Re: [time-nuts] Affordable PoE 6-digit time displays?

If you can snag something that will put out IRIG-B, there are lots of choices. I’m still hunting for something that will take NTP in and put IRIG out. There is probably someone doing it with a Pi or an Arduino. Bob > On Jun 14, 2018, at 21:38, Chris Howard wrote: > > Maybe not exactly,

Re: [time-nuts] Cheap jitter measurements

Find a nice used 5370/5371? :) There is a 5371 on ebay for $250 at the moment. On Tue, Apr 3, 2018 at 1:47 PM, Gary E. Miller wrote: > Time-nuts! > > With care I can measure GPS jitter on a RasPi to a bit over 300 nano sec > resolution. That is the smallest increment of the

Re: [time-nuts] Simple open source microcontroller solution to tune DDS needed

The digispark and digispark pro are also some nice <$15 development boards that are USB programmable, use the Arduino IDE or AVR compiler, and have just enough pins to be useful. On Wed, Dec 13, 2017 at 4:34 PM, jimlux wrote: > On 12/13/17 1:28 PM, Jerry Hancock wrote: >

Re: [time-nuts] Why discipline Rubidium oscillator?

Oops cat hit ‘send’ 5071’s I’ve seen for as low as about 9k, but usually in the 15-30 range. I don’t want to know what they are new. 5061’s can be had for under $1000. If you are very lucky, under $500. And once you have the standard, you need the counters. And other analysis tools...pretty

Re: [time-nuts] Why discipline Rubidium oscillator?

Cost of a cesium clock can go from less than you pay for a pair of doxco‘s to many tens of thousands. I think 5071’s are in > On Nov 20, 2017, at 23:50, Jerry Hancock wrote: > > I read up on the GPS L1/L2 and I think there is an L5. > > And when you say “on the market” the

Re: [time-nuts] Recommendation for cheap GBIP adapter for Linux

All GPIB to Ethernet adapters are not created equal. The NI GPIB-E is no longer supported for example, only the 100 & 1000. Which is very annoying to those that have one. Bob > On Nov 18, 2017, at 17:45, Bob kb8tq wrote: > > Hi > > Given all the nonsense with USB

Re: [time-nuts] Deaf Z3801

However, setting it to 23:59:59 Dec 12,2007 and leaving t alone for an hour or two seems to have done the trick. Thanks folks! Off to look at adev/pn of the $7 GPS boards I found with 10MHz out. Plots soon. Bob On Thu, Nov 16, 2017 at 12:26 PM, Bob Bownes <bow...@gmail.com> wrote:

Re: [time-nuts] Deaf Z3801

something. > > Bob > > > On Nov 16, 2017, at 11:24 AM, Bob Bownes <bow...@gmail.com> wrote: > > > > Thanks John. > > > > When I do this, I get the E-222 error indicating 'Data out of range'. > > > > Tried several formats, trailing';', etc

Re: [time-nuts] Deaf Z3801

> > Disconnect the GPS antenna downlead > > Reapply power to the GPS receiver > > Enter *:GPS:INIT:DATE 2017,01,01* (The only space is between DATE and > 2017) > > Reconnect the GPS antenna downlead and wait > > > John > > On November 14, 2017 at 10:43

[time-nuts] Deaf Z3801

I put my 3801 back in service the day before yesterday, or tried to. It’s been on the shelf for about a year (off). I powered it up, and while it sees a few sats, it will not acquire any. Changing to a known good antenna (off the NTP server) makes no difference. Anyone seen the behavior

Re: [time-nuts] Favorite counters (current production)?

