"Framing error" or "override" sounds like a parity or stop bit issues. Have you
changed those at all? 7E2 often works when 8N1 is specified.
> On Apr 22, 2014, at 10:34, "Collins, Graham" wrote:
>
> Thank you Thomas,
>
> I have that document but it wasn't of much help. I spent much time over
Interesting idea. It might be an interesting experiment to couple a large
number of inexpensive xtals to see how it impacts effects such as sudden
changes in a single xtal.
With sufficient monitoring of each one, you could even tune the coupling to
amplify/attenuate the results of the 'good' a
Lot's of connectors change specification @ 18Ghz or are not rated bast
18Ghz.
On Tue, Feb 25, 2014 at 11:55 PM, Hal Murray wrote:
>
> jim...@earthlink.net said:
> > there's a BIG jump in cost when you cross that 18GHz boundary line.
>
> What's magic about 18 GHz? Why not 16 or 20?
>
>
> --
>
There are some good alternatives to krytrons. Just don't expect to be able to
afford or export them. ;)
> On Dec 26, 2013, at 21:26, Bob Camp wrote:
>
> Hi
>
> Unless you want run for < 1 second, that rules out a Krytron.
>
> Length of operation also impacts some of the other implementatio
TV video distribution amps work very nicely. Even better if you open them
up and change the matching from 75ohm to 50. :)
Bob
On Thu, Sep 26, 2013 at 3:19 PM, Glenn Little WB4UIV <
glennmaill...@bellsouth.net> wrote:
> Would an analog video distribution amplifier work?
> These are available ch
e gate in this case will move the pulse by 100MS.
>
> On Sat, Sep 7, 2013 at 9:22 PM, Bob Bownes wrote:
>> 100ms is an awful lot of 'inverter gates'!
>>
>> On Sep 7, 2013, at 23:15, Chris Albertson wrote:
>>
>>> With RS232 the data uses negative
100ms is an awful lot of 'inverter gates'!
On Sep 7, 2013, at 23:15, Chris Albertson wrote:
> With RS232 the data uses negative logic (low is "1") and the control
> lines use positive logic (high is "1".) That is, a control line is
> "asserted" when it is at logic 0, a positive voltage.
>
>
They also make nice panadapters...
On Aug 5, 2013, at 17:25, Lizeth Norman wrote:
> Gents,
> These things are limited in usefulness by themselves. They need decent
> filtering and preamps for any weak signal stuff.
> If all you want to do receive the local channels, then these are for you!
> Nor
And there is your product. The GPSDO derived 44.1 kHz reference!
I only ask for a 10% royalty.:)
On Jun 19, 2013, at 20:54, Tom Knox wrote:
> I wonder what is the best way to obtain 44.1KHz from a 5-10MHz reference.
>
> Thomas Knox
>
>
>
>> Date: Wed, 19 Jun 2013 15:14:17 -0600
>> From: ala
For making a blinking LEDs, it is hard to beat a 74LS74. However, a PIC, is
probably less expensive! :)
On May 26, 2013, at 13:33, Bob Camp wrote:
> Hi
>
> If you head over to the auction sites and do a bit of creative digging /
> bidding, the Arduino clones are amazingly cheap. They easily b
I use the Arduino as a rapid prototype development platform. I build the
application and the hardware on the Arduino and then move the cpu to a
standalone board. You can also use the Arduino as a programmer much like
someone else suggested.
Bob
On May 26, 2013, at 13:19, Chris Albertson wrot
I suspect Linux based systems are a few sigma away from the original goal of a
cheap pic choice...:)
But to get back to the original point, you can get samples of most of the PIC
chips from MicroChip for free. I think the limit is 3 per week. Or 30 days, I
don't remember.
Bob
On May 25, 2013,
Oh, you can do it, but you really need to know what you're doing.
As the prev poster said, it depends on what you are doing. Simple compiles are
straightforward, autoconf if its a bit more complex, use Xcode.
If you are doing work on an app that needs a GUI, Xcode makes it easy.
On May 20, 2
We should plan a Time-Nuts BOF lunch after the next flea.
