflicted with the desire for accuracy down to the Caesium
standard level. Hydrogen masers remained beyond my means. Now I live in
an apartment in an old folks community, which required severe
downsizing. The return on investment was negative
in a valley.
Let us know how this turns out, starting from an initial survey.
Bill Hawkins
-Original Message-
From: Joseph Gray
Sent: Sunday, October 16, 2016 11:20 PM
I'm curious to know how accurately a GPSDO will keep its 10 MHz output
while moving. No initial survey to set a position
What kind of capacitor is used for the 10 µF cap - electrolytic or film?
Bill Hawkins
-Original Message-
From: Nick Sayer via time-nuts
Sent: Monday, September 26, 2016 11:18 PM
With a short TC loop filter, the PLL does lock up, but obviously the
jitter of the Venus 10 MHz output
who want
to maximize eyeballs by going as low as they can and still find people
who can change a TV channel.
Be glad to discuss this with anyone off the list.
And now, back to precision time.
Bill Hawkins
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serial streams, like PicoScope.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
Camp
Sent: Wednesday, September 14, 2016 6:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent RFTFm-II-XO
Hi
Fake connections? Isn't a redundant system supposed to allow one box to
be disconnected?
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
Camp
Sent: Monday, September 05, 2016 8:20 PM
To: Discussion of precise time and frequency
in the eighties, the phase variation was only about 6 seconds
during a day and zero from day to day.
This is my understanding of the system. People with more knowledge,
please correct my misconceptions.
Bill Hawkins
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time-nuts mailing list -- time-nuts
neon-colored seven
segment arrays a bit taller than those in the GC-1006.
No doubt, there are many schemes for disciplining 60 (or 50) Hz
oscillators with 1 PPS.
TIA for any helpful comments.
Bill Hawkins
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the grounds.
Regards,
Bill Hawkins
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and follow the instructions there.
regulator.
Make of it what you will.
Bill Hawkins
-Original Message-
From: Alex Pummer
Sent: Sunday, July 24, 2016 7:29 PM
That is interesting, since the Sola device has a to the line frequency
tuned tank circuit in it, thus the output should not have to many higher
harmonics and should
in the message, the box goes into
"flywheel" mode (aka holdover).
The oscillators are undisciplined, wasting all of that GPS info.
An external PPS signal, if you could couple it in, would be ignored
because the micro won't even try to use it.
Bill Hawkins
Note: I can't reprogram micros with un
frequency - 4 poles at half. 1750 is for a 4 pole motor.
And so on ...
Bill Hawkins
-Original Message-
From: Hal Murray
Sent: Tuesday, July 12, 2016 7:24 PM
Most of the medium sized motors run at slightly below line rate, and
often at half of line rate. I'm thinking of the classic squirrel
, and it's accuracy is a better match for
human precision.
Could you give us a link to a picture of your solid walnut Nixie clock?
Got any more walnut?
Bill Hawkins
-Original Message-
From: John Swenson
Sent: Sunday, July 10, 2016 10:55 PM
I'm thinking about converting a Nixie clock I built
Hi Morris,
The idea of the author of "A Brief History of Time" telling the time
briefly has a certain appeal.
Can you share some construction details? Even a parts list would be
useful.
Thanks,
Bill Hawkins
-Original Message-
From: Morris Odell
Sent: Wednesday, July 06, 20
solution is
calculated from too many satellites.
That's what it looks like to me, anyway.
Bill Hawkins
-Original Message-
From: Steve
Sent: Saturday, June 25, 2016 9:08 AM
The phrase "over-determined clock solution" is used in the Trimble
Thunderbolt user manual in describing
The problem is editing out all of the redundant material. It's tedious
by hand.
Anyone got a program to do that? Say, in perl . . .
Bill Hawkins
-Original Message-
From: John Ackermann N8UR
Sent: Friday, June 24, 2016 1:36 PM
You know, this thread has had a tremendous amount
PPS that has enough
volts/degree to provide a useful error signal to the motor controller.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bernd
Neubig
Sent: Sunday, May 22, 2016 12:41 PM
To: 'Discussion of precise time and frequency
a significant fraction of a second per year; it's
the principle of the thing.
:-)
Bill Hawkins
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Note that the 3450B has an accuracy of 10E-5.
You're probably looking for something a lot better than that.
Bill Hawkins
-Original Message-
From: David
Sent: Friday, May 13, 2016 8:28 PM
On Fri, 13 May 2016 11:38:06 -0500, you wrote:
>David wrote:
>> I was thinking o
to
some value of minutes per day or other counts per period of time.
I've never really looked at Allan Deviation, but it seems to be a
statistical method for displaying variations in accuracy with time.
Perhaps ADEV is what you need.
Regards,
Bill Hawkins
-Original Message-
From: time-nuts
.
The science fair folks got enough interesting data without all that, but
the precision is not known.
The link didn't have any reference to code at all.
This is a way of looking at frequency variations with natural causes
that does not require expensive equipment, if done right.
Bill Hawkins
, that is.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Jay
Grizzard
Sent: Wednesday, April 06, 2016 8:22 PM
To: time-nuts@febo.com
Subject: [time-nuts] Building a mains frequency monitor
Since it seems to be a week for new projects
that is not
possible for volts, amps, and ohms. It's exciting stuff, and
correspondingly difficult.
FWIW
Bill Hawkins
-Original Message-
From: Alexander Pummer
Sent: Monday, April 04, 2016 4:49 PM
Building it cost you time and money, most likely much more than to buy,
but you gain
oscillators for the short time
constant accuracy that is not available from Rubidium.
Good fortune.