That reminds me, should anyone have a schematic for an SR 830 walking amplifier, can you please get in touch with me. I have one that keeps eating voltage regulators. > On Nov 12, 2017, at 12:12, Dr. David Kirkby (Kirkby Microwave Ltd) > wrote: > >> On 10

[time-nuts] EIP 371 counter

I’m trying to put a EIP 371 into talk only mode but have zero documentation. Anyone know how to do so so that we can characterize a few oscillators? Thanks! Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Spectracom 9189 options

Folks, I've just acquired a spectracom 9189 and can see from the back that frequency, 1PPS, and IRIG were options. I presume these were add in boards, but thought I would check with you folks to see if anyone has any knowledge of the details. Thank! Bob

Re: [time-nuts] Distribution divider/amplifier for 10MHz GPSDO

Going on recollection. Now I’ll have to go look again. > On Oct 23, 2017, at 17:06, Jeremy Elson <jel...@gmail.com> wrote: > >> On Mon, Oct 23, 2017 at 1:49 PM, Bob Bownes <bow...@gmail.com> wrote: >> >> Will it work? Probably. Up to a point. >&g

Re: [time-nuts] Distribution divider/amplifier for 10MHz GPSDO

Will it work? Probably. Up to a point. Is is best practice? Not even close. Each device will (should?) generally present a 50Ω termination. In the case of instruments that provide their own ref output which is then looped back in, they may be different, but I don't recall seeing any that said

Re: [time-nuts] inexpensive, black box, GPS or NTP based TTL time capture?

A black box was asked for. Who cares what the OS inside is if you never need to mess with it. A surprising number of things run linux variants. Pretty much every smart phone is linux or unix... What is the output format you would like for your timestamp? disk, network file system, serial all can

Re: [time-nuts] inexpensive, black box, GPS or NTP based TTL time capture?

So, if I hear you right, you want a ttl input to trigger a timestamp, accurate to ms or µs to a file, correct? Bob On Wed, Oct 18, 2017 at 1:33 PM, Rob Seaman wrote: > Attila Kinali wrote: > > On Wed, 18 Oct 2017 08:47:58 -0600 > > Rob Seaman https://www.febo.com/cgi-bin/ >

Re: [time-nuts] Weird GPSDO behavior

How much jitter is there in the 8am number? If industrial, I could easily see the first shift coming in and all starting up at about the same time and shutting things off one by one as the jobs finish. But I would also expect it to not show up on weekends and/or holidays, etc. Same applies for

Re: [time-nuts] Better GPS coming to phones

So when can I have an app that turns on SA for the answers from my phone? ;) > On Sep 27, 2017, at 22:38, Bill Hawkins wrote: > > Sadly, it is not the phone users who will benefit. It is the advertisers > who use your location to send targeted ads. > > Time marches on. >

[time-nuts] 5061A behavior

So I powered up my trusty 5061A a week or two ago and it's been doing something interesting. Twice now, the CA lamp has gone out, but the alarm lamp has not lit. Resetting the logic brings it right back, but this seems like an improper failure mode. The alarm lamp is fine, so that's not the

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

Forgive my naivete, but if this is something as simple as the t'bolt adding a 10 bit number to a base date, could not the base date be changed in the PROM? (Presuming one can get to it, etc) Though I suspect that might not be all that simple of course. And I'm not taking mine apart to look. :)

[time-nuts] Of pi and ntp and irig

All the talk about building a pi with a touchscreen and NTP had me wondering when I went to the basement to pull a cable in a rack if anyone had spun up the IRIG-B code on a pi before I go and spin my wheels on it. Anyone? ___ time-nuts mailing list --

Re: [time-nuts] Power connectors continued

Keep in mind that there are a large variety of power pole connectors. I first encountered them in the cables and connectors used to recharge electric forklifts. Plenty big and can handle plenty of power. > On Jun 22, 2017, at 16:06, Chris Albertson wrote: > > I

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

; a "Cannon" connector. A good choice for that application IMHO. > > Mark Spencer > > m...@alignedsolutions.com > > > > On Jun 22, 2017, at 6:47 AM, Bob Bownes <bow...@gmail.com> wrote: > > > > Right Tool for the Job. > > > > I use barrel co

