On Thu, 19 Jan 2012 10:02:56 +0100
mike cook michael.c...@sfr.fr wrote:
H (from a time serf). Some labs provide UTC(k) but do not generate
a TA(k) , maybe as there not enough clocks available. Some UTC(k)
providers have only one clock,.
This somehow doesn't make sense. Given you have
Yes, I was too fast, looked again and found only almanac data. I'll try on
my M12.
On Fri, Jan 20, 2012 at 2:04 AM, Tom Van Baak t...@leapsecond.com wrote:
No, @@Be is just the almanac data. That is not what you want.
On the M12 to get all the subframes you use @@Tr.
/tvb
- Original
Le 20/01/2012 09:37, Attila Kinali a écrit :
On Thu, 19 Jan 2012 10:02:56 +0100
mike cookmichael.c...@sfr.fr wrote:
H (from a time serf). Some labs provide UTC(k) but do not generate
a TA(k) , maybe as there not enough clocks available. Some UTC(k)
providers have only one clock,.
This
I've had one of mine running on a bench supply for about 2 days now. Have
just tried turning the voltage down, and things started to get unstable at
around 12.5V. It didn't drop out of lock however until about 9V.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com
Maybe there is a way to vary the C field through a digital command, in
one of their specifications I noticed a spec that stated that the frequency
can be set in 1 E-13 steps. Is there a DAC on the board?
Bert Kehren
In a message dated 1/20/2012 12:52:48 A.M. Eastern Standard Time,
On Thu, 19 Jan 2012 16:29:35 -0800, Chris Albertson wrote:
Could also be the all theses FE5680s don't have the same design. Already
we've seen some don' have 5V regulators possably they changed the 15v
side at some point?
Chris Albertson
Redondo Beach, California
Besides the 2 cheap
Mmmmh, problem: can't find the @@Tr command details... my M12 gives a
response for the @@Tr but at the moment I can't decode it. The Oncore VP
has the @@Bl command but the M12 doesn't recognize it. Is the @@Tr an
undocumented/secret command? Found a lot of PDFs on the M12 but no @@Tr in
them.
On
It is not surprising that many of these units work alright below their specified
voltage. I would imagine that the internal regulators, in addition to dropping
voltage, are also there to keep voltages stable, and thus help with unit
stability. So, a unit may work fine, and be able to meet
You will need to consult the ICD to decipher the data.
Connected by DROID on Verizon Wireless
-Original message-
From: Azelio Boriani azelio.bori...@screen.it
To: Tom Van Baak t...@leapsecond.com, Discussion of precise time and
frequency measurement time-nuts@febo.com
Sent: Fri, Jan
Starting Sunday I will do some voltage tests, giving up on aging test, nine
weeks is long enough. I will se if the next one is as good, how ever I do
not understand all the talk about running it at a lower voltage. Loosing
regulation will definitely impact performance. I have not analysed my
Of course I have to read the ICD200 but to collect data from the Tr I need
the Tr details. For example, the Bl command adds the SVID/frame/page to the
data and you must know how to separate the fields (it is very simple, the
are at the beginning).
OK, I know, I'll have to reverse engineer the Tr
Bob,
~2x10^-10 you can do this with a good frequency counter, no
mixers needed. ~2x10^-11 you can do this with a very good
/hard to find / expensive frequency counter. 1.0x10^-11
pretty easy, nothing very fancy required for a single mixer
approach. 1.0x10^-12 works fine with an RPD-1 and
Hi Nuts
I just bought a Racal-Dana 1991 (german eb..) , with options
01 : Inputs in back
4C : Unknown ? , but maybe some OCXO (i hope)
55 : GPIB
Does anyone know what option 4C could be ?
I hope some super nice OCXO option from USAF , they have bases in .DE
CFO (Time nut beginner)
On 1/20/2012 6:45 AM, cfo wrote:
Hi Nuts
I just bought a Racal-Dana 1991 (german eb..) , with options
01 : Inputs in back
4C : Unknown ? , but maybe some OCXO (i hope)
55 : GPIB
Does anyone know what option 4C could be ?
