I had to deal with this problem about 15 years ago while writing time
synchronization software for the Win32 platform (95, 98, NT, etc). It was
a nightmare until I realized I could just look and see what the timezone
offset was set to for the whole computer. After that it was trivial. I
let
Industry doesn't use microphones. It's piezo pickups or inductive pickups
(coils) for things like tuning fork movements in accutrons. For quartz
they use probes.
http://forums.watchuseek.com/f6/watch-timing-microphone-646148.html
On Sat, Apr 19, 2014 at 11:12 AM, Chris Albertson
Commercially they use piezo transducers (bender disks) in direct contact
with the watch to hear them tick. I did my best to build one up several
weeks ago. I could hear ants walking but my cheap swiss movement was just
too quiet. It was amazingly quiet, even going through a preamp and dialing
Hopefully. Lasers are not toys. The energy densities are enormous and
they can and do blind people.
-Bob
On Sat, Jan 18, 2014 at 9:19 PM, Perry Sandeen sandee...@yahoo.com wrote:
Will owner
permits be coming in the future?
Regards,
Perrier
Yes, but not for technical reasons. I'm opting to build my own for the $15
in parts. Not quite free, but at the same time this isn't new to me and it
won't take long and I'll probably learn a little.
-Bob
On Thu, Aug 15, 2013 at 11:22 AM, Eric Garner garn...@gmail.com wrote:
Is anyone else
Machinists know that 1 inch is exactly 2.54cm or 25.4mm. It's a
definition, not a coincidence.
-Bob
On Tue, Jun 25, 2013 at 10:17 AM, Bob Stewart b...@evoria.net wrote:
Hi Hal,
I had always used 25.4001 or .03937 to do my conversions. So, I looked
online and found the .039370078 and did
I used to produce ultrasound transducers using a very similar method. I'd
continuously monitor the resonant frequency with a network analyzer as I'd
lay down gold/silver/whatever with an evaporator cup from both sides. My
chamber has a shutter to cover the transducers (I think it has 12 or 15
Their local distributer (Vic Meyers Associates) just emailed me back with a
quote. $99 a pop for the Symmetricom analog displays/clocks. They are out
of digital time displays. I hear that Symmetricom is getting out of the
time display business. The guy said they're still going to keep their
AM, Robert Darlington rdarling...@gmail.com
wrote:
Their local distributer (Vic Meyers Associates) just emailed me back
with a
quote. $99 a pop for the Symmetricom analog displays/clocks. They are
out
of digital time displays. I hear that Symmetricom is getting out of the
time
In another thread that was active today, the Symmetricom NTP clocks were
mentioned. I bought two today for $99 a pop, both power over ethernet
models, but they have a line powered model too. One 12 hour face and one
24 hour face.
On Wed, May 29, 2013 at 12:13 PM, Eric Williams wd6...@gmail.com
On Wed, Apr 24, 2013 at 1:04 AM, DaveH i...@blackmountainforge.com wrote:
If I walked into Parts Express's corporate headquarters in Ohio and
purchased some stuff, I could show my WA State drivers license and be
exempt
from the Ohio sales tax. Why is this any different from an online
They're legit, I think it's important to collect sales or gross receipts
tax on orders as normal, and see no reason why there should be an exemption
for Internet sales, nor any reason why we're discussing it on this mailing
list!
-Bob
On Tue, Apr 23, 2013 at 8:22 AM, J. Forster j...@quikus.com
They're half decent 75 ohm connectors out to about a GHz if you do that.
On Thu, Apr 11, 2013 at 10:10 AM, steve gunsel st...@sgteq.com wrote:
Hi,
Not too long ago there was an interesting discussion here about RF
connectors. I have always wondered about the F connector - used by the
I ended up buying this as I've wanted one for a while. It arrived today
and I swept it with the network analyzer. At whatever temperature my shop
was at the time I took the measurement, it had a sharp insertion loss at
10.000233MHz. Pretty cool. I can post plots if there is any interest or
Alligator clips, of course.
