On 08/20/2017 10:50 AM, Poul-Henning Kamp wrote:
In message
Hi,
On 08/19/2017 09:04 PM, Ole Petter Ronningen wrote:
Hello
I just stumbled across this:
https://www.muquans.com/index.php/products/mclock
A commercially available cold atom rubidium clock! My apologies if this has
already been reported on the list.
When we saw it in their booth during
In message
It hasn't been discussed before that I can recall.
But its a cold RB clock and though it stable its still a secondary
reference.
Bob your right its interesting that the sales locations are in China and
India. Perhaps a larger opportunity for a RB reference today.
Regards
Paul
WB8TSL
On Sat, Aug
Hi
Located just outside Bordeaux ….. ROAD TRIP
I don’t think there’s been much mentioned about them before. It’s interesting
that their
main sales thrust so far seems to be China and India.
Bob
> On Aug 19, 2017, at 3:04 PM, Ole Petter Ronningen
> wrote:
>
>
> Hi Jim,
>
> first of all verify all the capacitors installed. Refer to:
>
> http://www.timeok.it/wp/wp-content/uploads/2015/09/First-aid-when-you-buy-a
> n-hp5065A-v-1.2.pdf[1]
>
> Luciano
>
> On Mon 07/12/15 05:30 , "Jim/Anna McIntyre" wrote:
>
> > Greetings all,
> > My name is
Well, no breakthroughs to report. I started by looking at A8 (the Phase
Detector/274 Hz oscillator). It seems to be OK, but has no 137 Hz error
signal coming in from the A7 amplifier. The A7 amp seems OK, at least it
passes the 'Quick Check' mentioned in the service manual. (That consists of
Jim
Yes the A7 is sensitive. I actually injected 137 and 274 into it and as I
recall the signal was very small to get large readings. Sorry do not recall
the level.
So if the tail ends working then it gets tricky because the possibility is
the RF side of the puzzle. I have no idea what equipment
t;paulsw...@gmail.com>
To: Discussion of precise time and frequency measurement <time-nuts@febo.com>
Subject: Re: [time-nuts] (no subject)
Date: Mon, 7 Dec 2015 08:29:42 -0500
Jim
Welcome to time-nuts and you were indeed lucky to get a 5065.
Lots of possible items.
But the fact that the last line a
Jim/Anna,
I took the liberty of adding 'HP 5065A' to the subject line to help others.
Sounds like a nice 'find'. There are many experts here regarding the 5065A.
I'm a 'novice'.
There are several manuals on the net. You can find one manual here:
Jim
Welcome to time-nuts and you were indeed lucky to get a 5065.
Lots of possible items.
But the fact that the last line are all 0 may mean its as simple as the
loop selector being open and not closed. Normally the control would tend to
drift all the way over. On reset it goes all the way left
Hello Jim,
Could you point me to this list of test equipment unloaded by the DOD
contractor, please? Thank you.
Regards,
Miao
On Sunday, December 6, 2015 9:00 PM, Jim/Anna McIntyre
wrote:
Greetings all,
My name is Jim, I'm a Noob to your list. A local DoD
Thanks for adding the subject in. I'm not used to this format, and
forgot...
Sadly, no clock. It does have a battery, and luckily it hasn't leaked.
I've already received a few emails with some tips, and will post an update
soon.
Thanks again,
Jim
On Mon, Dec 7, 2015 at 9:26 AM, J. L.
In message <1530394039.1439027.1441348869239.javamail.ya...@mail.yahoo.com>, Pe
rry Sandeen writes:
>OK, but why? The temperature would be stable so the resistorsand
>reference diode wouldn't drift.
No, the temperature is not stable, not even close.
Given that the TL431 is quite good
Are you sure? Perry was proposing to use a TL431 to
make an oven, using its famous temperature sensitivity,
and inside the oven would be another TL431 that acted
as a voltage reference.
