Hi
I would add a couple of surplus switcher coils to the setup and some good caps.
The switcher likely puts out 60 KHz and that's what you want to kill. Something
in the X.X mhy range and some reasonable caps (ceramic or very good plastic)
should do the job.
Bob
On Feb 16, 2011, at 1:19 AM,
Hi
My observation is that people who spend a lot of time at the keyboard tend to
be more likely to have a pocket watch. That's even more so if they are younger
and don't have a serious wrist watch habit.
Cell phone - who carries one of those?
If you are talking about a multi kilobuck watch,
Bruce,
I have collected yours comments, I hope they will be usefull for my next
doubler version.
A question: do you have ever made a physical doubler like this? if so, can you
show us the schematic, photos and results of measurements made?
Luciano
Luciano P. S. Paramithiotti
-Original
This has been a great read.
Though I don't have a need at the moment. I may assemble this with the
various comments just to try it out. Dead bug style.
Regards
On Wed, Feb 16, 2011 at 8:46 AM, Paramithiotti, Luciano Paolo S
luciano.paramithio...@hp.com wrote:
Bruce,
I have collected yours
This is the same reason why analog meters were preferred for some
activities: peaking for a maximum or a minimum, S and Vu meters, etc.
Even today some digital equipment have analog scale emulators like
bargraphs and so.
It looks like the brain processes faster those indications when you need
curious
Can you still get batteries for an omega???
On Wed, Feb 16, 2011 at 9:38 AM, Raj vu2...@gmail.com wrote:
Many decades ago when digital displays and quartz clocks were a novelty,
I built a table clock and presented it to my father a watch nut. He
regularly teased me that my digital
That estimate is probably about right. It hasn't been quite that expensive
for me but then I have a couple of Omegas; gave my Rolex to my nephew years
ago.
For your money, they remove the movement (or the calibre...or the ébauche et
assortiments...depending on how horologically snooty you care
IMHO, you still can get batteries very cheap by todays standards. My dad's
watch was
mechanical! He bought it in 1956. The time line got a bit distorted in my reply
to Bob!
curious
Can you still get batteries for an omega???
On Wed, Feb 16, 2011 at 9:38 AM, Raj vu2...@gmail.com wrote:
Many
On 2/15/11 11:10 PM, cook michael wrote:
Le 16/02/2011 07:21, Heathkid a écrit :
BLING?
Really? Seriously? A watch is considered bling now? Can you build
a mechanical watch in your workshop that is as accurate as those
manufactured 100 years ago? That's technology! Otherwise, a precision
I think if we are going to use terminology, we should try to use it correctly.
The term ebauche, is very similar to the term engine block. An ebauche is
an unfinished movement. It typically has not been fitted with all of the
jewels, balance, etc.. In Switzerland, like in Detroit, there are
Just became the owner of a PM6654 with a PM9691 OCXO. The OCXO looks
interesting. I am not able to make it count but that could be operator problem.
Any operator manual out there and what is known about the OCXO?
Thanks
Bert Kehren Miami
___
$400 is about what I expect to pay at a reputable watch repair shop in San
Francisco (Geneva Watch Repair) to restore my Omega Constellation, calibre 564,
chronometer. Probably well worth it although probably close to what it cost new
in 1971.
I think I will take my 1978 Seiko Chronograph,
Hi
All of that sounds so simple. Unfortunately there are lots of little
details. Back a long time ago the very large outfit I worked for decided to
make quartz watch movements. It's just electronics.
There were about five of us who did work on the watch electronics. I was
involved with the
This is the same reason why analog meters were preferred for some
activities: peaking for a maximum or a minimum, S and Vu meters, etc.
A story from a friend...
Many years ago, he was helping a student debug something in the lab. The
student had already checked everything with a
Which I suppose goes to show that:
1) know your instrument
2) never trust any single source of information
- Original Message
From: Hal Murray hmur...@megapathdsl.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Wed, February 16, 2011 6:53:23 PM
On Wed, Feb 16, 2011 at 10:05 AM, Tijd Dingen tijddin...@yahoo.com wrote:
Which I suppose goes to show that:
1) know your instrument
2) never trust any single source of information
3) When measuring a voltage on a power supply always remember to
switch the DMM to AC Volts to see what the AC
Just remember that on a DMM it only works for True RMS meters and for
low frequency signals. This is especially true for handheld meters.
You can see 60Hz ripple, but not most switchmode power supply ripple.