-Bob
On Sun, Mar 3, 2013 at 11:50 AM, Henk ten Pierick h...@deriesp.demon.nlwrote:
Hi,
The use of double shielded cables does raise the question to what type of
connectors to use?
Regards,
Henk
Op 3 mrt. 2013 om 17:30 heeft Jim Lux jim...@earthlink.net
These are nice counters, but they're slow. My 5335A takes ~ 6 seconds to
do a full resolution measurement.
-Bob
On Wed, Feb 27, 2013 at 11:09 AM, Paul Berger phb@gmail.com wrote:
I am considering getting a counter with better resolution than my 5316A,
and have been looking at 5335A,
On Fri, Feb 8, 2013 at 12:34 PM, Don Latham d...@montana.com wrote:
Actually, yes. I also have two USB microscopes, and even some rohs
solder and stuff. I just find it's easier to find thru hole stuff when
it falls on the floor.
Everything wants to go to the lowest potential energy...
Don
On Thu, Feb 7, 2013 at 4:02 PM, Don Latham d...@montana.com wrote:
through hole forever :-)
Don of the old hands and blurred vision :-)
ewkehren
I grew out of thru-hole about 10 years ago. My nearly 40 year old eyes
have trouble reading the numbers on 0603 parts for the past few years,
My gut feeling is that it's pretty easy to measure propagation delay over
fiber, especially if it's long. Is there some reason you can't just bounce
light off the far end of the cable and measure round trip time? I don't
know the electronics involved in signaling with fiber but surely you could
Instead of making us dig for it, could you provide an item number?
-Bob
On Fri, Jan 25, 2013 at 4:41 PM, cdel...@juno.com wrote:
Hi,
I put up an FTS 1000A/100 oscillator on the eBay. Stability day in the
PIX.
Corby
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Ditto on that. I'm up in Los Alamos. Getting into computers is my
specialty.
-Bob
On Fri, Dec 21, 2012 at 7:29 AM, Kevin Rosenberg ke...@rosenberg.netwrote:
If needed, I can provide some local help. Karen's address is a
short drive from my home.
Kevin
On Dec 21, 2012, at 7:15 AM, paul
This came across my inbox from a caving mailing list and found it to be
pretty interesting and time-nuts related:
http://www.mediadesk.uzh.ch/articles/2012/mit-atomuhren-das-erdinnere-vermessen_en.html
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I like the Symmetricom ND-4, however I don't know if you can have it
alternate between TZs. You can buy more than one and label them like
I did.
http://www.symmetricom.com/products/gps-solutions/time-code-displays/Network-Time-Displays/
They can get NTP server and timezone through DHCP options,
On Sat, Sep 29, 2012 at 7:39 PM, gary li...@lazygranch.com wrote:
I've only used 3M clips, so I can't say who makes the best clip.
http://www.hmcelectronics.com/product/3M/923650-08
There is a gold plated version too. 923655-08
Pomona might be OK
I use Pamona chip clips (at least that's
This is the one. Sorry for not taking the time to send this in the
previous email:
http://www.mcmelectronics.com/product/POMONA-5514-/201-075
-Bob
On Sat, Sep 29, 2012 at 9:35 PM, Robert Darlington
rdarling...@gmail.com wrote:
On Sat, Sep 29, 2012 at 7:39 PM, gary li...@lazygranch.com wrote
Just do a Google image search for analog atomic watch. Pick the one
you like. There are several in the $50-$60 price range that are
attractive. Many are solar so there are no batteries to replace.
They're all set by WWVB nightly (usually) so they're well within a
second of accuracy.
-Bob
On
The waveceptor's are okay but I can't wear mine much because I tend to
cross timezones a lot. The hands only run in one direction so when
going to the west, it has to spin 11 hours forward. This takes 20
minutes. I guess it's one way to kill time on an airplane.
-Bob
On Sun, Sep 9, 2012 at
You want to start with a GPSDO. I like the Trimble Thunderbolt. The
price is right and they're readily available. I have no experience
with the HP units but they seem to be highly regarded.
Rb oscillators are great for some things, but need to be calibrated.