Every oven I have ever seen that is temperature controlled
has a part that is quite good at measuring
:18:15 -0500
From: Bob Camp kb...@n1k.org
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Questions regarding tuning Thunderbolt with
LadyHeather -- GPSDO's
Message-ID: 6581eb02-9792-432f-b143-25b41fb29...@n1k.org
Content
In message b260783a-8a00-4053-b2e5-e2462746d...@gmail.com, Didier Juges write
s:
Without a D term, PI loops can be unstable when the gain (P) is
increased. If you will, with a large error, the correction will
itself be large and as the system corrects itself, it may overshoot
the target
KD5SSJ
ARRL Technical Specialist
Message: 10
Date: Sat, 24 Jan 2015 09:18:15 -0500
From: Bob Camp kb...@n1k.org
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Questions regarding tuning Thunderbolt with
LadyHeather
Cash,
Typically a PLL loop uses a PI loop-filter, making it a PI-control
system with a steered integrator in the form of the oscillator. Many
other control systems prefer to use the PID controller, and Bob found
that there is a D factor in there.
The factors at hand is:
P = Proportinal
I =
It looks to me to be another implementation of the NIST chip-scale
atomic clock. Their description includes electronic circuit, photo
detector, and light source on chip.
David
On 5/9/13 7:54 PM, Bob Camp wrote:
Hi
It also says 10 ppb / day stability. Lots of specs that don't add up. Sort
Yes, that's true, Simon, but remember the initial goals of simplicity
and long term phase coherence, while jitter doesn't matter so much. The
longer term average frequency ratio should be right on, while comparing
at any particular cycles it would be awful.
Ed
On 01/08/2013 09:08 AM, M. Simon wrote:
To reduce cycle to cycle jitter I think a divide by 10 is in order (/5, /2).
And if you can arrange it the MCU should be a little slow.
The cycle jitter doesn't change in time-amplitude by division, it's just
the jitter relative to the period which
Hi
(no subject) is such a nice topic to index things under
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Tuesday, January 08, 2013 2:57 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] (no subject
Hi
Well then you would want at least an Rb as a holdover source just in case ….
Bob
On May 18, 2012, at 9:31 PM, Mark Sims wrote:
No, actually it is for my alarm clock. Ignore the sawtooth? Poppycock!
What self-respecting time nut could possibly tolerate being woken up with a
+/-
I like Less than $20... Not for Sale Sounds like vaporcrap to me...
-
Or 216 channels (GPS L1/L2/L2C/L5; GLONASS L1/L2; Galileo E1/E5A):
http://www.javad.com/jgnss/products/triumph.html
Have used Delta receivers in production at a former employment. They are
very
100 Khz is s/9 in Cape May, NJ.
73,
Bill, WA2DVU
Cape May,NJ
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: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bill Riches
Sent: Monday, March 19, 2012 9:08 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] (no subject)
100 Khz is s/9 in Cape May, NJ.
73,
Bill, WA2DVU
Cape May,NJ
Yes, never used but no doubt about the power of IDA. My opinion is: you
don't need the power of IDA for an MCS51 executable code.
On Fri, Feb 17, 2012 at 11:43 AM, Elio Corbolante elio...@gmail.com wrote:
Azelio Boriani wrote:
In my opinion you don't need the power of an IDA-class disassembler
Potentially dangerous URL
From: time-nuts-boun...@febo.com [time-nuts-boun...@febo.com] On Behalf Of
Robert Atkinson [robert8...@yahoo.co.uk]
Sent: Thursday, September 01, 2011 10:29 AM
To: gree...@ntlworld.com; mur...@cts.com; greenw...@matchtech.com;
-engineering.co.uk rol...@snell-engineering.co.uk;
birdtheb...@btinternet.com birdtheb...@btinternet.com; u...@gmail.com
u...@gmail.com
Sent: Thursday, September 1, 2011 6:35 PM
Subject: Re: [time-nuts] (no subject)
Potentially dangerous URL
From: time-nuts-boun
Hi
The TBolt OCXO does have good noise characteristics. Unfortunately you have to
pull it out of the unit to figure that out.
Bob
On Aug 19, 2010, at 10:31 PM, Mark J. Blair n...@nf6x.net wrote:
On Aug 19, 2010, at 7:13 PM, Bob Camp wrote:
Hopefully they will keep GPS running long
On Aug 20, 2010, at 5:07 AM, Bob Camp wrote:
The TBolt OCXO does have good noise characteristics. Unfortunately you have
to pull it out of the unit to figure that out.
Is its phase noise substantially worse when it's in the unit? I.e., is the rest
of the TBolt adding a lot of phase noise to
Hi
It's not that the TBolt is noisy, it's that good phase noise is a whole lot of
db down. If you look at the posted plots, there is a lot of digital crud in
them even with a good supply. The TBolt innards are the most likely source.