Saw little TN gear @ Dayton save one Efretom RBI time base for $1800 and a few
10811s of dubious quality for $50 ea. the dents put me off gambling on one
since I was given or the afternoon before! ;)
On May 19, 2013, at 21:50, paul swed
On Mar 27, 2013, at 22:54, Jim Lux wrote:
> On 3/27/13 3:20 PM, Bob Camp wrote:
>
>
> Of course, for the more mechanically inclined.. what about a big flywheel
> driving an alternator. You might be able to rejigger a car alternator. I
> don't recall how many poles they have..
A motor dri
Used is definitely the way to go. My stereo zoom scope was $15!
On Feb 8, 2013, at 16:12, "DaveH" wrote:
> Check to see if there are any tech auctions in your area.
>
> Picked up a nice scope with stand and illuminator for $90 in the Seattle
> area.
>
> Dave
>
>> -Original Message-
>>
There are some well documented issues with timing and USB that have been
rehashed here a few times.
On Sun, Jan 27, 2013 at 1:48 PM, Jim Lux wrote:
> On 1/27/13 9:30 AM, Peter Gottlieb wrote:
>
>> At work we simply use multi port serial cards (*no* USB intermediary) or
>> Ethernet to serial ada
The problem with the Ethernet adapters is the lack of software support on the
OS side. I'd have gone to that long ago if I could point any bit if software at
a serial port that was actually on a terminal server out on the ip fabric.
On Jan 27, 2013, at 12:30, Peter Gottlieb wrote:
> At work w
That is exactly what mine does when it has marginal power on the 48v input. You
may find that 50-52vdc works.
On Jan 13, 2013, at 0:14, Joseph Gray wrote:
> After many years of faithful service, my Z3801A has stopped working.
> It seems to be going through a loop at powerup. All of the LEDs bl
You can generally get free samples of moderate cost from a vendors website.
Mini-circuits and Hittite are the notable exceptions.
On Jan 5, 2013, at 20:42, Lizeth Norman wrote:
> Gentlemen:
> My experience is that if you place an order of some substance,
> assistance will be forthcoming.
> Som
Paul Wade built a board recently to do just this. www.w1ghz.org.
Bob
On Fri, Jan 4, 2013 at 12:16 PM, Chris Albertson
wrote:
> THis is exactly what they are talking about the 74HC390 can do over
> 50MHz and costs abut 30 cents. You don't need ECL or anything so
> exotic the 30 cent part will w
I've only been following this thread distantly, however, I have been playing
with arduinos quite a bit of late.
If you wanted to incorporate one as the processor of choice in a new design,
the cost is quite low, under $4.00us for the processor in quantity one. I've
used one in a new design in
It all depends on what clock your talking about. Any given PC probably has more
than one oscillator onboard.
Generally there will be one for the CPU, one for the display circuitry, and
probably one for the real time clock.
Presuming you are talking about the CPU clock, it should be fairly
strai
You can also overdrive a mmic and get good results. That is what I'm using as
the oscillator for my 1.296 GHz beacon.
Bob
On Nov 27, 2012, at 15:45, Ed Palmer wrote:
> Hi Don,
>
> Yes, I've heard of SRDs. I think every Rb standard uses them. I recently
> purchased a YIG Multiplier that in
+1 please!
On Nov 19, 2012, at 16:23, mcqu...@sonic.net wrote:
>>
>> "MINI-TIC" for DMTD work
>>
>>
>> Hi Everyone!
>>
>> I've been testing a Miniature 2 channel TIC that Bert Kehren and Juerg
>> Koegel
>> and Richard Mc Corkle have designed.
>
>
> Please add my name to the list!
> Thank yo
By the way, you need not use a USB serial adapter. Several folks are doing PPS
on the gpio pins.
Take a look here
https://github.com/davidk/adafruit-raspberrypi-linux-pps
And here
http://www.frambozenbier.org/index.php/raspi-community-news/4439-george-lu-on-ntp-pps
On Oct 16, 2012, at 22:03
Boy am I glad I didn't go to either!
On Oct 15, 2012, at 17:30, "David I. Emery" wrote:
>In a mad moment at the NEARFest flea this weekend I grabbed
> a 5061A for $250. Poor thing was getting wet in the rain and needed
> a home. Really really heavy to carry to the car, however...