That's where the GPSDO comes in.
It's a pain to capture on any scope, but really easy to see with an
LED across the output. it's not bright, but definitely easy to see on
my tbolt.
-Bob
On Mon, Jul 23, 2012 at 10:11 AM, Stephen Farthing squir...@gmail.com wrote:
Hi Guys,
I have a couple of Trimble T Lassen 2 boards I bought
Take a look at porous PTFE products like POREX. High gas
permeability, low liquid permeability.
-Bob
On Tue, May 15, 2012 at 11:43 AM, Lee Mushel herbe...@centurytel.net wrote:
Well, remember that Tyvek is not a vapor barrier---that's what makes it so
useful but if you're going to use it I
If you guys go the PIC route, I'm always happy to burn them for the
group for cheap. I think in the past I was doing 5 bucks for the
first one (including delivery) plus $2.50 for each additional. I
still have a ton of those plastic chip tubes for mailing them so the
pins don't get bent.
-Bob
Ur car is in row n spot 14e at airport parking. Gave keys to driver
Tom c. They're in envelope at front.
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Oh gosh. Sorry guys. I have a nickname of me for when I want to
email myself. Sometimes it matches on the first two letters of
measurement and matches this list.This is the first time (that I
know of) that I didn't catch it.
-Bob
On Fri, Apr 20, 2012 at 4:10 PM, J. Forster j...@quikus.com
I need lots of memory on scopes. A buddy of mine I worked with in the
ultrasound world actually yelled at the Tek product management and
asked if they actually *use* oscilloscopes. The answer was a sheepish
no, and yet they felt qualified to develop the products for the
company.
The cheap
Eagle all the way. It's free and the documentation is good enough to
get you by. There is a huge hobbiest following as well if you get
stuck. Definitely read the tutorial on creating parts. It'll be
nearly impossible to wing.
The free version has some limits. 80mmx100mm boards, 2 layers, and
Typically you can resume ftp transfers with the reget command. It
has to be implemented on the server.
There are tons of file sharing services on the web that are free. Why
go back to the 1980s?
-Bob
On Tue, Feb 21, 2012 at 3:21 PM, Chuck Forsberg WA7KGX N2469R
c...@omen.com wrote:
I use
I gotta remember the time-nuts list when I put stuff on ebay. One mention
here and the price goes up and up and up and up to a point where I can't
afford it anymore.
-Bob
On Tue, Jan 17, 2012 at 1:43 PM, Bob Bownes bow...@gmail.com wrote:
if anyone is looking for a 5370, there is one on ebay
Thought this was interesting.
http://www.universetoday.com/92306/new-year-new-calendar-but-johns-hopkins-scholars-say-we-need-a-permanent-edition/
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I'm getting a signal out with 3.3vDC in. I haven't tried to test this
higher.
-Bob
On Thu, Dec 22, 2011 at 9:25 PM, Dan Rae dan...@verizon.net wrote:
Does anyone have any data on the Vectron OCO500-18 OCXOs that were being
bundled with the Rb units on eBay? Operating voltage for example? I
It looks like he laid out paper to use as a background and the PCB is just
under the edge of one sheet.
-Bob
On Mon, Dec 19, 2011 at 1:49 PM, aartmol...@comcast.net wrote:
I think the PCB cut off at ebay # 300628220912 is an image artifact. If
you look carefully you'll see the cut extend into
Hi guys,
I know there has been recent talk about this and it got me back into
building my PICTIC II boards. I went through the parts list and created a
new copy that includes everything except U6, the 74AC175 chip that is out
of production. Part ID numbers (C16, R8, etc) are listed as well.
Up till three or so years ago the VLA (Very Large Array radio telescope)
was using a PDP 11/70. Most of the workstations were Sun Ultra 1 systems
that were horribly outdated to a point where I had already sent mine to
land fill a few years before. Now they have a spiffy Linux cluster on
modern
I didn't feel like digging for an allen key so I just drilled from the back
side of the board. I didn't go all the way through. It was just enough to
remove the nut or anchor that was attached to the PCB. It took about 1
minute.
