Maybe not exactly, but I use an app on an old Android cell phone as my UTC wall
clock. Large characters in horizontal mode; NTP via WiFi.
Sent from BlueMail
On Jun 14, 2018, 20:15, at 20:15, David Andersen
wrote:
>I'd hoped that ebay or aliexpress would yield a bounty given how
The mountain thing has been done.
Someone needs to take their
clock to the bottom of the deepest mine (2.4 miles).
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and
I have used the Prologix USB GPIB device with mine.
On 1/22/2015 6:14 AM, christophena...@virgilio.it wrote:
Hello everybody,
i am looking for an interface pc card for a Racal-Dana Model 1992 Nanosecond
Universal Counter Timer 1.3 GHz.Please could someone give me some suggestions
about a
If you had an exact timing for the outage, would that
have told you the beam-width of your antenna?
-- project for next spring :-)
On 10/9/2014 1:04 PM, Mike Feher wrote:
Bob -
I do not believe it has any effect. The DirecTV satellites are geostationary
at about 22K miles. I used to
Southward (toward equator) deflection would actually improve
the geometry. All non-north vectors would
be lengthened in proportion.
On 11/21/2013 6:37 PM, Bill Beam wrote:
On Thu, 21 Nov 2013 15:28:32 -0800, Chris Albertson wrote:
If you need a very tall pole that is 100% vertical then
I have a Systron Donner 6153 counter
which has burnt out diodes on the fast
channel.
The display board has a big edge connector which
looks like it accesses all of the nixie and power
lines.
I am going to disassemble to make a nixie clock.
I may saw the display board in half in order to trim
it
There was a GPS antenna project in QST OCT 2006.
(but I never built one)
BTW: if you want to build your own GPS antenna, the easiest designs
are
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You all talking about putting oscillators into counters...
I took the oscillator out of a derelict 5328A and used it
in my GPSDO.
I have the little adapter board, part # 05328-60018 which
I will send to anyone who wants it and will pay the shipping.
Chris
w0ep
Item has been claimed.
Chris Howard ch...@elfpen.com wrote:
You all talking about putting oscillators into counters...
I took the oscillator out of a derelict 5328A and used it
in my GPSDO.
I have the little adapter board, part # 05328-60018 which
I will send to anyone who wants
On 7/25/2013 8:32 PM, paul swed wrote:
Well lucks not so good do have the voltage closer but as Bob C said. That
ain't the issue.
this may is a dumb question:
Lower than expected frequency means some extra capacitance in parallel
or not enough in series with the crystal... ?
Would that put
On 7/15/2013 10:09 AM, Bob Stewart wrote:
In this case, I was using the 10MHz output from the GPSDO as the reference
and measuring the 5MHz output from the GPSDO. So, even if the GPSDO is off
in frequency, the relationship between the 10MHz reference and the 5MHz
signal are mathematically
what you are using for the F, M, and S
parameters. What kind of receiver are you driving yours with, and do you
have it in position hold mode?
Bob
From: Chris Howard ch...@elfpen.com
To: Bob Stewart b...@evoria.net
Sent: Friday, July 12, 2013 6
On 6/19/2013 1:52 PM, Gabs Ricalde wrote:
Are you using the original BeagleBone or the new BeagleBone Black?
Will you have any details available about what parts are needed to set it up?
Thanks!
Chris Howard
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I like that explanation. I think I get it.
I don't think it is likely to cause me any worry.
My actual measurement of ADEV on my VE2ZAZ device
gave me a 100,000s sigma of just under 1E-10
and that works for me (best is at 1000s, 4E-11).
Maybe the strength and the danger of the VE2ZAZ
design
I'm with Bob in that I don't really understand this description.
And what are we trying to be in phase with? the 1PPS?
Is it possible to reproduce the actual phase of the
clock in the GPS birds once it has been through my GPS
and come out as 1PPS?
I picture the EFC steering the car straight
The online obit at
http://www.santafefuneraloption.com/sitemaker/sites/santaf0/obit.cgi?user=949646Shera
says,
Memorials may be made to the University of Chicago Laboratory Schools,
the Sierra Club, or any organization of the Donor’s choice.
University of Chicago Laboratory Schools
My very-limited experience in releasing code was
being very excited when I heard from someone that
they had found a bug.
That's the only communication I've ever received.
It's hard to know whether to be happy (no bugs!)
or sad (no users!).
Chris Howard
Looks like an @ROAD iLM2700
http://www.smb.road.com/corp/shared/pdf/SpecSheet_iLm2700_25Oct06.pdf
On 3/5/2013 9:57 AM, Pete Lancashire wrote:
I did not get any, I will see if any are still there and get them,
once I do I'll let the list know how many etc.
and send what there is out at
I've decided to list my FTS-4060 on ebay, item# 151004036331
No reserve, 10 days.
Notices tacked on the local telephone poles just have not
resulted in much interest.
Chris
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I have the USB/GPIB Prologix thingy also.
My Racal 1992 on talk mode just sends the
readings down the wire. I can collect them
with regular serial port work on the PC side.