>
>
Comments inline.
On Oct 5, 2012, at 18:26, Hal Murray wrote:
>
> bow...@gmail.com said:
>> The problem is that they start in sync and over the course of a day drift
>> that far apart despite having NTP running. We're not sure why NTP isn't
>> correcting it along the way. Though at this point,
David,
The problem is that they start in sync and over the course of a day drift that
far apart despite having NTP running. We're not sure why NTP isn't correcting
it along the way. Though at this point, we are looking at a firmware bug.
Thanks!
Bob
On Oct 5, 2012, at 12:30 AM, "David J Taylor
On Thu, Oct 4, 2012 at 1:31 PM, Attila Kinali wrote:
> On Thu, 4 Oct 2012 13:04:27 -0400
> Bob Bownes wrote:
>
> > The problem stems from one of the two (identical) machines drifting off
> by
> > 60-70 seconds per day. So a few ms here and there are ok.
>
> Is i
On Thu, Oct 4, 2012 at 12:46 PM, Hal Murray wrote:
>
> bow...@gmail.com said:
> > Due to reasons I really can't go into, a systems user is concerned with
> the
> > displacement of two servers from the same pair of stratum 2 NTP servers.
>
>
> Assuming you are running the standard ntpd... It i
It had to happen eventually. Time Nut interest overlapped with $DAY_JOB.
Due to reasons I really can't go into, a systems user is concerned with the
displacement of two servers from the same pair of stratum 2 NTP servers.
I'm convinced that it really isn an issue as long as the two systems i
BWIWY (back when I was young) we needed a dummy load for a supercomputer (think
Cray YMP size) that drew many many kw.
Our test load was about 250' of 3/4" copper tubing coiled at about 12" dia and
1" spacing. The load was varied by changing where the + and - leads were bolted
onto the coil wi
Many folks.
The paranoid tinfoil hat crowd
Folks who are concerned that law enforcement has placed a GPS tracker on their
car.
Truckers avoiding log enforcement
Truckers who want to sleep rather than drive.
Ambulance drivers who want to sleep but claim to have been held up at hospital.
Em
I run an XP VM in either VirtualBox (under linux) or Parallels (on my mac)
to do the same thing. Works like a charm.
Bob
On Thu, Sep 27, 2012 at 11:00 AM, paul swed wrote:
> My I like your approach.
> Now I have to go see what all of this might cost.
> On vmware are you running esxi??
> Suspec
It isn't an article. It's an 11 page ad. Notice there are no magazine page
footers and the formatting is not the same as articles. Most 'reputable'
publications would now put 'Advertisement' at the bottom of each page.
Bob
On Fri, Sep 21, 2012 at 9:35 AM, Rob Kimberley
wrote:
> I understand fu
The local sandwich shop that I frequent recently switched to LED lighting. When
I walk up to the counter I can see the flicker when people's hands are moving.
The same applies for LED taillights when a vehicle is moving as well as newer
LED tower lighting.
Bob
On Sep 18, 2012, at 13:15, Hal
AllElectronics has has some ~24", 24 white LED white strips available for
about $7 of late. I purchased a bunch and stick them under the lips of the
shelves in my office/lab and powered them with an old laptop brick I had
sitting about. Look great, wickedly cheap, and very effective, especially
at
Agreed. Just pointing out there isn't a big porting effort to get ntpd itself
up and running.
On Aug 19, 2012, at 22:24, Chris Albertson wrote:
> On Sun, Aug 19, 2012 at 6:49 PM, bownes wrote:
>
>> It comes w ntp out of the box if you run fedora.
>>
>>
>
AFIK there are no
> neat counters like on a 45xx board. You also don't have a well tuned ntp
> since it's LInux.
>
> Bob
>
> On Aug 19, 2012, at 1:31 PM, Chris Albertson
> wrote:
>
>> On Sun, Aug 19, 2012 at 10:16 AM, bownes wrote:
>>
>>&
Why not just use a raspberry pi? Uses a whole 2w at idle. Ntp might bump that
to 2.01.