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

e PowerPoles, I like barrel connections, as with so many things it's > all about the application, choose the one that works for you. > > > >> On 22 Jun 2017 1:53 pm, "Bob Bownes" <bow...@gmail.com> wrote: >> >> Locking barrel connectors... >>

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

Locking barrel connectors... Aren't those called BNCs? ;) In one of my other lives, I see Power Poles used in a very life critical application. They are used to connect pads to Automatic External Defibrillators. In that application, the two poles (15A, red & white) are glued together rather

Re: [time-nuts] Looking for info on Trimble 16634-10

Pretty sure that connector is an off the shelf Amphenol part. If you can't find it, however, you can replace it with an off the shelf one that will fit in the same hole. (If your lucky, you can even re-use the pins.) The replacement will run you about $30-40 for the pair, chassis and plug.

Re: [time-nuts] Machining some aluminum help!

We also used helicoils in titanium frames of the supercomputer I used to work with. Meant we could use relatively standard fasteners without fear of falling. On a time nuts related note, I have a u blox GPS-1E that seems to be stuck spewing out in ublox format. With no development sw

Re: [time-nuts] Looking for a HP-58503 display

On a (slightly) related note, I have a Futaba DRO on my milling machine. The VFD display, as you mention, had grown very dark from being left on constantly. As it was a simple display with 6 7 segment digits, conversion to LED was actually pretty easy. It took about 4 hours one Sunday afternoon.

Re: [time-nuts] Line Frequeny Stablity

In college we had a Vax 11/730 that would freak out and reboot the same time every day. Turns out the culprit was the sync pulses put on the AC for synchronizing the classroom clocks...But it took DEC a few weeks to find the culprit. > On Apr 5, 2017, at 17:12, Bob kb8tq

Re: [time-nuts] Timelab, GPIB-USB-B in a VM

have to have it plugged in and enumerated first. > > Bob > > > From: Bob Bownes <bow...@gmail.com> > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Monday, March 27, 2017 8:03 PM > Subject: Re: [time-nuts] Timelab, GPIB-

Re: [time-nuts] Timelab, GPIB-USB-B in a VM

gt; From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob > > Bownes > > Sent: Monday, March 27, 2017 2:49 PM > > To: Discussion of precise time and frequency measurement > > Subject: [time-nuts] Timelab, GPIB-USB-B in a VM > > > > So I'm trying to ru

[time-nuts] Timelab, GPIB-USB-B in a VM

So I'm trying to run timelab in a windows 7 VM with a GPIB-USB-B interface. Anyone ever tried such a thing? The NI explorer sees the interface but nothing else does. Pointers welcome! Data on a bunch of oscillators as soon as I get it to work...:) Thanks, Bob

Re: [time-nuts] Time Dilation tinkering

It's not getting one past the airport authorities that's the issue. It's getting one that's powered up past them. ;) Written from about 10,000'. :) > On Mar 22, 2017, at 20:15, Tom Van Baak wrote: > > Chris Albertson wrote: >> Why drive up a mountain? > > "Because it's

Re: [time-nuts] Antique precision timing device without electronics

Don't forget, seawater is the return path... > On Mar 17, 2017, at 18:04, Hal Murray wrote: > > > e...@scace.org said: >> Frequencies around 15 Hz were common on early 20th century cables, >> depending on the degree of success in compensating for the inherent >>

Re: [time-nuts] Bye-Bye Crystals

not to mention +/- a few hundred ppm is not a big deal. You can always correct for it in software. ;) On Tue, Mar 14, 2017 at 8:49 AM, jimlux wrote: > On 3/14/17 5:04 AM, Bob Camp wrote: > >> Hi >> >> The cost difference between a complete oscillator package and a simple

Re: [time-nuts] TTimelab question

We have a local metalworking place that will laser cut steel and Al to 3/8". For small runs (like 1), they are very competitive to simply buying the materials alone. I had them make me 3 1U panels from 3/16" steel with 12 D holes to build N patch panels. $15 ea. Powder coated in my color of