Neil Gruending
On Wed, Feb 16, 2011 at 10:18 AM, Chris Albertson
I figured someone would pounce on my post. If you think that time nuts can
be competitive, try watch nuts. None of us agrees with any of the rest of
us, no matter what.
It is true that the term ebauche, as it is used in the trade, very often
refers to an incomplete movement. It may or may not
Just became the owner of a PM6654 with a PM9691 OCXO.
+
The oscillator isn’t that bad. The specs say less than
5x10E-10 per day after 48hrs warm-up.
If everything seems ok but it doesn’t count, check to
See if the front inputs are connected. If there are
Identical inputs on the
And cold fluorescent tubes. I can often get my attic fluorescents to
start with a bright flashlight applied close to an end.
On 1/22/2011 5:05 PM, Bob Camp wrote:
Hi
Neon bulbs do the same thing. The ignition voltage is light sensitive. If you
see a place they are being used as a voltage
Can anyone direct me to information regarding using shift registers to
generate PN sequences using 1 pps and 10 MHz clock from GPS?
Specifically, I believe there is a relationship between the number of
stages, the period of reset (1pps) and the clock speed.
How would I figure this out to keep
You can download the Interface Control Document ICD200 at:
http://www.navcen.uscg.gov/pubs/gps/icd200/default.htm
The document includes, among many other items, the code generation
methodology for the GPS system. It shows the shift registers and gate taps.
Sincerely,
John WA4WDL
On 02/16/2011 06:18 PM, ewkeh...@aol.com wrote:
Just became the owner of a PM6654 with a PM9691 OCXO. The OCXO looks
interesting. I am not able to make it count but that could be operator problem.
Any operator manual out there and what is known about the OCXO?
And now back to our regularly scheduled program ...
I just installed my HP equipment in a rack and now I can actually turn
everything on and off with a single switch.
One HP5334B, when powered on goes through the self-test and then shows a series
of dashes with no signal input. Same for the
AHA! The English system triumphs over that Metric nonsense.
My Rolex stopped working about 20 years ago. OTOH, my $12 Timex analog
quartz still works fine
I think. At least it was working when I misplaced it a year ago. Since
then, I've discovered I really don't need to know time to much
Right, to follow up on my own email
I took it apart
The lamp assembly has failed.
In the PRS10 the lamp is exited by a strong RF field @ 150Mhz
this is generated by an MRF134 within the lamp package
The failure mode was caused by the growth of a substantial tin whisker
within the lamp
Approximately 2.25mm (that metric nonsense). [?]
On Wed, Feb 16, 2011 at 3:05 PM, J. Forster j...@quik.com wrote:
AHA! The English system triumphs over that Metric nonsense.
My Rolex stopped working about 20 years ago. OTOH, my $12 Timex analog
quartz still works fine
I think. At
If you want to write a turd note about their service, I will pin it on their
door. These companies need to know the reach of the internet.
If they had any brains, they would offer you a replacement at a ridiculously
high price.
-Original Message-
From: Brendan Minish
Well, this thread caused me to dig out a Girard-Perregaux
Gyromatic 39 jewel self-winder that my father gave me in the
late fifties, after his trip to Switzerland.
To your point, the face just has five horizontal lines that
cross it. There are no numbers except for the day window.
The ends of the
Hi Bert,
this should be a help:
http://128.238.9.201/~kurt/manuals/manuals/Other/
cheers,
ian
From: ewkeh...@aol.com
Subject: [time-nuts] PM6654
To: time-nuts@febo.com
Message-ID: 1a8812.1c7bfe4b.3a8d6...@aol.com
Content-Type: text/plain; charset=US-ASCII
Just became the owner of a
For clarification;
I am investigating an experiment using GPS to create a FHSS or DSSS
project similar to those of AMRAD and described in the ARRL Spread
Spectrum Sourcebook. In those experiments, a specific shift register
sequence was used (see below), the clock was free running and a reset
write a letter (real one) to their ceo pres and if there is a
engineering VP, only cost you a buck, fifty.
sometimes works
-pete
On Wed, Feb 16, 2011 at 12:11 PM, Brendan Minish
ei6iz.bren...@gmail.com wrote:
Right, to follow up on my own email
I took it apart
The lamp assembly has failed.
Maybe get a1980s strobe light and some fiber and pipe it in.