On Aug 19, 2012, at 13:06, Chris Albertson wrote:
> This sounds like a newer version of the board I use. The thing to check
> is if the CPU heat sink has a fan or not. Having no fan indicates that
If you are looking to graph long running data and provide rolled up
summaries, the combination of MRTG and RRDtool is pretty hard to beat. Can
work with pretty much anything on the back end. And it's the industry
standard for network monitoring.
http://oss.oetiker.ch/mrtg/doc/mrtg.en.html
Or some
Not only do i remember the frozen yellow hose, I still have my vampire tap
drill/tool...now finding it may be another matter...:)
On Jul 30, 2012, at 18:53, Chris Albertson wrote:
> On Mon, Jul 30, 2012 at 12:41 PM, Sylvain Munaut <246...@gmail.com> wrote:
>>> 10 mHz
>>
>> Please use MHz .
Old ThinNet was coax, as was ThickNet before it. Only in the Modern Age
have they been using twisted pair. :)
On Mon, Jul 30, 2012 at 3:41 PM, Sylvain Munaut <246...@gmail.com> wrote:
> > 10 mHz
>
> Please use MHz ...
>
> 10 mHz is 10 milli-hertz, ie 1 cycle every 10 second.
>
>
> An yes, ethe
Interesting that they use jammers. The guys on the ambulances just wrap the
antennas with the foil from burger wrappers or the like.
On Jul 28, 2012, at 0:34, Jim Lux wrote:
> On 7/27/12 6:42 PM, Brian, WA1ZMS wrote:
>> Does anyone know if there is ANY recent active Lightsquared testing taki
The pulse from my T-Bolt is on the order of 1uS wide. I captured it on the
digital scope for posterity and future reference.
http://www.fastbobs.com/pictures/1pps.jpg
Bob
On Mon, Jul 23, 2012 at 12:58 PM, Chris Albertson wrote:
> I wass fooled by this too. My analog scope does not sync on at
As someone pointed out, it is dependent on where you are, as well as a number
of other factors.
I've got a nice chunk of concrete tied to bedrock about 10' below the surface
with a thermal variation that is below the threshold of the thermometer i have
there.
Since I need to put something e
I've oft considered bolting one to the cement wall in my basement, which is a
very nice, very stable 57deg F just to see how it holds.
On Jul 13, 2012, at 14:36, "Don Latham" wrote:
> You can get one of these at any large truck stop :-)
> Don
>
> Peter Gottlieb
> Now I
>> suppose one cou
I understand this event perfectly. Our feline owners leave us presents on an
occasional basis. Usually we find them straight away, but when we can't, ninja
nose wife takes over.
For some reason, however, they tend to only leave the back half of the dead
rabbit. My spouse says it is because the
I get my tabbed batteries from Batteries America. Decent prices and good
quality.
On Jul 1, 2012, at 19:41, Dan Rae wrote:
> All this discussion of the excellence of these Rb units reminds me that
> another cell must have died in my battery pack since the slightest glitch in
> the power h
The fact that a clause is not enforceable doesn't prevent it from being put
in contracts to scare non lawyers. I had my personal attorney, who happens
to work for a firm that has another atty that specializes in employee/union
side labor law, review one of my employment contracts once. His opinion
I buy them on ebay. Usually <$30+S&H for 32 ports. 64 port units are harder
to find as are self booting units. (Most xylogics boot from the network,
which is easy enough to make work)
On Tue, May 22, 2012 at 11:46 AM, Chris Albertson wrote:
> Terminal servers are simple boxes. You just Telne
I use the lantronix serial to ethernet converters and I use Xylogix
terminal servers. I've not had much luck getting either to work with
classic windows based applications, though I'd love to do so as I have a
plethora of both.
I use a 64 port xylogix in the basement to connect to all the serial p
>
> 2) - an interesting experiment in brain filtering is to stand near a
> broadband noise source (fan or air conditioner or radio with someone
> talking) and talk with someone. Have a recorder going and record your
> conversation. You can understand the other person perfectly while face to
> face
WIWAUG (when I was an under grad), it was explained to me that the seismometers
were log scale and basically don't clip. When you get into a big event, the
last few decimal places just don't matter.