-Bob
On Wed, Dec 14, 2011 at 2:48 PM, Don Latham
On Wed, Dec 14, 2011 at 4:34 PM, Rex r...@sonic.net wrote:
I don't think the strange oscillator is part of the Rb board.
That's correct. The OCXO is a brand new part that is thrown in and has
nothing to do with the board the Rb is on. Same for the DE-9 connector. I
can use the connector
I just ordered the parts for this filter from Mouser Electronics. ~ $30
plus shipping including a shiny new Pomona box.
qty 2 542-78F1R0-RC RF Inductors 1.0uH 10% @ $0.18 ea
qty 2 140-50S5-271J-RC Ceramic Disc Capacitors 50V 270pF SL 5% Tol @ $0.14
ea
qty 1 140-50S5-471J-RC Ceramic Disc
I have a copy and I like it, however you can just set your system scheduler
to update your clock more often. Win 7 is 1x a week out of the box but
it's easy enough to set to once every 15 minutes if you want. It's also
free.
I've done this but don't remember the detail on the wiring. The data sheet
made it clear though. One thing I did notice is that the oscillator
seemed to power the chip! If I were doing it again I'd probably use some
kind of powered buffer on the oscillator input so that when I power down
the
If you want altitude and speed, I recommend the Lassen IQ. ~$25 USD
receiver. Good to 18000 meters (59k feet) and 500m/s (1118 MPH). You can
exceed any ONE of these specs, but not both. Not really useful for
timenuttery though but used often in high altitude balloons.
-Bob
On Thu, Nov 24,
The manual says Model 10638A Degausser is used with any HP 5061A Cesium
Beam Standard which has Option 004 High Performance Tube installed.
Degaussing is needed to obtain optimum performance from the Option 004 Beam
Tube.
I'm not replying to anybody in particular, just hit the reply key on the
last email.
Guys, this is rather off topic, dontchathink? Get over it. Whining won't
change how I post, but perhaps asking nicely might.
-Bob
On Wed, Sep 21, 2011 at 12:05 PM, Don Latham d...@montana.com wrote:
What he
Careful, my particle physicists run RedHat. To be honest, I never heard of
Scientific Linux. Looking into it, I see it's a custom distro put together
by CERN.
-Bob D (Los Alamos National Lab)
On Sat, Sep 17, 2011 at 2:41 AM, gary li...@lazygranch.com wrote:
Interesting story, though I
It is a hobby called benchmarking. Check it out over at geocaching.org.
I've tracked down several that hadn't been seen in many decades, updated
Uncle Sam with current coordinates (hand held gps so they can find them and
then survey it at high precision later if they want to).
-Bob
On Wed, Sep
The problem is if you use your Rb as a reference for the counter. It will
always read 10MHz. If you don't use it, something will drift. I opted to
just panel mount an LED to indicate lock.
-Bob
On Fri, Jul 15, 2011 at 1:57 PM, Richard W. Solomon w1...@earthlink.netwrote:
That was quick,
Okay guys, I saw a very strange timepiece when I was out shopping. If it
wasn't $17k I'd consider it:
http://www.youtube.com/watch?v=4PwJCzetTCI
Interesting concept, looks good. On a side note, earlier today a friend
gave me an Accutron 214 from 1965 that previously belonged to his father.
I love my 8712ES, it's a great little (4U) unit but only goes up to
1.3GHz.It does have a 10MHz ref in port on the back which is also handy.
-Bob
On Mon, Jul 4, 2011 at 4:23 PM, Jose Camara camar...@quantacorp.com wrote:
Javier:
I'll be listing on eBay later today or tomorrow a
Hi guys,
I built a nice little chassis for David's divider board and documented it
a bit. If interested, please have a look here:
http://www.nerdhouse.org/projects/frequency_divider
Have fun,
Bob, N3XKB
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Hi Dick,
See page 27 of this document (as numbered at the bottom of the page, or PDF
page 29):
http://trl.trimble.com/docushare/dsweb/Get/Document-388613/ThunderboltE_UG_1B.pdf
The Trimble Bullet antenna for the TBolt has 28dB gain and they recommend
RG-59 coax. Brooke's page (
EEPROM's do have a finite number of write cycles to any particular memory
location, but it's about 100,000 or more. That's 11 years worth if written
to once an hour round the clock (the same location in memory, that is).