I hope some super nice OCXO option from USAF , they have bases in .DE
On Thu, 19 Jan 2012 11:16:39 -0800, Chuck Forsberg WA7KGX N2469R wrote:
I've written a few quickies to pull data from my 1992. Most run for as
long as I care to run them. The one I'm attaching invariably flummoxes
the counter after several hours. It does a frequency measurement, then a
phase
On Fri, 20 Jan 2012 07:33:59 -0800, Dan Rae wrote:
On 1/20/2012 6:45 AM, cfo wrote:
Hi Nuts
I just bought a Racal-Dana 1991 (german eb..) , with options 01 :
Inputs in back
4C : Unknown ? , but maybe some OCXO (i hope) 55 : GPIB
Does anyone know what option 4C could be ? I hope some super
I started a wiki page with the pin-out information ans was planning to copy the
most interesting posts, but I do not have one, so the incentive is pretty low
at this point. If you want to do it, be my guest.
http://wwwmko4bb.com/dokuwiki/doku.php
Didier KO4BB
Sent from my BlackBerry Wireless
Latest in ftp.omen.com
On 01/20/2012 08:33 AM, cfo wrote:
On Thu, 19 Jan 2012 11:16:39 -0800, Chuck Forsberg WA7KGX N2469R wrote:
I've written a few quickies to pull data from my 1992. Most run for as
long as I care to run them. The one I'm attaching invariably flummoxes
the counter after
Hi Didier,
That link didn't work. Can you check and re-send?
Thanks.
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of shali...@gmail.com
Sent: 20 January 2012 16:48
To: Time-Nuts
Subject: Re: [time-nuts] 15 volt power supply for
Correcting link
http://www.ko4bb.com/dokuwiki/doku.php
On 1/20/2012 10:47 AM, shali...@gmail.com wrote:
I started a wiki page with the pin-out information ans was planning to copy the
most interesting posts, but I do not have one, so the incentive is pretty low
at this point. If you want
Hi
I think we can debate the exact value of this or that at the some point in
the future our supervision of these gizmos stops.
What is very important is that *somebody* other than us knows roughly what's
what (this is worth trying to sell ...). One start might be - this is timing
stuff and
Hi
Your SR620 is in better shape than mine...
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Ulrich Bangert
Sent: Friday, January 20, 2012 8:54 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re:
Hi
I think there are two somewhat independent things flowing through this
thread. The first is - what is the real minimum voltage for this or that
level of operation. The second is - what is the voltage for *best*
operation.
Every time I've been down this road before with an Rb, the answer to
Racal Option 04C is not an ocxo. I received a Racal 1999 counter
advertised with ovened frequency standard but when I examined the
actual part installed, it was a simple modular oscillator, a NDK 23-9134
with only a single adjustment. It was not stable with room temperature
and devilish to
As I am, as Heinlein would say, but an egg in terms of time-nuttery,
perhaps someone could point me toward some history in order to help answer
a question recently posed to me.
At what point was the original global 1pps leading (trailing?) edge
defined/distributed and to what was (is) it
Hi
Based on the frequency plot of your unit, it swings about 35 Hz high and
about 170 Hz low as it sweeps. You could bump the trimmer on the VCXO and
move it up by about 70 Hz or so to keep it from running out of range. Since
the VCXO is trending down in frequency as it warms up, this may be
Hi
The original location of the PPS was from astronomical data. That's still
what ultimately steers UTC.
More precisely, for the US, there's a telescope at the Naval Observatory
that watches the sun as it comes overhead. The point it hits this or that
mark on the telescope tells you what the
I put my start at a FE-5860A FAQ on the K04BB wiki page here:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:fe5860a_faq
The wiki is open (amazing I didn't see any spam there) so anyone can add their
own FE5860 info as well. Thanks Didier for your very useful page!