We also used differential GPS across known fault lines to measure slip both
over time and durin
You know, I have a 1Gig Tek digital (DSA602 with 11A72/11A71,11A34) on my
bench and a 1G Tek analog (7934). The 7934 never gets fired up anymore. I
really should reclaim the space.
On Mon, Apr 16, 2012 at 11:41 AM, Tom Knox wrote:
>
> I was speaking several years ago to someone at Tektronix and
Yup. Once a month. Good sized parking lot plus four or five floors of a parking
garage. Sounds like there were enough T-N there to have had a gathering! :)
I too looked at all the loran units and decided to pass.
III
On Apr 15, 2012, at 17:45, "Don Latham" wrote:
> Oh, I can't stand it...f
I suspect that would make the multipath problem even worse.
On Wed, Apr 11, 2012 at 4:06 PM, Andrea Baldoni wrote:
> On Wed, Apr 11, 2012 at 10:19:40AM -0400, Bob Bownes wrote:
>
> > I do like the optical isolation suggestion. While less than optimal,
> > perhaps the easiest
Don't forget to tighten the fiber connectors and correct for the length of
the fiber or you'll be off by 60ns! ;)
On Wed, Apr 11, 2012 at 1:17 PM, Chris Albertson
wrote:
> On Wed, Apr 11, 2012 at 7:19 AM, Bob Bownes wrote:
>
> > The issue is that this treats the t'bo
I do like the optical isolation suggestion. While less than optimal,
perhaps the easiest solution is not to put the isolation between the t'bolt
and the antenna, but to put the isolation between the t'bolt and the
distribution amplifier.
For example, locate the antenna as suggested. Locate the t'b
I find it very curious that the 'master clock' computer is very clearly a
desktop class machine rather than something in a sever rack with controlled
environmentals, power, etc.
Bob
On Fri, Mar 30, 2012 at 4:03 PM, Javier Serrano <
javier.serrano.par...@gmail.com> wrote:
> On Fri, Mar 30, 2012
What, if any, are the phase changes?
On Mon, Mar 12, 2012 at 5:39 PM, Chuck Forsberg WA7KGX N2469R
wrote:
>
>
> On 03/10/2012 04:44 PM, Mark Spencer wrote:
>
>> I've done this as well.
>>
>> I daisy chained several pieces of hp and marconi gear together that all
>> had an approx 1k ohm input imp
There are 3 5061's listed on ebay at the moment. Anyone know anything about
them?
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Wow. I just save it to an nfs share on the NAS. Then I can get to it from
anywhere in the house/world...
Have not seen anyone use kermit or zmodem orsplit or rar or uuencode for a long
long time.
On Feb 21, 2012, at 18:59, Chris Albertson wrote:
> On Tue, Feb 21, 2012 at 3:47 PM, Robert
Think trying to measure the distance between two distant moving spacecraft
with no idea what the gravitational gradient is between them or the ability
to measure the doppler.
Unless, of course, Bill is doing much different things than he was when I
last ran into him. :)
On Mon, Feb 20, 2012 at
t;
> Any interest?
> Make me an offer and it's yours after I get time to test is out.
>
>
> -Brian, WA1ZMS
>
> On Feb 17, 2012, at 4:56 PM, bownes wrote:
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
>
Yup. Between the 1ghz 7000 series, the DSA602 w 1Ghz plug ins, and the 2236
portable I don't expect I'll ever need to buy another scope.
On Feb 17, 2012, at 16:36, "J. Forster" wrote:
> Tek went into the toilet when Danaher bought them out.
>
> I bought a TDS1002 and could not even get the
I was a Tek aficionado for many many years. My first personal scope was a
tek, my first work scope was a Tek. I've owned at least half a dozen over
the decades. The three scopes I own today are Tek. But everything else on
my lab bench has changed over to HP (with the exception of a couple of
TM5006
There was a system in NJ with over 3000 ps2s in a supercomputer config.
The financial industry's idea of high cost is a bit different than most.
The price of your real time ticker feed from the exchanges is directly
proportional to the associated network latency due to speed of light.