This is probably not the issue. I personally never noticed but then again,
I've done this recently and have bought several Symmetricom GPS time servers
(S200, S350, etc). I've also built the net4501 up as a time server and do
not recommend it. Mine was extremely flaky and I couldn't trust it to stay
up unless it was on very clean power (big UPS) and even then it
Holy Jeebus!That 2nd URL has the first picture I ever saw on your site
that gives you a bigger version when you click it. Every other one I saw
will just give a copy of the exact same picture upon clicking.I should
give up now while I'm ahead!
That being said, I really like these retro
What's an Ultra 27?
-Bob
On Tue, May 24, 2011 at 11:47 AM, Dr. David Kirkby
david.kir...@onetel.netwrote:
On 05/24/11 06:51 AM, Said Jackson wrote:
How about a GPSDO in 1 x 1 x 0.5 inch footprint?
Check out the new MtronPTI M9107 and M9107 GPSDOs.
Check out the press release about these
I actually asked in jest, thinking there was no such beast and that it was a
typo. I'm an old Sun guy, apparently too old to know about the new stuff.
Looks like an expensive PC.
On Tue, May 24, 2011 at 9:33 PM, Dr. David Kirkby
david.kir...@onetel.netwrote:
On 05/25/11 03:29 AM, Robert
Guys, I gotta ask, what does this have to do with time keeping? Am I
missing something?
-Bob
On Fri, May 20, 2011 at 9:59 PM, w...@aol.com wrote:
So here are some URL's to explain the pattern for KNTH...
If you will note, there are two Texas stations that KNTH is protecting,
since they
That's not a conflict. Windows thinks the tbolt is a mouse. Go into
device manager and delete the serial mouse or disable it.
-Bob
On Wed, May 11, 2011 at 7:23 AM, Stan, W1LE stanw...@verizon.net wrote:
Hello David,
The symptoms include: eratic mouse cursor that stabilizes (corrects)
Ouch, $3k! My $50 watch that talks to WWVB does just as good a job when
measuring it with my eye.
-Bob
On Wed, Apr 20, 2011 at 11:01 PM, Raj vu2...@gmail.com wrote:
This looks good!
http://www.ablogtoread.com/citizen-satellite-eco-drive-watch-gets-time-from-space/
At 21-04-2011, you
The 3325 has an option for high voltage output from DC to 1MHz (up to 40
volts peak to peak at 40mA) with option 2 which can be handy sometimes.
Also, I remember the 3325B has an upgraded attenuator stack to improve
reliability as compared to the 3325A like I have.Can anybody chime in on
of the
card.
-Bob
On Wed, Feb 23, 2011 at 9:12 AM, Joe S. Borovetz wa5...@tapr.org wrote:
On 10/30/2010 11:58 PM, Robert Darlington wrote:
I finally got around to asking this question..I have been working on my
4501 timeserver for the past year.
Bought the parts a year ago...finally put things
I tested it before posting and it did work for me. I'm no longer setup for
doing this again though. Your CF card should be able to boot (at least
partially) in your PC assuming you're using a IDE - CF adapter like I
had. Try burning the image again. If it still doesn't work and if another
I've dealt with par-metal.com in the past. Extremely high quality, great
prices, lead times that annoy me. I needed a 4U enclosure overnighted.
They laughed at me. I ended up buying a Budd enclosure from Newark. They
seem like a mom and pop shop that will do custom work including painting and
to hit
the reply key before mailing the whole list about our business dealings,
m'kay?
-Bob
On Sun, Feb 6, 2011 at 5:13 AM, David C. Partridge
david.partri...@perdrix.co.uk wrote:
Please could Hadley Allhands, and Robert Darlington please check their mail
(including spam folders) for mail from
Hi guys,
With all respect (as much as I can muster on a Friday night that I'm sitting
at home instead of having fun), can we push the SNR ratio in the right
direction?