Yes... if the C217 trimmer was not already at the very minimum setting! I was
thinking of possibly removing it altogether, maybe adding back a smaller fixed
C. All three of my units are pretty low in VCXO center frequency, and in fact
I wonder if that's the reason they were on the surplus
Could be they are over 9 years old and I think FE only ever suggested 7
years or less.
Granted we run till they are dead. Then fix'em and run'em some more.
So with that in mind I noticed something on start up today after adding a
large heat sink. Nothing to do with what I saw.
When the 10 Mhz
Can I run the coax feed-in from a Symmetricom 58532A GPS antenna
(feeding my T'Bolt) adjacent to coax which is carrying HF RF of 500
watts? I have a 1.5 hole through an outside wall in my house
through which my HF ham antenna coax passes (LMR400 coax). Can I
safely run the GPS antenna
Assuming the coax isn't tandy brand, and that you don't have RF current on
the outside of the shield, it shouldn't be any issue at all.
Otherwise it comes down to how much out of band junk the GPS can stand, what
its shield efficiency is, and how much RF is present there to leak in.
I've run my GPS antenna lead along with coax carrying 100 Watts on HF and 50
watts on VHF / UHF with no known issues.
I do have ferrite chokes on all my feed lines.
I also use the Symmetrciom 53532 antenna.
--- On Fri, 1/20/12, James Robbins jsrobb...@earthlink.net wrote:
From: James Robbins
Jim,
A few of the correct ferrite Common Mode Chokes on the lines would not
hurt. Also, use good quality coax, preferably with both a copper braid and
conductive foil to get near 100% shielding efficiency. Hardline is
probably better.
I'll ask about the best Common Mode Choke location. My hunch
I powered up the second unit. It has been running just fine for an hour
now. The only difference I noted is that the initial current was only
1.4 amp vs 1.8 on the other one. However, I set my power supply to 16.0
volts; no other difference. After warmup the current settled at ~700 ma
and the
In the past when I had that problem I used copper pipes as feed through the
wall and bend the pipes with a pipe bender one on each side. Never had a
problem, do not know if I would have other wise.
Bert Kehren
In a message dated 1/20/2012 1:46:32 P.M. Eastern Standard Time,
I thought of that, but I know where Jim lives and copper pipes stiking
through a wall would gather condensation and ice on the inside because
it'd conduct the sub-freezing temps inside and maske a real mess. The
situation would be reversed in summer.
He could use PVC pipe wrapped with a layer of
Yup after things get settled those are the right currents.
So try the other and see what happens at the higher voltage.
However if it should happen to work you have a very marginal unit.
I would contact the seller asap or skip the test and just ask for a return.
Regards
Paul.
On Fri, Jan 20, 2012
The key as you have both mentioned is good coax.
LMR400 is not heliax but its actually pretty good.
Now if we were talking some company called RS.
I can assure him there would be trouble brewing.
Maybe not at first but my experiance is the plastisizer (Think thats what
they call it)
Leaches out of
nichegeek and I are exchanging emails. nichegeek has been very
responsive, but before making a decision on how to handle this he asked
me to power up the second one and report back.
On 1/20/2012 1:37 PM, paul swed wrote:
Yup after things get settled those are the right currents.
So try the
exchange while the gettings good.
On Fri, Jan 20, 2012 at 2:48 PM, Paul F. Sehorne p...@sehorne.org wrote:
nichegeek and I are exchanging emails. nichegeek has been very
responsive, but before making a decision on how to handle this he asked me
to power up the second one and report back.
Actually, I've found Radio Shack RG-58 to be a pretty good replacement for
Radiax.
Don't fight it, just use it where it works well!
:)
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
There are many ham radio clubs in the country. It has been my experience that
many are not much more than gathering places for buddies to talk, but that they
would actually welcome technical activities, so it should not be too hard to
find such a spot.
You may have to get your ham ticket to
Having faced that problem due to a medical screwup, I've since acquired a
number of Tektronix TM500 mainframes and modules. While it is not the very
latest stuff, it is very compact, capable, repairable, and mostly
inexpensive.