Bob
Just for completeness sake, here is a screen capture off of my DSA-602 of
the 1pps. Note that the trace starts 500ns _before_ the 1pps triggers the
capture. Ah the wonders of digital sampling.
http://www.fastbobs.com/pictures/1pps.jpg
Also as a pdf
http://www.fastbobs.com/pictures/1pps.pdf
Bob
If someone sends me the manual, I have a location I can host it.
Bob
On Wed, Feb 1, 2012 at 12:38 PM, Larry McDavid wrote:
> I wish Rob Kimberley's email address had been preserved so I could also
> ask for this manual pdf file without adding traffic to TimeNuts.
>
> Chris Albertson offered 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 reference
if anyone is looking for a 5370, there is one on ebay that is currently
listed for $29+shipping...
http://www.ebay.com/itm/HP-Agilent-5370A-Universal-Time-Interval-Counter-/160714650831?pt=LH_DefaultDomain_0&hash=item256b56f4cf
No financial interest, but that's a lot less than I paid for mine! ;)
On Jan 13, 2012, at 17:51, Chris Albertson wrote:
>
>
> I'm surprised that no one has built a GPIB controller from a uP.
> Electrically the GPIB is simple and slow by modern standards.
>
Several have. That is basically what the prologix is. There is another one you
see on eBay quite oft
When you are thinking about replacing GPS receivers, don't forget about
every police car, ambulance, fire truck and most of the tractor trailer's
in the US...The latter don't need timing down to the second, but the first
three use it to well under a minute.
One of the first things you learn when o
--
>
>
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of bownes
> Sent: Friday, January 06, 2012 6:49 PM
> To: Discussion of precise time and frequency measurement
>
Step one...is the antenna in a location where it can see they sky?
Sorry if it is a stupid question but you already said it was plugged in. :)
On Jan 6, 2012, at 19:24, "Don Lewis" wrote:
> Can someone please give me some pointers (my first time with a GPS module).
>
>
>
> A little hand-ho
It is one of those cost/benefit calculations. The cost of sorting the real
gifts from the commerce <$100 labeled as gift probably wouldn't pay for itself.
It is, of course illegal. The question is are we better off changing the
enforcement or the law. Not to mention the cost of the latter.
Ma
Imagine a 3d map in which colour represents phase or frequency and Z
displacement of the sample point represents voltage.
Would make for a nice animation anyway.
On Dec 30, 2011, at 17:47, shali...@gmail.com wrote:
> The problem is that while the frequency is going to be pretty much the sam
Those bolts would be whitworth.
On Dec 15, 2011, at 14:43, "Steve ." wrote:
> The laboratory where i work obviously reports results using the SI metric
> system. There is one exception though, and that is the energy side,
> specifically calorimetry. At first glance the calorimeters appear to
What's metric or Common Measure about seconds? ;)
Bob
On Tue, Dec 13, 2011 at 11:47 AM, Don Latham wrote:
> Ah yes, God's units as revealed by the French. :-)my mistake
> Don
>
> Jim Palfreyman
>> Gentlemen, gentlemen and gentlemen!
>>
>> We are time-nuts. Accuracy is paramount. We are scientist
Paul Wade did a paper on 10Mhz GPSDO filtering for Microwave Update in
October. It is in the proceedings. I don't know if it is available
elsewhere.
Bob
On Mon, Dec 12, 2011 at 9:17 PM, wrote:
> I think you would want to avoid crystal filters due to microphonics.
>
> I've found building good L
Ayup. For some definition of precision at least. :)
On Wed, Dec 7, 2011 at 11:26 AM, Jim Lux wrote:
> On 12/7/11 8:18 AM, Bob Bownes wrote:
>>
>> Much to my amazement, this morning I discovered that the State of New
>> York, where I live, has their own Metrology lab less t
Much to my amazement, this morning I discovered that the State of New
York, where I live, has their own Metrology lab less than a mile from
my office. And are building a new lab.
http://alloveralbany.com/archive/2011/12/07/that-building-going-up-on-the-state-campus-along-w#more
And to my amazemen
Keep in mind that a common view or LOS light method will have a
problem with the variability of the medium density along the path
being unknown.
You could do it in a vacuum however.