Bill Hawkins
-Original Message-
From: Nicolas Braud-Santoni
Sent: Sunday, April 03, 2016 5:04 PM
To: time-nuts@febo.com
Subject: [time-nuts] Advise on building a DIY GPSDO?
Hi,
I've been slowly
with industrial process control systems, anyone who
needed reliability used redundancy, and hoped that the fail-over
software would work. When safety was a concern triple redundancy was
used with 2 of 3 voting for output values.
FWIW
Bill Hawkins
-Original Message-
From: Rob Sherwood.
Sent
.
It may be that the triple point of water does not have the certainty to
reach '0.0001C'
Disclaimer: I only worked with industrial sensors from Rosemount, Inc.
as an employee.
Bill Hawkins
-Original Message-
From: Alan Ambrose
Sent: Friday, March 11, 2016 11:42 AM
Hi,
I hope this is still
that with a 10 CPS bandwidth filter. A mechanical servo tuned
the heterodyne oscillator to hold 100 KC. It was a marvel of technology
at the time. Didn't use the Knights filter, though. Possibly the
heaviest converter Collins built. Had 44 tubes.
Had one once, but time passes.
Bill Hawkins
-Original
If it were possible for time nuts to measure time differences to 10E-21,
could they have seen the effects of the gravity wave?
Bill Hawkins
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the
universe - well, not if mass and energy are conserved. Or did the wave
contain all of the radiated energy?
Disclaimer: My field of study was not physics.
Bill Hawkins
-Original Message-
From: Bob Stewart
Sent: Saturday, February 13, 2016 2:35 PM
Hi Tom,
Thanks for posting this. I'm
And on the top left, a fan-fold paper printer for the data.
Imagine handling all of that data manually instead of getting it in a
disk file.
Bill Hawkins
-Original Message-
From: Jeremy Nichols
Sent: Saturday, January 30, 2016 12:43 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts
most of
us know what happens when the boss doesn't know what the techs are
doing. In my experience, you don't get good designs if you don't know
how they are built. But then, there are people who think the Universe is
based on mathematics rather than the other way around.
Bill Hawkins
P.S. My thanks
requests, it goes to the best
impoverished experimenter story.
Please reply directly to b...@iaxs.net, not the list.
It's been fun.
Bill Hawkins
P.S. Also have a 3335A parts unit and an Efratom FRK L rubidium pulled
from a Collins Omega navigation set, oh, and a set of the older Lucent
RFTG XO
.
I don't know of any mechanical clocks that sync once a day. IIRC,
Western Union had to send people to advance or retard the hour hand when
daylight savings time became common.
There is something about those clocks that makes a time nut want to
restore one.
Bill Hawkins
-Original Message
accept that amount of time travel, follow this link:
http://www.hactrn.net/sra/vaxen.html
or Google "vaxen immortal power"
The reference to October 19, 1987, is to the first computer failure to
have a major effect on the stock market.
Enjoy, as they say
Bi
ack directly to the line. This allowed the UPS
to be replaced when its warranty ran out. Batteries lasted six years,
did not invest another $500 in them.
Good luck.
Bill Hawkins
-Original Message-
From: Chris Waldrup
Sent: Saturday, October 10, 2015 8:20 AM
To: TIme Nuts
Subject: [time-nuts]
are free from discipline and are now drifting.
So yes, the positioning aspects matter.
Disclaimer: I haven't studied RAIM (or TRAIM) enough to know exactly
what goes on, but that's the behavior I've observed.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com
The role of the diode is to break the current path to the cap
when S1 shorts the current to ground when PPS 2 occurs.
With the diode, S1 does not short the cap to ground.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Alex
Pummer
Sent
with proportional terms such as
PID do a better job with a linear error signal, unless the thing being
controlled (crystal frequency) is so nonlinear that the integral term
does most of the work.
Wish I could do the experiment, but no longer have a lab.
Bill Hawkins
-Original Message-
From: time-nuts
, please ask for clarification. Or
do a schematic and ask for corrections.
Bill Hawkins
P.S. This will not work well for small differences between PPS 1 and 2.
It will work if the goal is 50% difference, or 90 degrees phase shift.
-Original Message-
From: Can Altineller
Sent: Wednesday
on.
This is a lot of analog circuitry, but it will operate as fast as the
parts are capable of switching and not at the whim of whatever the micro
is doing.
Hope that's useful. Probably already been done.
Bill Hawkins
-Original Message-
From: Magnus Danielson
Sent: Tuesday, September 22, 2015
) in a USPS large Fixed Rate
Priority Mail box for $18.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
Benward
Sent: Saturday, September 05, 2015 1:19 PM
To: Time Nuts
Subject: [time-nuts] Z380XA The saga of the aging 10811
Hi All,
I would
time, or
adjusting by an hour for summer or winter time, then our needs for
social time can be satisfied.
I don't see the need to yank the oscillator around for social time with
a time loop.
Best regards,
Bill Hawkins
P.S. We're moving to a life care community that has no room for a time
lab
with a
28 volt
3 amp supply into a mini-rack using aluminum angle. My time lab is being
downsized due to a move to senior living apartments. There's other
stuff.
Bill Hawkins
Bloomington, MN 55438
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
Camp
Sent
.
That would soon have the clocks synchronized out of phase, provided the
mounting arrangement did not absorb too much of the pulse energy.
The situation is similar to synchronizing a TV vertical oscillator
(running a bit slow) with the received sync pulse from the broadcast
station, no?
Bill Hawkins
/real_time_system_conditions.html
His chart (with permission) is at:
http://home.earthlink.net/~schultdw/power/all.png
In this case, the time reference was given by the power company. No
cycles were counted.
Regards,
Bill Hawkins
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