If you read through the thread though indeed the heat gun at 300 degrees did
recover the rb lamp nicely and I am burning it in for several weeks to see
if it stays lit or decays.
On Wed, Feb 16, 2011 at 2:27 PM, Oz-in-DFW
Well a couple answers.
If those are RB whiskers try the heat gun at 300 degrees on it for 15
minutes. As Magnus suggests and I just tried for the first time. It actually
worked and I recovered the rb lamp.
I imagine the transistor may be hard to get but its a motorola should be
obtainable.
Good
MRF134's are available on *pay and from other sources for a LOT less $$
than a lamp assy would cost if available.
Adrian
Brendan Minish schrieb:
Right, to follow up on my own email
I took it apart
The lamp assembly has failed.
In the PRS10 the lamp is exited by a strong RF field @ 150Mhz
Your GP could very likely be restored to pristine condition. Wouldn't be
cheap, though.
OTOH, a GP isn't cheap.
On Wed, Feb 16, 2011 at 3:37 PM, Bill Hawkins b...@iaxs.net wrote:
Well, this thread caused me to dig out a Girard-Perregaux
Gyromatic 39 jewel self-winder that my father gave
Don't know why but I seem to recall its missing the reference
On Wed, Feb 16, 2011 at 3:01 PM, Flemming Larsen oz...@yahoo.dk wrote:
And now back to our regularly scheduled program ...
I just installed my HP equipment in a rack and now I can actually turn
everything on and off with a single
not a solution but what is the inrush current when you throw the main
switch ? Just something to watch out for.
On Wed, Feb 16, 2011 at 12:01 PM, Flemming Larsen oz...@yahoo.dk wrote:
And now back to our regularly scheduled program ...
I just installed my HP equipment in a rack and now I can
Thank you. Bert
In a message dated 2/16/2011 4:08:29 P.M. Eastern Standard Time,
cadbl...@hotmail.com writes:
Hi Bert,
this should be a help:
http://128.238.9.201/~kurt/manuals/manuals/Other/
cheers,
ian
From: ewkeh...@aol.com
Subject: [time-nuts] PM6654
To: time-nuts@febo.com
Hi
According to the rules, you are not allowed to reset shift register other
than by feedback during a transmission. In order for a reset to be
transparent it would have to always happen at the same time. Usually
that's when the register is full or empty.
A proper (MLS) PN sequence will be
Thank you Bert
In a message dated 2/16/2011 2:50:47 P.M. Eastern Standard Time,
mag...@rubidium.dyndns.org writes:
On 02/16/2011 06:18 PM, ewkeh...@aol.com wrote:
Just became the owner of a PM6654 with a PM9691 OCXO. The OCXO looks
interesting. I am not able to make it count but that
On 02/16/2011 10:31 PM, paul swed wrote:
Well a couple answers.
If those are RB whiskers try the heat gun at 300 degrees on it for 15
minutes. As Magnus suggests and I just tried for the first time. It actually
worked and I recovered the rb lamp.
While the heat gun on the Rb lamp is a nice
Arthur, will check. Thanks Bert
In a message dated 2/16/2011 2:24:12 P.M. Eastern Standard Time,
golgarfrinc...@yahoo.com writes:
Just became the owner of a PM6654 with a PM9691 OCXO.
+
The oscillator isn’t that bad. The specs say less than
5x10E-10 per day after 48hrs
Hi
Since the unit is current production, the part should be around. There are a
number of the old Motorola RF parts that are very hard to find. They have
been out of the RF business for quite a while. That should not be one of
them.
Based on a quick search, M/A-Com seems to make them. $20.95 at
Hi
Real solder has lead in it to eliminate tin whiskers.
We're going to see a lot of stuff die in the coming years from these little
critters.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Wednesday,
Like always they have them on ebay. I know most of you do not like them but
they are for me the best source of obsolete parts.
Bert
In a message dated 2/16/2011 4:57:45 P.M. Eastern Standard Time,
li...@rtty.us writes:
Hi
Since the unit is current production, the part should be around.
MRF134s are pretty available. Usually under $25.
http://www.rfparts.com/transistors_MRF-TP.html
In the PRS10 the lamp is exited by a strong RF field @ 150Mhz
this is generated by an MRF134 within the lamp package
The failure mode was caused by the growth of a substantial tin whisker
I'm not familiar with FHSS or DSSS, but pseudo random sequences from LFSRs
are used as scramblers on serial links. The idea is to avoid long strings of
0s that will provoke clock recovery troubles. The transmitter XORs a pseudo
random sequence with the data stream and the receiver does the
http://nepp.nasa.gov/whisker/
I've fixed two cell phones for friends and I have a very nice MP3
player I got for $1.