Re: [time-nuts] purpose of time of day display units

#5) Everyone likes blinkenlights. > On Jan 22, 2017, at 08:55, jimlux wrote: > >> On 1/21/17 10:31 PM, Ruslan Nabioullin wrote: >> Hi, looking at pictures of various time metrology equipment setups for >> best practices and inspiration, I have commonly seen time of day

[time-nuts] HP 5372A channel c option 030

While I had the 5372a apart today to replace the battery, I noticed that there is an SMA for channel C on the events board and diagram showing a cable from there to the front panel. This suggests to me that the upgrade is a cable and a key, jumper, or memory setting. Anyone ever done the

Re: [time-nuts] Line Voltage - USA

> How much trouble do hams have with their insurance companies? Typically very little if you have a rider to cover it. Costs a few $ a year Had my basement flood a number of years back and take out a few k worth of vintage computer gear. Not a problem. Covered to replacement cost. I have a

Re: [time-nuts] 5372A A7 CPU board

gt; the KO4BB site > http://www.ko4bb.com/getsimple/index.php?id=manuals > > I can post mine if that one isn't sufficient. > > Regards, John K1AE, Bolton, MA > > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Bowne

[time-nuts] 5372A A7 CPU board

I have the CPU board 05372-6007 out of my 5372A this evening to replace the battery. While looking at it, I see jumpers for 64/256K and 512k/2M. I suspect the 64/256 is for the RAM as it is located next to the (non socketed) RAM. Does anyone have a schematic or listing of what all the

[time-nuts] HP 4352A/B with different signal generator

There was a thread about using a different SG with the 4352A/B about seven years ago. I happened upon the answer today. Set the SG type from the LO menu. Type 1: 8664A/B Type 2: 8657B Type 3: 8648B/C, E8241A, E8244A, E8251A, E8255A Type 4: User defined. To define your own, use the GPIB

Re: [time-nuts] Is there any Ubuntu/Linux Software for the Z3801A?

Walter, You can always download VirtualBox and run a Windows system in there under Linux, OS X, Solaris, or whatever you like. It's free, and it works well. Oracle VM works too, but is probably overkill. Bob > On Dec 1, 2016, at 13:07, walter shawlee 2 wrote: > >

Re: [time-nuts] RPi/ beagle bone-like computer without video

Fits very nicely into a 5370 in fact. :) > On Nov 30, 2016, at 17:12, Graham / KE9H wrote: > > The BeagleBone Green is a BeagleBone Black with the HDMI and video chip > removed. > > Mouser Part number *Mouser Part #: *713-102010027, $39, In stock. > > > Makes a great

Re: [time-nuts] Linux PPS clues?

I suspect the multitasking aspect of the OS will give you far more jitter than one could cope with. > On Nov 4, 2016, at 22:46, Casey L. Jones wrote: > > Maybe you could use something like a serial to parallel converter chip or the > serial port input of a

Re: [time-nuts] Thinking outside the box a super reference

Not to mention there is not so sensitive film, sensitive film and really sensitive film. Good old orthographic film took minutes in bright light. > On Nov 4, 2016, at 20:24, Poul-Henning Kamp wrote: > > > In message

[time-nuts] IRIG-B for OS X

Has anyone seen an IRIG-B generator for OS X sound port? I know there is one for the PC in NTP, but thought I would ask before diving in to that asp pit. Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Need 10 MHz for DSN space-probe hunting

Just shipped out three new systems for $DAY_JOB to Goldstone, Madrid and Canberra. Love it when work and time nuts intersect. > On Sep 13, 2016, at 17:35, Andy ZL3AG wrote: > > > That sounds like fun! > > Do they have a mailing list they hang out on? > >

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

Just finished creating it at groups.io *https://groups.io/g/svna * and sign up. :) On Mon, Aug 22, 2016 at 12:38 PM, Tom Miller wrote: > Maybe do it on Mewe.com? > > - Original Message - From: "Oz-in-DFW" > To:

Re: [time-nuts] DIY VNA design

Comment inline > On Aug 21, 2016, at 18:59, Dr. David Kirkby (Kirkby Microwave Ltd) > wrote: > > I am not convinced that this is time-nuts related, although I am sure many > time-nuts either have a VNA or would like one. Such a project needs its own > forum.