Thanks,
Bob
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Hi guys,
Today I received a shiny new (to me anyway) FRS-C Rb from one of the usual
sellers in China. It locked after roughly 2 minutes. Comparing it to my
Thunderbolt I saw that it was running at a very slightly different rate. I
adjusted the c-field pot and made it slightly better but I ran
I bought one just yesterday on eBay for $58 USD shipped from China to
replace one I broke. I did some surgery to change the behavior of the lock
lamp (I wanted it to light when locked, not when unlocked). A week later I
went to document what I did for the list members and walked across the
Did you guys see this one yet?
http://www.engadget.com/2011/01/20/faa-warns-of-ongoing-gps-issues-in-southeastern-us-due-to-defens/
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Lead is slightly radioactive. Presumably the person building the device
would either source the right isotope or just use an existing vapor
container from an old unit. Of course if it was totally scratch built, I'd
still just buy the right isotope.
-Bob
On Thu, Jan 13, 2011 at 4:18 PM, Rick
And for those of us that really hate being teased into doing a google search
when it's just as easy to paste the link, here's the link:
http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm
Here's the main page where the above frequency standard is listed:
Denatured alcohol is available at Home Depot in the States and most hardware
stores.
Also, what you say about the 50/50 mix of isopro and water is exactly why I
tend to reach for the 70% stuff first. It dissolves the bulk of the gunk
including the stuff not soluble in alcohol but that is soluble
I particularly like the Box Enclosures brand extruded aluminum boxes. The
series 2 and series 3 enclosures take 100mm wide Eurocard boards perfectly.
They are very easy to machine if you want D holes for BNC connectors, etc.
They're also extremely high quality and cheap! Newark sells them and I
Hi guys,
I randomly stumbled upon this video on the Make website:
http://blog.makezine.com/archive/2010/12/how_a_quartz_watch_works.html
There is a good amount of detail presented and I enjoyed the short video
quite a bit. Hope you do too.
-Bob
___
Right now my favorite watch is a $13.99 U.S. Time military style watch
that was made in China. I replaced the band with one that I like better so
I guess maybe it's worth $14.99 now. It keeps pretty good time (better than
Harrison's clocks but that's not really hard with a quartz oscillator),
Hi guys,
I live in New Mexico which means my LORAN receiver is pretty much a boat
anchor. This is what the thing looks like:
http://www.recycledgoods.com/products/Austron-2000C-Loran-C-Precision-Time-and-Frequency-Receiver.html
I'm offering it to anybody in the continental USA that can make use
Ah, good point. I believe this is the case too.I have a taker now and
am waiting to hear back (I pointed this out to him).
-Bob
On Wed, Dec 22, 2010 at 9:44 AM, Poul-Henning Kamp p...@phk.freebsd.dkwrote:
In message aanlktikquulvwrggbug1-=bwcqrchknjrrzeg_8wh...@mail.gmail.com,
Robe
rt
]on
Behalf Of Robert Darlington
Sent: Wednesday, December 22, 2010 11:33 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] free: Astron 2000C LORAN receiver
Hi guys,
I live in New Mexico which means my LORAN receiver is pretty much a boat
anchor. This is what
I don't believe anybody is speaking to perceived value as much as historical
market cost at various times over the years. I paid $200 for my 5370B last
year and it's in superb condition and well inside factory specs. There is
no way I'd sell it though. My guess is Bob C and most of us perceive
Not only that, but by stamping them out you could go from producing one
every other week or so to 1000 a day.
-Bob
On Mon, Dec 20, 2010 at 5:07 PM, J. Forster j...@quik.com wrote:
Correxct, I believe.
There is a little known story about the cavity magnetron:
The one Tizzard brought over
Any particular bandwidth requirement? Storage or computer interface?
Analog? Digital? What's your price range?