I don't really understand GPIB or talk mode.
But the readings show up on my serial port.
Chris
On 2/25/2013 10:44 AM,
would like to sell the FTS-4060 and
use the money to buy a better HF radio, and get back to the
part of my hobby activities I enjoy more. No offense, but
time-nuts stuff sure takes a long time.
Chris Howard
W0EP
Columbus, Mississippi
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Any advice on troubleshooting the D channel
of a Systron 6153 counter?
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than X hours will
only be measuring the fine properties of the oscillator
and not the whole system. The question is, how many
hours of data collection are needed to capture a
characterization of the GPSDO as a whole?
What do people to with Thunderbolts and other similar systems?
Chris Howard
w0ep
On 1/12/2013 7:40 AM, Magnus Danielson wrote:
At 250 ps you use interpolators. The typical coarse counter would be 100 MHz
and that means 10 ns in raw resolution, but you would then use an
interpolator to get higher resolution. By getting a start and stop measure,
roughly tau time
The manual states that loosing the settings on a 6680 is no big problem ,
but on the 6681 you loose the interpolator calibtation. And it sounds
like that's not a good thing.
I didn't know you had to watch out for Battery on a PM6680/81.
CFO - Tnut-Beginner
Denmark
Would loss of
On 12/29/2012 8:28 PM, Adrian wrote:
Chris,
patience is the key to successfully trimming your Cs unit.
You will really want to compare it to your GPS for a week or so.
You might be surprised about your findings.
Actually, you're in need of a third high performance source...
how else can
Today I arrived home from a trip to Cleveland
to pick up my FTS-4060 Cesium standard.
About 45 minutes after power-up the lock
light came on.
This is unit S/N 1253. I think the only
option it has is the 1 MHz/100 kHz output.
I connected both my GPSDO and this thing to
my O-scope and can see
On 12/29/2012 7:17 PM, Magnus Danielson wrote:
I would recommend to use a TIC and TimeLab to assist you on that task.
It is recommended to look at the phase plot (P), frequency plot (F) and
modified Allan deviation plot (M) every once in a while.
A benefit is naturally that you can share
Surplus FTC-4060 which needs collecting in the next 10 days.
ch...@elfpen.com
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On 12/20/2012 11:48 AM, Bill Dailey wrote:
fts or ftc
FTS-4060 (you're right)
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On 12/20/2012 11:35 AM, Chris Howard wrote:
Surplus FTC-4060 which needs collecting in the next 10 days.
Sorry, this is causing more trouble than I was expecting.
I will be more clear.
I bought a surplus FTS-4060. The thing sits in Cleveland
and I have 10 days to secure it.
I'm looking
If it were me, I'd suspect that my window of bits is off
to the left or right by one bit. The old first bit is
called zero problem.
And the relationship between 7- 3 and 5- 1 makes me
wonder.
Chris
On 12/10/2012 5:00 AM, Tom Harris wrote:
I am logging the data from this strange master
I just want to say thanks to all who participate on this list.
You guys are way above my batting average and I learn a lot
just by hanging around.
Thanks for being patient with newbies and dummies.
p.s. my GPSDO (the VE2ZAZ design and board) is running
great thanks to advice from you all.
It's been running a few days now and everything
looks good. I usually fail on the side of optimism,
but hope things continue.
Thanks very much to the group for patience and support.
Chris Howard
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The picture, if attached, did not come through.
Probably it was stripped off by the mailing list software.
I did located what I believe you were speaking of.
A small white donut placed in the circuit board which
was an attachment point for the trimmer and a smaller
fixed capacitor and the blue
Maybe that is my problem. I definitely have a problem.
I am able to get the EFC to work on some occasions.
Usually it will work if I run the trimmer all the way
out and toggle the power. I can then adjust the trimmer
and get things working. But if I give the box a rap
the frequency jumps and
You all were right, my targeting of the 50 ohm resistor
across the oscillator output does not seem to have solved the
problem. A good thing to do, probably, but not the answer.
While I was all excited about the resistor change I also
mapped out the control voltage (EFC) vs frequency change.
I
On 11/15/2012 3:49 PM, Charles P. Steinmetz wrote:
.90 VDC 9,999,999.90
How and where are you measuring the EFC voltage? Are you sure the
voltage on the EFC pin of the 10811 (Pin 6) was the same as you measured?
Was the EFC return pin (Pin 5) connected to the oscillator supply return
My perpetually drifting 10811 pretty quickly made it to the negative
voltage rail on the control voltage.
I was looking at the oscillator output with an O-scope and it looked
pretty nasty. My equipment is not so hot, so I first chalked that
up to bad probes. But I did some google work on that
of behavior an indication of dire problems
with my 10811 oscillator?
Chris Howard
w0ep
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has move approximately 1 volt.
That fits within your 0.05 volts per day.
Thanks to everyone. Lots of interesting and helpful information.
Chris Howard
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I don't see what the problem is
with HOA's and antenna restrictions.
I just put a mag-mount antenna on the car
that's up on blocks in the driveway.