Re: [time-nuts] Working with SMT parts.

I've got a great boom Zeiss microscope bought at an estate sale. Right Place, Right Time. Before that, I generally used a video camera with some extension tubes, a USB video capture dongle, and a spare monitor I keep on the workbench. The monitor and camera are connected with extension cables to

Re: [time-nuts] Shera revisted

There are also some nice cypresses semiconductor parts that are similar and have a really nice dev environment. Basically a core surrounded by programmable logic. Code in C ore close to it. > On Aug 11, 2016, at 07:06, Bob Camp wrote: > > Hi > > To your earlier point,

Re: [time-nuts] [LEAPSECS] Leap second to be introduced at midnight UTC December 31 this year

We've been dealing with speed of light issues for over 20 years in the financial world. And telecom. Someone recently built a new fiber route from Chicago to NY because it was just a touch shorter. The distances are down to hundredths of a ms. > On Jul 25, 2016, at 17:41, Bob Camp

Re: [time-nuts] [LEAPSECS] Leap second to be introduced at midnight UTC December 31 this year

A second here or there is a very big deal to those of us in the financial and database worlds. Aside from the well known instances involving electronic trading I have customers fighting over cabinet positions and cable lengths to place processors closer to disk drives and on switch paths

Re: [time-nuts] The home time-lab

Or the current version: Large AC motor driving a LARGE flywheel with an AC (and/or -48VDC) generator on the other side feeding a very large battery plant. If mains drops more than 1/2 cycle it connects the turbine and starts it up. We had a 5MW one at $OLD_GIG for feeding our supercomputer

[time-nuts] HP 4352A

If anyone has an interest, there is at least one HP 4352A VCO/PLL analyzer left on ebay. $200 OBO. http://www.ebay.com/itm/HP-Agilent-4352A-VCO-PPL-Signal-Analyzer-Generator-Module-10MHz-3GHz-RF-4352S-/131847308679?hash=item1eb2b64587:g:95cAAOSwZJlXMrpQ The one I bought for $130 was missing the

Re: [time-nuts] Good GPSDO on eBay?

To paraphrase a few other folks, taking on the task of building your own, even using the VE2ZAZ board as a basis is a very educational experience. It will teach you an enormous amount. There are lessons in control systems, phase and frequency locked loops, oven controllers, phase and frequency

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

And try to tell transistor A from transistor B from diode C when they are all upside down. A moving head design can be made to pick up parts off of reels on all four sides. But it takes more table space. Which is money. As someone else said, you need Z rotation, which isn't as easy as it

Re: [time-nuts] OT stuffing boards: was GPS interface/prototyping

Aside from using the toaster oven reflow controller from SparkFun? > On Jun 23, 2016, at 21:28, Jay Grizzard wrote: > >> On Thu, Jun 23, 2016 at 11:28:00PM +, Mark Sims wrote: >> A usable re-flow oven can be had for $300. > > Do you (or anyone) have

[time-nuts] HP 4352A

I just asked over on the HP equipment list, but time nuts had a thread on the 4352 a while back... Has anyone got a service manual for the 4352A? The B version is out there in the wild, but the A version seems to have gone MIA. Additionally, should anyone have either a 11636B power divider

[time-nuts] Datum 105242-001 pinout

My Google fu is weak tonight. I'm out in the field getting ready for the ARRL VHF/UHF contest. Thought I'd bring along the bits for my 10GHz transverter and assemble it during the downtime. But I'm being thwarted. Does anyone have the pinout for the six pin Datum 10Mhz oscillators?