On Sat, Dec 11, 2010 at 6:25 PM, Mark Sims hol...@hotmail.com wrote:
A little off topic, but needed for a time-nutty application: 4 channel
scope with isolated inputs that is
Just an FYI guys, I'm pretty sure the 3rd circuit down on the Wenzel page is
identical to the input circuit for the TAPR TADD-2 frequency divider. The
TADD-2 adds a transformer and load resistor. Schematic is in the manual
here:
http://www.tapr.org/~n8ur/TADD-2_Manual.pdf
-Bob
On Wed, Dec 8,
Are you running ntp, and if so, did you kill the old drift file?
On Dec 2, 2010 8:18 PM, Mike S mi...@flatsurface.com wrote:
Anyone familiar with Linux kernel timekeeping?
I've recently upgraded a server to an AMD 890FX/SB850 based motherboard.
After doing so, I observed a large (in time-nut
need to do? What precision is required and how many clients
will
you be serving. For most normal uses you don't need a special purpose
server system. A $600 notebook PC and any GPS unit with a serial
connection and a copy of Linux or BSD.
On Mon, Nov 29, 2010 at 11:36 AM, Robert Darlington
with Meinberg.
Several versions to choose from, reliable, and priced well.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Robert Darlington
Sent: 30 November 2010 2:47 PM
To: Discussion of precise time and frequency
Er, rather, add 7 hours. You get the idea.
On Tue, Nov 30, 2010 at 6:10 PM, Robert Darlington rdarling...@gmail.comwrote:
Hi Greg (and everyone!)
The environment will be dusty and hot and cold and hot and cold... There
will be air conditioning but probably not much in the way of filtering
That's exactly what we've done in the past (setting it when on the network
and letting the clock do what it wants) and that's fine. The actual time
isn't as important as the agreement on what time it is. This is certainly
the cheaper way to go and is becoming a viable option.
I agree about the
That won't work in my application. I can't run anything on any server but
one I provide specifically for time, which is why I'm looking at dedicated
time servers. Believe me when I say this crossed my mind and was crossed
off the list. Just about every system is MS Windows based which means
There are sometimes delays up to 30 minutes or so due to processing of
sensor data till it makes it into my system which is also way out in the
field. Imagine a shipping pallet full of equipment that gets air dropped
into the middle of nowhere. That IS my network, and it has no connection to
Hi guys,
I'm looking to buy an NTP server for a field deployable server system. I
currently have a Symmetricom SyncServer S250 which does more than I need. I
am considering buying an S200 (same as the S250 but without the ability to
connect to an external frequency standard). My gut feeling is
this thing
to be better than it was out of the box!
-Bob
On Fri, Nov 26, 2010 at 12:41 PM, Dave hartzell hartz...@gmail.com wrote:
On Fri, Nov 26, 2010 at 6:41 AM, Robert Darlington rdarling...@gmail.com
wrote:
I keep it in a styrofoam beer cooler surrounded with bottled water in a
draft free
Got a URL handy? I'm interested in looking at a data sheet or two but
couldn't find anything with Google.
-Bob
On Thu, Nov 25, 2010 at 4:33 PM, Murray Greenman
murray.green...@rakon.comwrote:
I could tell you but...
There's a lot of interesting IP in these little guys!
Regards,
Murray
Be careful about giving legal advice. These are not legal where I live.
Making explosives in any quantity is legal at a federal level in all 50
states without any kind of license but those darn states and cities make
laws to restrict that. Mixing tannerite turns it into a federally, state,
and
Hi Jim,
This doesnt' look right to me. I'm getting roughly 2.3 inches at 2400 feet
is 0.08 miliradians.0.01 miliradians (1*10^-5 radians) at 2400 feet is
0.288 inches (roughly 30 caliber). Wikipedia says that to resolve 0.01
miliradians you need:
R (in radians) = lambda / diameter (of
Hi Alan,
My $200 Tek 7854 mainframe with the 7S11/7T11 combo take my old scope up
high enough to look at 13-14GHz repetitive signals. I don't think it can
take a screen shot or do much if any analysis with these plugins though but
they're still handy for a lot of things. I love the digital
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