( a bit of Mississippi humor for your Friday afternoon :-) )
peace!
Chris
Columbus, MS
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Yes, I have done so.
You need a level converter.
And the DSPMon software from the trimble web site
is very informative.
The Resolution T manual is also available on that web site.
Chris
On 8/6/2012 11:57 AM, Miguel Barbosa Gonçalves wrote:
Hi!
I'm looking at the Resolution T from Trimble
From the URL you had given, just find the Support tab
and you will have the manual and the software.
On 8/6/2012 2:00 PM, Chris Howard wrote:
Yes, I have done so.
You need a level converter.
And the DSPMon software from the trimble web site
is very informative.
The Resolution T manual
On 5/17/2012 2:24 AM, Ken Kubick wrote:
Does anyone have or know where I can find the pinouts for a Trimble Resolution
T Timing GPS module 12ns 1pps?
Thankyou
I have a Resolution T User Guide PDF file which has that
info. I found it on the Trimble web site. If you cannot
find it, I can
On 5/17/2012 2:24 AM, Ken Kubick wrote:
Does anyone have or know where I can find the pinouts for a Trimble Resolution
T Timing GPS module 12ns 1pps?
Thankyou
I have a Resolution T User Guide PDF file which has that
info. I found it on the Trimble web site. If you cannot
find it, I can
These pretty ADEV/Tau plots, do people have an automated
system to produce these things? How much work is involved?
How many samples are taken? Sample for a month, omputer crunching
for weeks?
I have no feel for what the process is like.
I have two oscillators and a Racal 1992 counter. If
On 10/8/2011 10:43 AM, Roy Phillips wrote:
Chuck
If you failed to get the Racal - don't worry, the HP is a better
product without all that aggravation that comes with doubts about the
front panel buttons that frequently fail, and the symbols that wear
off. The HP 5334A or B are a better bet,
On 9/23/2011 3:23 PM, Brooke Clarke wrote:
Hi again:
What is the speed of light in rock?
Outside of a cave the answer is C.
Inside a cave, it's too dark to read my watch.
(With apologies to Grocho Marx)
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Seems like a lot of unknowns. You would have to
have sensors monitoring the sensors.
Do you lose too much by just maintaining a lifetime worst-case number, or
maybe some kind of probability function?
On 9/23/2011 3:45 PM, Poul-Henning Kamp wrote:
And then it gets nasty:
Vehicle
I'm building a GPSDO using the VE2ZAZ board, an HP 10811 oscillator and
a Trimble Resolution T GPS.
My goal is a simple and cheap 10 Mhz standard for my little home
electronics bench and ham shack.
I have my power supply parts finally gathered up, now I have these
boards that need
On 9/21/2011 4:08 PM, Bob Camp wrote:
Hi
Twisted pair is fine for the EFC. Shielded twisted pair (one end
grounded on
the shield) might be slightly better). A lot depends on how many yards
long
the EFC wire is :)
Bob
Thanks!
Would it do any good to have the control board, GPS, or
I just had a phone conversation with someone who said she was a reporter
for the NY Post
about the comment I put in at the FCC regarding the Lightsquared report.
I told her I heard about the issue at time-nuts.
Chris
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FAA has some stuff for sale in Atlantic City, NJ on the GSA auction
website,
including a Loran-C generator which is still at 0 bids and $10.
Just FYI.
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http://www.nationalgrid.com/uk/Electricity/Data/Realtime/Frequency/Freq60.htm
There's a beautiful screensaver available at
http://gridwise.pnl.gov/technologies/
which shows the US WECC ( or so it seems ).
Chris
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On 12/30/2010 4:58 PM, Anthony G. Atkielski wrote:
There's a beautiful screensaver available at
http://gridwise.pnl.gov/technologies/
which shows the US WECC ( or so it seems ).
I tried running the monitor program (not the screen saver), and it says
that I have no Internet connection available.
What is the current requirement for the 10811 EFC +/- 5Vdc ?
Is there any advantage to having it served by batteries?
Chris
w0ep
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found in an old pile of stuff:
Hammarlund TM700-A Secondary Frequency Standard
Operating Instructions
7 pages and a cover letter.
Free, if anyone wants it.
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1) Your own LORAN?
2) MASERS!
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Radar calibration:
You could do a clock calibration if you knew some fixed reference
points to
sweep.
Put some towers up on a few of the taller peaks in the area. Measure
them
while the GPS is running and use them for reference to keep the clocks
right when GPS is down.
But masers sound
Given the quality of vacuum the manual seems to imply, I'm guessing this
wont cut it. I'll bet that even low impurity Teflon has a long bakeout
period.
Too bad they don't have some kind of getter to allow lower vacuum specs.
I expect they thought of that.
The thing does sound like a
http://news.stanford.edu/news/2010/august/sun-082310.html
It's a mystery that presented itself unexpectedly: The radioactive
decay of some elements sitting quietly in laboratories on Earth seemed
to be influenced by activities inside the sun, 93 million miles away.
Any implication for CS
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