Bob
On Aug 20, 2010, at 1:00 PM, Mark J. Blair
Hi Mark,
Sure they're good but other than it's a really cool and stable oscillator
why is everyone bothering with these when you can get a decent LPRO
Rubidium for the same or less . It at lest ten times more stable than
the HP oven job. I just bought 5 good LPROs on Ebay for about
Hi
Simple answer - they self calibrate to 1x10^-13 at a one day time period.
Essentially zero long term drift.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark2
Sent: Thursday, August 19, 2010 4:49 PM
To: time-nuts@febo.com
Bob Camp wrote:
Hi
Simple answer - they self calibrate to 1x10^-13 at a one day time period.
Essentially zero long term drift.
Bob
Have I missed something? A self calibrating cheap Rb unit? a self
calibrating 10811? I really must wake up :^)
dr
-Original Message-
From:
@febo.com
Sent: Thu, August 19, 2010 4:56:41 PM
Subject: Re: [time-nuts] (no subject)
Bob Camp wrote:
Hi
Simple answer - they self calibrate to 1x10^-13 at a one day time period.
Essentially zero long term drift.
Bob
Have I missed something? A self calibrating cheap Rb unit? a self
Subject: Re: [time-nuts] (no subject)
My crystal ball indicates the comparison is used Lpro and used Tbolt,
original
poster wanted to know why expend $100 for Tbolt when Lpro is cheaper.
Stanley
From: Dan Rae dan...@verizon.net
To: Discussion of precise time
On Aug 19, 2010, at 4:54 PM, Bob Camp wrote:
Yup, the original question was why a TBolt?
I just joined time-nuts today, so please forgive me if I'm beating a dead
horse. For me, the answer to why a TBolt was it automatically calibrates
itself against somebody else's well-maintained cesium
measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] (no subject)
On Aug 19, 2010, at 4:54 PM, Bob Camp wrote:
Yup, the original question was why a TBolt?
I just joined time-nuts today, so please forgive
On Aug 19, 2010, at 6:42 PM, Didier Juges wrote:
Well, you need another reference that does not use the same principles to
check your first reference against.
That one worked for me.
Ooooh, good one!
Now I am working on the next one, because a man with two clocks...
...needs a third
and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] (no subject)
On Aug 19, 2010, at 4:54 PM, Bob Camp wrote:
Yup, the original question was why a TBolt?
I just joined time-nuts today, so
On Aug 19, 2010, at 7:13 PM, Bob Camp wrote:
Hopefully they will keep GPS running long enough for me to find something to
compare it to.
My new GPSDO leaves me with the question of how do I measure the phase noise
of what is by far the best oscillator I own... without buying a better one to
Hi All,
Thanks very much. I'm printing it out as we speak. It looks like a great
scanning job.
Thanks,
-John
=
Fellow nuts
I just placed the ops manual for the tracor 527E on
the www.to-way.com Web site. It is under the Time-Nuts Info tab.
Thanks to Luciano P. S.
I have all this stuff. I really don't want to open this thing up, and my
oscillator trouble shooting skills are not that great.
I think you have several choices:
1) Double check all the pins going into the hockey-puck. (Maybe something on
the board has died/broke.)
2)
to do (if the price is right)
Bob
- Original Message -
From: Steve Rooke
To: Discussion of precise time and frequency measurement
Sent: Sunday, June 20, 2010 1:03 AM
Subject: Re: [time-nuts] (no subject)
Well, if your not prepared to open it up to fix it yourself, are you
Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Robert Benward
Sent: Sunday, June 20, 2010 8:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] (no subject)
Steve,
I was looking for insight. For instance
of precise time and frequency measurement
Sent: Sunday, June 20, 2010 1:03 AM
Subject: Re: [time-nuts] (no subject)
Well, if your not prepared to open it up to fix it yourself, are you
looking for someone else to fix it for you (your postings need
clarifying)?
Steve
On 20 June
, are available for E1938
Bob
- Original Message -
From: J. L. Trantham
To: 'Discussion of precise time and frequency measurement'
Sent: Sunday, June 20, 2010 11:06 AM
Subject: Re: [time-nuts] (no subject)
Bob,
I do not know about the E1938A but I have repaired 10811's utilizing
that is the
cause of destroying your expensive OCXO's.
