Re: [time-nuts] Am I the only Time Nut who doesn't wear a watch?

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

Re: [time-nuts] Measuring short term stability minus linear drift

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

[time-nuts] pingout for tu00-d200 module

I've seen a number of references to documents claiming to hold the pinout for the TU00=200 module but have not been able to make one work yet. This is the module commonly being sold from Weirdstuff and China, but it does not match the Jupiter pinout. Any help you could render would be appreciated

Re: [time-nuts] wanted: hp plugins

On a similar note, should anyone have a working 853a display they are willing to part with, please contact me. Thanks, Bob On Mon, May 17, 2010 at 10:50 AM, K. Szeker wrote: > PS: > I know Mr. Lüders as a very serious seller, really 100% OK! > K. > > 2010/5/17 K. Szeker > >> Hi Norm! >> On the

[time-nuts] preferred GPS

So, do folks have a preferred GPS module to discipline clocks? Clearly some are better than others. I'd like one that will output in NMEA so I can use it to drive some other things as well, but other than that, it has become clear that the Rockwell MicroTrack TU00 just isn't going to cut it as it o

Re: [time-nuts] Flood of low end priced VNAs on FleeBay

There are a couple of very nice VNA's that can be picked up in assembled or kit form for < $500. The DG8SAQ and N2PK units both come to mind. On Thu, Jun 3, 2010 at 12:58 AM, jimlux wrote: > J. Forster wrote: >> >> VNAs are very expensive toys. I have an HP 8753 and was just outbid on a 6 >> GHz

Re: [time-nuts] PICTIC II

I'd like one. On Thu, Jul 1, 2010 at 11:41 AM, Stanley Reynolds wrote: > The price would be at my cost and actual shipping, no packaging or processing > charges added by me. Not sure of price till I have the number of boards but > hope > as a group we will get a better price. This would also all

Re: [time-nuts] Pic programing for the PICTIC II

Ok. I think there are a few of us who can/would program these up for folks who need one. On Fri, Jul 2, 2010 at 11:43 AM, Stanley Reynolds wrote: > Thank you but I have all I want to do with the boards later I may change my > mind. > > Stanley > > > > - Original Message > From: Chuck Ha

Re: [time-nuts] Pic programing for the PICTIC II

Folks, I put together a mouser 'project' with all of the parts. This means you can just go to the mouser site and order all the parts for the project. No need for anyone to do a group buy of parts, re-pack and re-distribute them. Here's how to get to it: To access the project, click on the url li

Re: [time-nuts] Pic programing for the PICTIC II

(12 weeks...). > The 3266X (side adjust rather than top adjust) is in stock. I'm not sure if > the layout is "side adjust" friendly or not. > > Bob > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf

Re: [time-nuts] PICTIC II PCB order placed

Ill take two boards by the way. Thanks! On 7/3/10, Stanley Reynolds wrote: > > > No problem, I expect to have the boards 7/21, I will have plenty. > > Stanley > > > > > - Original Message > From: Robert Berg > To: Discussion of precise time and frequency measurement > > Sent: Sat, Jul

Re: [time-nuts] Parts (Mouser) for the PICTIC II

It has not been updated yet. We're still looking for a good replacement. On Wed, Jul 7, 2010 at 10:57 AM, Lester Veenstra wrote: > Has the Mouser list: > https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=c7ada9ced0 > Been updated with the right trimmers, or is "right" still up in

Re: [time-nuts] Parts (Mouser) for the PICTIC II

you are not the > intended recipient or the person responsible for delivering the e-mail to > the intended recipient, be aware that any disclosure, copying, distribution > or use of the contents of this e-mail or any documents attached hereto is > prohibited. > > > -Origina

Re: [time-nuts] Parts (Mouser) for the PICTIC II

I'll get these 2 corrections in tonight. I was wondering if the 3/8" parts would fit. On Thu, Jul 8, 2010 at 8:07 PM, Bob Camp wrote: > Hi > > Another thing I think we need to get on the project is Q4: > > 512-2N7000TA    Farichild's version at 0.13 each. > > Since I didn't create the project I

Re: [time-nuts] Parts (Mouser) for the PICTIC II

q4 and the 3/8 trimmers are in my list. On Thu, Jul 8, 2010 at 8:34 PM, Bob Bownes wrote: >  I'll get these 2 corrections in tonight. I was wondering if the 3/8" > parts would fit. > > On Thu, Jul 8, 2010 at 8:07 PM, Bob Camp wrote: >> Hi >> >> Ano

Re: [time-nuts] Handy iPhone app

I put ntp on mine. :) On Thu, Jul 15, 2010 at 10:40 AM, Mark Gulbrandsen wrote: >  Now if only Apple would allow Emerald Time to correct the i-phone's internal > clock we'd actually have something. By using Emerald Time my i-phone's > internal clock has shown itself to be off by as much as 12.