-John
==
There are many ham radio clubs in the
It's in m12-gps-bit-stream.pdf under www.leapsecond.com/pages/m12/
/tvb
- Original Message -
From: Azelio Boriani
To: Tom Van Baak ; Discussion of precise time and frequency measurement
Sent: Friday, January 20, 2012 4:03 AM
Subject: Re: [time-nuts] Leap Second decision
OK, thank you for your help.
On Fri, Jan 20, 2012 at 11:04 PM, Tom Van Baak t...@leapsecond.com wrote:
It's in m12-gps-bit-stream.pdf under www.leapsecond.com/pages/m12/
/tvb
- Original Message -
From: Azelio Boriani
To: Tom Van Baak ; Discussion of precise time and frequency
I have a Spectracom 8170 in the living room (who doesn't?), and a Western Union
time-service clock, a.k.a SWCC clock -- a nice one, in a 3-foot-high wood case.
I've been watching TV with this combination for years and years but never got
around to feeding a pulse from the 8170 to discipline
Now I would agree with that. Still the short term degradation really a
nasty issue.
On Fri, Jan 20, 2012 at 3:52 PM, David VanHorn d.vanh...@elec-solutions.com
wrote:
Actually, I've found Radio Shack RG-58 to be a pretty good replacement for
Radiax.
Don't fight it, just use it where it
Some of the spectracoms like my 8170 actually put out timecodes and had
other options that were clever. It really depends on your comfort with
technology. Nothing at all wrong with a detector using 74ls30s or any
other mix of logic hitting a monostable and then a power transistor.
Snitching
You may remember my rant a few weeks ago regarding the 10 MHz output
of the Navsync CW12 GPS receiver. The issue was that it was, by
design, slightly off frequency. Further testing showed that the
offset was also temperature-dependent. Although this doesn't affect
its usability for it's
On Fri, Jan 20, 2012 at 10:41 AM, James Robbins jsrobb...@earthlink.net wrote:
Can I safely run the GPS antenna coax
through the same hole which would put the coax parallel with and touching
the other coax for about 8 inches. If not, how much separation would be
advisable?
In theory there
Hello Folks,
I have the chance to get hold of a 3575A, a HP Gain-Phase meter, would it be
any use for me as a time nutcase?
Many thanks,
Mark
inline: image001.gif___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
My hf antenna is approx 20 feet from my gps antenna and I've never noticed any
issues at 100 watts running rtty.
--
On Fri, 20 Jan, 2012 9:29 PM EST Chris Albertson wrote:
On Fri, Jan 20, 2012 at 10:41 AM, James Robbins jsrobb...@earthlink.net
wrote:
Can I
Mark,
Google gives this link as top of the list, and it does explain it.
http://www.amplifier.cd/Test_Equipment/Hewlett_Packard/HP_meter/HP3575A.htm
Very useful for Bode plots, but it doesn't do frequency stability.
Bill Hawkins
-Original Message-
From: Mark C. Stephens
Sent:
I added a heat sink to the FE5680.
Curious what temperatures have been measured after an hour warm up.
Before heat sink 120 F top and bottom.
With heat sink on the bottom quite a large one.
Top of case free air 105 F
Bottom 105 F
Internal, (screw out of the end and touching the internal heat
Yes indeed a good unit I have one and its fun to use. Though the hp 5370
works out better.
But heck if the price is reasonable grab it.
Regards
Paul
WB8TSL
On Fri, Jan 20, 2012 at 10:31 PM, Bill Hawkins b...@iaxs.net wrote:
Mark,
Google gives this link as top of the list, and it does explain
[Resend due to oops last night involving multiple email accounts.]
And here are the graphs from unit #1, the one that won't lock:
http://n5tnl.com/time/fe-5680a/graphs/fe5680_1_ch3.png
http://n5tnl.com/time/fe-5680a/graphs/fe5680_1_ch4.png
--
newell N5TNL
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