Cheers,
Steve
Bob
- Original Message -
From: Steve Rooke
To: Discussion of precise time and frequency measurement
Sent: Sunday, June 20, 2010 1:03 AM
Subject: Re: [time-nuts] (no subject)
Well, if your not prepared to open
Bob,
guess you know that detailed documentaion is available here:
http://www.prc68.com/I/HPE1938.shtml
http://www.leapsecond.com/museum/e1938a/
Open the can and report back!
Adrian
Robert Benward schrieb:
All,
Anybody out there know how to fix an E1938 oscillator? Something in the
metal can
Subject: Re: [time-nuts] (no subject)
Bob,
guess you know that detailed documentaion is available here:
http://www.prc68.com/I/HPE1938.shtml
http://www.leapsecond.com/museum/e1938a/
Open the can and report back!
Adrian
Robert Benward schrieb:
All,
Anybody out there know how
, and my
oscillator trouble shooting skills are not that great.
Bob
- Original Message -
From: Adrian
To: Discussion of precise time and frequency measurement
Sent: Saturday, June 19, 2010 11:10 PM
Subject: Re: [time-nuts] (no subject)
Bob,
guess you know that detailed
Bob,
On 24 May 2010 03:40, Robert Benward rbenw...@verizon.net wrote:
Hi All,
Does anyone have a manual for this Z3805A? Schematics?
If you find one, I'd certainly be interested. What I do have is some
pdfs on the Furuno GT80 receiver which is used in the device. These
were kindly sent me by
Hi Rex,
On 25 May 2010 08:32, Rex r...@sonic.net wrote:
Steve,
If the Furuno pdf's , you have, are more than just the sales fluff, I'd
suggest you upload the files to Didier's web pages
http://www.ko4bb.com/cgi-bin/manuals.pl?dir=05%29_GPS_Timing
That page has an upload link in the
Caveat: I've never worked with a 3805. I do have a 380. I'm assuming they
are close.
If the gps hasn't been turned on in a while, it will need to download a new
ephemeris. With the new ephemeris, it can find it position much faster
because it will know pretty close where the satellites
Hi
I think if you do a search for z3801a programs, you will find several programs
that will also work on the 3805
Bob
On May 21, 2010, at 9:15 PM, Robert Benward wrote:
Hi,
I just purchased a Z3805A at the Dayton hamfest this past weekend. How do I
get it to work? Do I need software to
Lady Heather is free and a good start.(Just do a google search)
Nic
VK2KXN / VK5ZAT
Hi,
I just purchased a Z3805A at the Dayton hamfest this past weekend. How do I
get it to work? Do I need software to run this, or can it run stand alone.
I have turned it on, but only the power light comes
Hi
I thought that LH was a TBolt only sort of thing.
A few things you will find on the 3805:
There is a lot of stuff that says it's RS-422. Most seem to be set up for
RS-232.
Some say that there are telcom outputs (E1/T1). If so they are pretty well
hidden.
The front panel comes off
Robert Benward wrote:
Hi,
I just purchased a Z3805A at the Dayton hamfest this past weekend. How do I
get it to work? Do I need software to run this, or can it run stand alone.
I have turned it on, but only the power light comes on, the GPS lock, and
more importantly, the enable light is
Sorry about the empty post -- hit the send key by accident.
Ulrich's free Z38XX program works great as a monitor for the Z3805. He
added some stuff to specifically support differences from a Z3801. The
Z3801 programs can be used but can't support the extra satellites the
3805 can track.
Rex wrote:
Sorry about the empty post -- hit the send key by accident.
Ulrich's free Z38XX program works great as a monitor for the Z3805. He
added some stuff to specifically support differences from a Z3801. The
Z3801 programs can be used but can't support the extra satellites the
3805 can
. Thanks again, I will keep you all posted on my progress.
Bob
- Original Message -
From: Rex r...@sonic.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Friday, May 21, 2010 11:00 PM
Subject: Re: [time-nuts] (no subject)
Sorry about the empty
I am using a Garmin marine GPS antenna. I was under the impression the
unit would track on it's own, and the software was just for monitoring and
fine tuning.
If it's like the Z3801A, it probably knows where it was last located and is
having troubles trying to make sense out of the signals
Yes the Thunderbold truly is plug and play. In holdover of course the Rb
will be more stable ...