[time-nuts] MIT Flea & HP 5328

Apologies to those not in or around Boston tomorrow. You can ignore this msg. I'll be at the flea tomorrow selling off a 5328 with 10811 OXCO & 15GHz prescaler and a few other goodies. I seem to recall that there are generally a few of us in attendance. Perhaps we could have an impromptu

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

N connectors should never need to 'lubed'. Properly assembled they are waterproof. Same goes for BNC. That's what the rubber gasket on the mating surface is for. Metrology grade Ns don't have the gasket but you shouldn't need it on your metrology bench. :) That being said, it never hurts to

Re: [time-nuts] Fast risetime pulse generator

Maybe a krytron? If you are able to get one anyway. ;) > On Apr 13, 2016, at 18:32, David wrote: > >> On Wed, 13 Apr 2016 00:03:03 -0500, you wrote: >> >> ... >> >> If you are building up something, you probably want a SRD (step >> recovery diode) or tunnel diode. But

Re: [time-nuts] Spectrum Analyzer Specifications

> Yes, good spec > ​t​ > rum analyzers usually costs more than 2000 USD even as used. Also, a "high > end" used 2000 USD spec > ​t​ > rum analyzer can be much better than brand new "entry level" 1 USD spec > ​t​ > rum > ​analyzer. And if you need any kind of vectored signal analysis, >

Re: [time-nuts] Spectrum Analyzer Specifications

Don't really need anyone who can order up bare boards in bulk anymore. Many of the board houses will make them on demand for single customers. They fit them into empty spaces in larger board orders. I'd love one if someone is willing to draw it up. I'll even put together a Mouser BOM that can be

Re: [time-nuts] HP 5372A advice

Has anyone published a summary of the differences between the '71 & '72? > On Jan 20, 2016, at 15:11, Poul-Henning Kamp wrote: > > > In message <569fde69.2020...@rubidium.dyndns.org>, Magnus Danielson writes: > >> Good, then I have not remembered completely

Re: [time-nuts] New Member + Basic Questions

The 8640 will lock to an external 5Mhz reference. That's what the BNC in the heatsink is for. At least that is where it is on mine. The trick is doing a good divide by two. However, that said, the 8640 tops out at ~1024MHz, which if you get interested in even the lower microwaves, is not

[time-nuts] The importance of getting time right

Interesting article over on Hackaday this morning mentioning a missile defence system with time drift and the rather tragic consequences. http://hackaday.com/2015/10/22/an-improvement-to-floating-point-numbers/#more-174711 ___ time-nuts mailing list --

Re: [time-nuts] How did they distribute time in the old days?

And to tie this back to the UPS thread, at university, the Simplex clock sync signal made our Vax 11/730 TOD clock run wy fast. I never figured out if it was using line frequency zero crossings for seconds or if it was leaking as DEC fixed it not long after it was installed. (And it was

Re: [time-nuts] How did they distribute time in the old days?

Precise time (and time zones) and the relationship with the telegraph were a side effect of the railroads. You need to keep time (and keep on time) in order to avoid collisions on single tracked main lines. On Wed, Oct 14, 2015 at 12:42 PM, Nick Sayer via time-nuts < time-nuts@febo.com> wrote: >

Re: [time-nuts] Iridium source?

JT, You say GPS isn't available 'often'. Can you define 'often'? As in not at some locations, or as in GPS signal is only available now and then temporally? If the latter, any GPS timing unit with decent holdover should solve the issue. If the former, well, you've gotten some replies on that.