Each was fixed with a stiff brush with a combination of compressed air
(outside) and
a vac inside.
-pete
PS if you do the air thing don't forget about static use a ionizer.
This turns out to be a really neat document. It has foldouts that I
couldn't scan in one piece with the equipment I have, so I sent it to Dave
at Artek Media. He's done a stalwart job of scanning the manual at high
resolution with as much of its original patina as could be retained
without going
Before my fire, I had the 5 or 6 volume 'manual' for the B-24 bomber.
A good 2/3rds of the drawings and almost all the foldouts where colour.
Def will order one of these from Dave.
-pete
On Wed, Feb 16, 2011 at 2:25 PM, John Miles jmi...@pop.net wrote:
This turns out to be a really neat
Interestingly it was not your normal tin whisker (I have seen a few of
those, just..) it was a substantial one that had grown out from the
stack of 2 Ceramic caps in series with the coil to the RF choke in
series with the DC supply to the lamp housing.
It might even have been a solder blob
MRF315 should also work
Bert Kehren
In a message dated 2/16/2011 5:37:49 P.M. Eastern Standard Time,
ei6iz.bren...@gmail.com writes:
Interestingly it was not your normal tin whisker (I have seen a few of
those, just..) it was a substantial one that had grown out from the
stack of 2
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.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
Joe,
On 02/16/2011 10:13 PM, Joe Leikhim wrote:
For clarification;
I am investigating an experiment using GPS to create a FHSS or DSSS
project similar to those of AMRAD and described in the ARRL Spread
Spectrum Sourcebook. In those experiments, a specific shift register
sequence was used (see
My original (red box) T-bolt runs off a 28VDC supply. For that, it has a
built-in DC/DC converter. The specs are the same as they are for the more
common (and more recent) version.
You do not need rocket science to make a switcher quiet enough for most
purposes, just care and good engineering.
Bob,
On 02/16/2011 10:51 PM, Bob Camp wrote:
Hi
According to the rules, you are not allowed to reset shift register other
than by feedback during a transmission. In order for a reset to be
transparent it would have to always happen at the same time. Usually
that's when the register is full or
Yup think I will order a download tomorrow from Dave.
Looks like real time nuts equipment. Power, heat, and weight. What more
could you ask for.
Oh the ability to actually see the components I will bet.
But I bet this would be quite a read as manuals go.
Thanks John
Regards
Paul.
On Wed, Feb 16,
Hello time enthusiasts! I'm hoping for your advice on my (perhaps modest, by
this list's standards) project.
I would like to make a frequency calibration of a 10 MHz oscillator to 1 ppm
(1E-6) or better, using some basic equipment. I do not have a GPSDO or any
serious lab equipment, or
Thanks Hal;
Transceivers A and B (C etc) would extract clock and 1 PPS from their
own GPS. The idea is to use 1 PPS (or derivative) to reset periodically.
Yes the propagation delay A-B would limit the hopping/spreading rate
unless some mechanism to correct the offset at the receiver end. (I
Thanks Bob;
Does this mean that the 10 MHz clock needs to be somehow divided to an
integer evenly divisible by 127 seconds?
Also 8192 seems to be unfeasible as it would take 2.2 hours to
initialize sync.
On 2/16/2011 4:51 PM, Bob Camp wrote:
Hi
According to the rules, you are not allowed
You should be able to zero beat your 10Mhz oscillator to the 10Mhz
WWV signal. You can get to better than 1Hz which at 10Mhz is better
then 0.1ppm
Tune the receiver to WWV. You may have to wait until the evening when
signal is good. then connect a long insulated wire from the 10MHz
oscillator
Mmmm well you have another uncalibrated and not very good crystal there in
the sound card, but that is not the problem.You also have some receiver
drift (Sony) I suspect at 5MHz. I would be surprised if WWV went as much as
1Hz off over a night let alone 10Hz..
Divide the 10Mhz by 2 and leak it
Didier et al,
I did not ask for, and did not expect rocket science. Just a simple solution or
advice from some of the much more experienced people on this list. I am trying
to put my equipment together after having had everything in storage for several
years. Being retired and on a limited
beale wrote:
Hello time enthusiasts! I'm hoping for your advice on my (perhaps modest,
by this list's standards) project.