The RS-232 connection also lets you see if it has achieved GPS lock - you
can't tell without something that talks to the RS-232 interface.
Dave
-Original Message-
From:
comparisons).
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of David C. Partridge
Sent: Tuesday, June 30, 2009 7:49 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] (no subject)
Yes the Thunderbold truly
Hi David,
I don't know the Chinese ones, but I was lucky enough to get one of the TAPR
offer TBolts - and it really was PP - yes, I attached a PC and used the TBolt
monitoring utility to confirm it was all working OK, but that was all. It now
sits in my shack outputing 10MHz very nicely.
73,
Thanks Brian - a useful tip.
David
[EMAIL PROTECTED] 14/04/08 15:50
David-
Although you are likely OK being at VHF, please keep in mind that some
of the low-freq clock type oscillators have poor phase noise when
it comes to trying to copy signals like CW.
A good easy test is to listen to one
David-
Although you are likely OK being at VHF, please keep in mind that some
of the low-freq clock type oscillators have poor phase noise when
it comes to trying to copy signals like CW.
A good easy test is to listen to one of the oscillators on a good
general coverage RX and see how good the
David,
Both TI and Analog Devices have reasonably priced
evaluation boards for their PLL clock synthesizer/
clean-up parts. Still they are in the US$150 range;
maybe too high? They do require a PC connection
to program internal registers, but the TI parts have
NVRAM on chip could be swapped to
Don Collie jnr wrote:
ssSsSs
ssSsSSstestSSSssSs
?? -- Test message just above the noise floor?
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Hello,
Anybody can point a link to get manual or more info about a? LPRO-101? rubidium
osci.
Thanks a lot,
Ernie Peres HG5ED
Ps.? Marry Xmas and Happy New Year to everybody.
More new features than ever. Check out the
Christ and the American G.I.
One died for you soul; ~ the other for your freedom.
- Original Message -
From: [EMAIL PROTECTED]
To: time-nuts@febo.com
Sent: Thursday, December 20, 2007 8:59 AM
Subject: Re: [time-nuts] new subject
Hello,
Anybody can point a link to get manual or more
Go to
http://www.ko4bb.com/cgi-bin/manuals.pl
and search for LPRO
Didier KO4BB
[EMAIL PROTECTED] wrote:
Hello,
Anybody can point a link to get manual or more info about a? LPRO-101?
rubidium osci.
Thanks a lot,
Ernie Peres HG5ED
Ps.? Marry Xmas and Happy New Year to
to die for you, Jesus Christ and the American G.I.
One died for you soul; ~ the other for your freedom.
- Original Message -
From: [EMAIL PROTECTED]
To: time-nuts@febo.com
Sent: Thursday, December 20, 2007 8:59 AM
Subject: Re: [time-nuts] new subject
Hello,
Anybody can point a link
On Dec 20, 2007 10:39 AM, Didier Juges [EMAIL PROTECTED] wrote:
Go to
http://www.ko4bb.com/cgi-bin/manuals.pl
Or in particular,
http://www.ko4bb.com/Manuals/5)_GPS_Timing/LPRO_Users_guide.pdf
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To
It's temex with an M, not tenex with an N :
http://www.temextime.com/product_downloads/lpfrs_manual.pdf
Peter
Try this link http://www.tenextime.com/product_downloads/lpfrs_manual.pdf
-
Hello,
Anybody can point a
Hi Peter,
Thanks, all OK.
Ernie.
-Original Message-
From: Peter Vince [EMAIL PROTECTED]
To: Stuart [EMAIL PROTECTED]; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Thu, 20 Dec 2007 10:30 pm
Subject: Re: [time-nuts] new subject
It's temex
); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
You need another independent reference oscillator for the 3325 and run
the test again - that should make sure its not a synchronization
idiosyncrasy.
It could be at that low of a frequency change, they are swallowing a
pulse and
FWIW - I would not bid on this. Lousy photo, no documentation, and just not
a complete unit.
Rob K
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: 10 November 2006 18:10
To: time-nuts@febo.com
Subject: [time-nuts] (no subject)
In message [EMAIL PROTECTED], Rob Seaman writes:
Rob,
I started refuting you email point by point, but decided against
it. It all comes down to one fundamental issue which we disagree
on, there rest follows directly from that.
UTC is Universal Time joined to TAI. Universal Time is an
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