Re: [time-nuts] Thunderbolt/Arduino RS232 Interface Issue

Swap the tx and rx lines on the Arduino. Swap back to reconnect to PC. On Jun 3, 2015, at 10:51, Chris Albertson albertson.ch...@gmail.com wrote: In the RS-232 world devices are either DTE or DCE. You need one of each on each end of the line if using a normal straight cable.To

Re: [time-nuts] KS-24361 NO GPS - again

Typically the pins are two or three lengths. The longest pins are ground, the next are power, then signal pins. Quite often used for things that are hot swapped. Take a look at a USB cable for example. On May 29, 2015, at 19:01, Chuck Harris cfhar...@erols.com wrote: Thees units were

Re: [time-nuts] The low budget UT+ newbie time-nut project: FrequencyReference

Bob, I'm sure much more qualified nuts will chime in, but a few thoughts of mine. Over the years, I've collected enough GPS antennas from hamfests, online vendors and who-knows-where, all for prices from free to tens of dollars. Most of them came with anywhere from 3' to 10+meters of cable. Most

[time-nuts] HP Agilent 5061A Cesium Beam Frequency Standard

If anyone happens to be looking for a 5061A in the Bay Area this might be a good deal. Bob View item: HP Agilent 5061A Cesium Beam Frequency Standard End Time: Feb 20, 2015, 18:32:56 EST ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] Set time on Solaris computer from HP 58503A

On Dec 14, 2014, at 07:42, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 14 December 2014 at 11:57, Hal Murray hmur...@megapathdsl.net redacted That command works. How do you reboot - apart from of course powering the thing off? # shutdown -y

Re: [time-nuts] Beaglebone NTP server

If there is always a system running, why go with the bbb? I use the file server in the basement fed with 1pps to the non USB serial port from a TBolt in my office. You do have a file server in the basement don't you? :) I suppose it would be an interesting experiment to feed an NTP server

Re: [time-nuts] GPS in the news

I read the article and thought it would make for an interesting crowd sourced project if the sensitivity is large enough to build a distributed sensor network with GPSDOs. On Nov 18, 2014, at 17:15, Magnus Danielson mag...@rubidium.dyndns.org wrote: Hi Charles and Joe, Read this,

Re: [time-nuts] 10811's

Is there a quick and dirty summary of which are the good 10811's? Otherwise, I clearly need to go through my collection and characterize them! :) I should probably do that anyway... On Nov 17, 2014, at 21:50, Bob Camp kb...@n1k.org wrote: Hi As best anybody can tell, the improved phase

Re: [time-nuts] Divide by five

I'm surprised no one has suggested 74F161 or other F series. Power hungry, but rated to in excess of 100mhz, some vendors as high as 120mhz, at ordinary temps. I will have to look, but I might have a tube or two of them in the basement. I know I have most of the other 74F. On Nov 7, 2014, at

Re: [time-nuts] NPR Story I heard this morning

You people are evil. Now you have me wondering where I can get a microgram level accurate scale. Simply tracking the weight of a 'constant' (anyone got a silicon sphere with exactly 1 mole of Si atoms in it? :)) over time would be an interesting experiment. As a geologist, I also have to say,

Re: [time-nuts] NPR Story I heard this morning

But won't the doppler effect change as the Cs atoms fall down the gravity well? :) On Tue, Nov 4, 2014 at 3:14 PM, Attila Kinali att...@kinali.ch wrote: On Mon, 3 Nov 2014 11:54:41 -0800 Peter Monta pmo...@gmail.com wrote: Sorry if this is a bit off-topic. I'd like a simple, clear

Re: [time-nuts] NPR Story I heard this morning

I'd be happy to volunteer my 5061 for such an experiment! Located in Troy, N.Y., I can get it down to about 15' ASL, possibly as low as 12' if I go to the basement in a downtown building. The river is at 13' ASL iirc. Bob On Mon, Nov 3, 2014 at 4:53 PM, Tom Van Baak t...@leapsecond.com wrote:

Re: [time-nuts] 5370 processor boards available

At that point, why not just remove the few remaining HP parts and put them in a new enclosure? :) On Oct 8, 2014, at 10:29, Pete Lancashire p...@petelancashire.com wrote: One future project would be to replace the front panel with a LCD/Touch Panel On Wed, Oct 8, 2014 at 6:56 AM,