I would like to make a frequency calibration of a 10 MHz oscillator to 1
ppm (1E-6) or better, using some basic equipment. I do not have a GPSDO
Divide the oscillator by
Just sent Dave a paypal request.
On Wed, Feb 16, 2011 at 7:48 PM, paul swed paulsw...@gmail.com wrote:
Yup think I will order a download tomorrow from Dave.
Looks like real time nuts equipment. Power, heat, and weight. What more
could you ask for.
Oh the ability to actually see the
John,
I've had quite a bit of experience doing what you want to do, and have tried
several methods. TV used to be a good way, but now that everything's gone
digital that method is out.
Despite advice to the contrary, comparing with WWV or similar on HF is NOT
reliable to 1ppm. This is because
On 2/16/11 1:13 PM, Joe Leikhim wrote:
For clarification;
I am investigating an experiment using GPS to create a FHSS or DSSS
project similar to those of AMRAD and described in the ARRL Spread
Spectrum Sourcebook. In those experiments, a specific shift register
sequence was used (see below), the
Also on the subject of Cs reference service manuals, Artek is looking for a
copy of the HP 5061B service manual to scan. If anyone can help, you'll get
your original back plus two free manual CDs of your choice. Contact Dave at
manuals (at) artekmedia.com if interested.
-- john, KE5FX
On 2/16/11 1:13 PM, Joe Leikhim wrote:
For clarification;
I am investigating an experiment using GPS to create a FHSS or DSSS
project similar to those of AMRAD and described in the ARRL Spread
Spectrum Sourcebook. In those experiments, a specific shift register
sequence was used (see below), the
On Feb 16, 2011, at 3:37 PM, Bill Hawkins wrote:
Well, this thread caused me to dig out a Girard-Perregaux
Gyromatic 39 jewel self-winder that my father gave me in the
late fifties, after his trip to Switzerland.
Holy Balance Wheel, Batman, that's some watch!
(I joined the group to see
Hello fellow Garmin 18x users,
About 2 months ago, I wrote a message on this list - that my Garmin
18x was 1 second slow to UTC.
With the help of a few other kind folk here, we came to the conclusion
that the only firmware version a Time Nut should use with the 18x is
3.20
I noticed today that
On 2/16/11 4:58 PM, Joe Leikhim wrote:
Thanks Hal;
Transceivers A and B (C etc) would extract clock and 1 PPS from their
own GPS. The idea is to use 1 PPS (or derivative) to reset periodically.
Yes the propagation delay A-B would limit the hopping/spreading rate
unless some mechanism to correct
On 2/16/11 5:04 PM, Joe Leikhim wrote:
Thanks Bob;
Does this mean that the 10 MHz clock needs to be somehow divided to an
integer evenly divisible by 127 seconds?
Also 8192 seems to be unfeasible as it would take 2.2 hours to
initialize sync.
No.. your 1pps/sync loads the register with
I forgot to say that Eric Vittoz, whom I mentioned in the crystal thread, was
out of the Swiss Federal Institute. OK, not fine Swiss movements, but fine
Swiss engineering, especially low power CMOS design found in quartz watches.
___
time-nuts
Hi Murray,
Thanks to you and the others for your replies. After some more HF reception
problems here, I have come to the same conclusion as you. I found an Oncore
M12+ timing GPS is available pretty cheap from Hong Kong, so that's my plan.
best regards,
John Beale
1. My best advice is to
On Wed, Feb 16, 2011 at 10:09 PM, John Beale be...@bealecorner.com wrote:
Hi Murray,
Thanks to you and the others for your replies. After some more HF reception
problems here, I have come to the same conclusion as you. I found an Oncore
M12+ timing GPS is available pretty cheap from Hong
Hello fellow Garmin 18x users,
[]
I noticed today that Garmin have a new 18x firmware version, release
date =
GPS 18x PC/LVC Ver. 3.60 as of Jan 04, 2011
( Fixed factory firmware flash capabilities. )
[]
It is very odd, clearly Garmin are adding more stuff
Yes they sell for about $35 on EB. But you will need to build a
support/interface for it. Yo will need some voltage regulators, a
74*04 inverter (the RS232 standard has DCD non-inverted but inverts
data) TTL to RS232 level converters, 10-pin female headers and other
misc parts. And a GPS
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