I come back to the base question of 'since the speed of light varies
depending on the medium, does the speed of the
On Oct 8, 2011, at 18:27, Hal Murray wrote:
>
>> I find that at JPL (and I assume others have found this too) that we'll go
>> off and reinvent the wheel (maybe because we're working in parallel
>> ignorance) for something.
>
> I remember a story from many years ago. I think the context w
On Tue, Oct 4, 2011 at 11:03 AM, Kevin Rosenberg wrote:
>
> What I haven't decided is whether to have my son use the 34401A and GPIB
> polling via a Prologix adapter versus a simple MCU firmware using a 2.5V
> reference voltage and a 10-12 bit ADC and outputs the ADC result either
> once a second,
Exactly. The narrower the filter, the more it will cost. In general.
On Fri, Sep 30, 2011 at 11:10 AM, Tom Holmes wrote:
> Sticking with the intent to keep this non-political, what good is a filter
> if the offending signal is within the necessary passband?
>
> Tom Holmes, N8ZM
> Tipp City, OH
Right. The fixed location apps are not all that hard. But the mobile
ones are going to be a big problem.
Not to mention getting them certified for the application. The GPS you
have in your car is not certified for life critical applications. The
one I have in my ambulance is. And let's not even ge
As always, the answer is 'it depends'. :)
Solid rock? Liquid rock? Gaseous rock? Plasma? :)
Wavelength?
A nice light rock like calcite it probably isn't too tough to measure.
Si02 is pretty easy too, I'm sure.
For classic basaltic or feldspathic rocks, I suspect you are going to
need something
The simplest method of all would be to put one on the X axis and one
on the Y axis of an o-scope.
What levels of precision/accuracy are you looking for?
On Wed, Sep 7, 2011 at 11:36 PM, Ilja Gerhardt wrote:
> Hi time nuts -
>
> I am new to the list and have a trivial question on the comparison o
I'd love to find a Smiths analogue clock to match the gauges in the dash of my
old British car!
On Jul 16, 2011, at 10:56, Michael Poulos wrote:
> On 7/10/2011 5:04 AM, Javier Herrero wrote:
>> My car has an interior look similar to this:
>> http://upload.wikimedia.org/wikipedia/commons/thum
There are a number of kits available on ebay and other places.
Bob
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My educated guess is that they expected to sell these to telcos, who
traditionally run everything in a central office on -48v and running off of ac
was an afterthought.
On Jul 9, 2011, at 9:43, Marco IK1ODO wrote:
> Hello group,
>
> after many years (about 12, I think) of faithful continuo
Guess I'm an oddball, I have my choice of about a dozen wrist bourn time pieces
from the dresser.
Hardly the best, but my favourite is a euro spec tag heurer chrono.
On Jul 8, 2011, at 11:37, Pete Lancashire wrote:
> I normally don't. Use to but one day it stopped working and never got
>
Nice summary:
“In the end, the laws of physics won out.”
On Thu, Jul 7, 2011 at 1:57 PM, Pete Lancashire wrote:
> http://www.gpsworld.com/gnss-system/news/final-report-fcc-working-group-lose-lightsquared-l-band-11848
>
> ___
> time-nuts mailing list --
A while ago I was asking if anyone had a dist amp for 10mhz and many
suggested looking for video distribution amps. (and a few offered up
real 50ohm 10mhz dist amps, and I thank you!)
To make a long story short, I found a set of 3 VideoTek VDA-16's in a
1U rack mount on ebay for the completely rea
That small hemispherical antenna could also have been 900mhz. I have one here @
home that is a combined gps/900mhz antenna from an ambulance tracking system.
On Jun 10, 2011, at 22:01, Hal Murray wrote:
>
> li...@rtty.us said:
>> There's an enormous amount of gear out there that gets timing
starting a design effort and
> ruling out all the likely solutions after it's started.
>
> Bob
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Bob Bownes
> Sent: Monday, May 16, 2011 11:56 AM
> To: Disc
I'll add that for some reason the discussion never morphed over to an
alternate list created just to discuss a counter project without
taking up bandwidth here. Not sure that there was enough interest.
Other Bob
On Mon, May 16, 2011 at 11:53 AM, Bob Camp wrote:
> Hi
>
> The polls ran for less t
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