[time-nuts] Datachron 3070

Has anyone got a manual for one of these by chance? I'd like to feed in an external oscillator but I'd like to know the frequency and amplitude before I go plugging it in at random. Thanks! Bob ___ time-nuts mailing list -- time-nuts@febo.com To

[time-nuts] 5061A SN1816A01444 lives again

Yes, Virginia, there are still a few bargains to be had in the world. After hacking together a power cord, letting it warm up for an hour or so, and going through the long power off procedure from the manual, the latest addition to my test equipment collection came to life. It arrived the other

[time-nuts] Hp 5061a power cord

Anyone know where I might find a power cord for a 5061a? Failing that, the pi out of the connector? Thanks! Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Oscilloquartz 3210 Cesium Standard

Careful Chris, it sounds like you are developing the symptoms of the Vintage strain of the time nuts infection. Next thing you know, you will be looking at tall clocks. Bob, who is debating the wisdom of non invasively synchronizing the family heirloom tall clock to the new cesium clock...

Re: [time-nuts] Oscilloquartz 3210 Cesium Standard

Is there a similar 'bring it back to life' procedure for the 5061A? On Thu, Aug 28, 2014 at 12:32 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote: Chris, Do you have a GPS clock? First turn the operational mode setting from off to second step (ocxo + ion pump) and let it stay there

[time-nuts] MIT Flea

Apologies for to those not in New England or not going to the Flea. I'm heading out to the MIT Flea at oh-freaking-dark in the morning and I know there are often several time nuts who go. If you happen to see a guy wander by in a Horton Emergency Vehicles hat looking very tired, say Hi!

Re: [time-nuts] Tektronix TM500 extender cable kit

I might be interested. Have you thought about making extensions for the smaller connector used to distribute GPIB in the 5000 series? On Aug 4, 2014, at 0:26, Mark Sims hol...@hotmail.com wrote: I just finished laying out a small circuit board for building an extender cable for the Tek

Re: [time-nuts] How are iPhones' clocks set under LTE?

Well, I seem to remember finding NTP running on my jail broken iPhone. But that was a few years ago. On Aug 3, 2014, at 17:41, Tim Shoppa tsho...@gmail.com wrote: Unlike CDMA (where time distribution was an automatic part of the low-level protocol) I suspect the time displayed on many

[time-nuts] Data-chron 3070 manual

Anyone have a copy of the manual for a Data-Chron 3070? It's mostly pretty obvious, bit there is a big I/O connector on the back it would be nice to know the pinout of. Thanks! Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Time Code Units Available

Walter, If the two datachron units and the datum 9300 are still available, I would be most interested. Thanks! Bob On Jul 8, 2014, at 17:08, walter shawlee 2 walt...@sphere.bc.ca wrote: (very sorry for the first file size! Here's a smaller one) Since there were several requests for

Re: [time-nuts] GPSDO standard interface?

Well, I built one of the ve2zaz units, and it has a. Pretty well defined serial interface. On the other hand, the one I use most has a PIC and an LCD, no serial interface. On Jun 25, 2014, at 20:10, Bob Stewart b...@evoria.net wrote: In an offline communication, I suddenly realized that I

[time-nuts] microcontroller based IRIG generator

I remember a few discussions over the last few years about building a microcontroller (PIC, Arduino, MPS430, whatever floats your boat) based IRIG generator. Did anyone ever get one working? Thanks! Bob ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] hp 54600a and rs-232

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 coll...@navcanada.ca wrote: Thank you Thomas, I have that document but it wasn't of much help. I spent much

Re: [time-nuts] hp 54600a and rs-232

...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of bownes Sent: April-22-14 10:48 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] hp 54600a and rs-232 Framing error or override sounds like a parity or stop bit issues. Have you changed those

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