Re: [time-nuts] surface mount (was PICTIC II Parts from Mouser)

Not to mention not having to drill holes anymore. I built a 15Ghz prescaler over the weekend. Total time from concept to completed (and operational!) prototype was < 2 hours. No muss, no fuss, just design the circuit, print out the toner transfer, paste it onto the board, etch, apply paste & parts,

Re: [time-nuts] surface mount (was PICTIC II Parts from Mouser)

A few short videos shot with the camera/usb video capture setup I mentioned earlier: http://www.fastbobs.com/bob/radio/video1.mpg Video 1 - Black & White inspection of a prototype power sensor. Low magnification http://www.fastbobs.com/bob/radio/video2.mpg Video 2 - Colour inspection of same senso

Re: [time-nuts] A different timenuts interest

There is at least one in DC, at the Smithsonian iirc. RPI, where I went to college, had one in the 3 story stairwell in the library. Don't know if it is still there. I remember one someplace in London too. Someone mentioned temperature compensation. What would you need to compensate for? Temp ch

Re: [time-nuts] A different timenuts interest

Silly me, I just realized you need to compensate for the change in length with temperature. This sounds like a great project! On Wed, Jul 21, 2010 at 10:26 PM, Bob Bownes wrote: > There is at least one in DC, at the Smithsonian iirc. > > RPI, where I went to college, had one in th

[time-nuts] Magnavox GPS engine

Does anyone have any documentation on these GPS modules? I've been unable to determine anything other than Magnavox sold the line to Leica. They have a 20 pin header much like a Jupiter, but don't appear to be pin compatible. Thanks, Bob ___ time-nuts

Re: [time-nuts] Magnavox GPS engine

e > http://www.PRC68.com > > > Bob Bownes wrote: >> >> Does anyone have any documentation on these GPS modules? I've been >> unable to determine anything other than Magnavox sold the line to >> Leica. >> >> They have a 20 pin header much l

Re: [time-nuts] Magnavox GPS engine

ooke Clarke wrote: >>> Hi Bob: >>> >>> Like this: >>> http://www.prc68.com/I/MX4102.shtml#4200 >>> >>> Have Fun, >>> >>> Brooke Clarke >>> http://www.PRC68.com >>> >>> >>> Bob Bownes wrote: >

Re: [time-nuts] A different timenuts interest

>  Unfortunately the cable reached its sell by date on the 18th May this year > when it broke, dropping the ball on the marble floor , denting it. Most > unfortunate. Denting the bob or the marble floor? :) ___ time-nuts mailing list -- time-nuts@febo.c

Re: [time-nuts] Basic question regarding comparing two frequencies

Speaking of which, should have or stumble a gpib for said 5328a, I'm looking for one to go in my counter. Thanks, Bob On 7/24/10, Mark Spencer wrote: > Thanks, I'm glad to hear I am on the right track.   At some point it would > be > nice to obtain a counter that can measure the drift of the t

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 wrote: > David, > > Let's

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, tha

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 wrote: > On Mon, 3 Nov 2014 11:54:41 -0800 > Peter Monta wrote: > > > Sorry if this is a bit off-topic. I'd like a simple, clear explanation > for > > the layman th

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] 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 wit

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

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. Fa

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: >

[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 -- t

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 s

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, > demodula

Re: [time-nuts] 10 MHz -> 16 MHz clock multiplier

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

Re: [time-nuts] Needed: The Real Serial USB Fix

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

Re: [time-nuts] Time Nut Pickens at the MIT Flea ?

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

Re: [time-nuts] Good (cheap) PIC chip choice for project?

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,

Re: [time-nuts] A small piece on HP's hydrogen maser in 1968

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? > > > -- >

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

Message- > From: time-nuts-boun...@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 "overrid

[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 T

[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 ht

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 wrote: > > I just finished laying out a small circuit board for building an extender > cable for the Tek TM500 series mainf

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 wrote: > > Unlike CDMA (where time distribution was an automatic part of the low-level > protocol) I suspect the time displayed on many modern phones is n

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 sta

[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 th

[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 d

[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 unsub

Re: [time-nuts] Clocks for Audio gear

> > 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

Re: [time-nuts] Serial port server .. any interest in a write up onusing ?

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

Re: [time-nuts] Serial port server .. any interest in a write up on using ?

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

Re: [time-nuts] [OT] Paywall Rant (was Re: Spoofing GPS)

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

Re: [time-nuts] Trimble T Lassen 2 - suitableantenna....advice.....questions

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

Re: [time-nuts] Cables dor 10 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

Re: [time-nuts] web presentation of data

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

Re: [time-nuts] Reducing lab noise with LED lighting.

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

Re: [time-nuts] Javad's J-Shield

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

Re: [time-nuts] Lady Heather on a Laptop

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

Re: [time-nuts] Tracking NTP displacement and correlation between two clients.

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

Re: [time-nuts] Tracking NTP displacement and correlation between two clients.

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

Re: [time-nuts] Tracking NTP displacement and correlation betweentwo clients.

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

[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 d

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 t

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: > Sent: Monday, August 22, 2016 11:53 AM > Su

Re: [time-nuts] SDR Radio Opinion ?

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

Re: [time-nuts] NTP/1-PPS/RS232 question

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. > >

Re: [time-nuts] NTP/1-PPS/RS232 question

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

Re: [time-nuts] Clock Driver Design

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

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 real question is “

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] 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: > >> Well, if you haven’t

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 RasPi 3B clock with

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,

[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 "

[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 jumpe

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

//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 Bownes > Sent: Monday, January

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 s

[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 up

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 display >> unit(s) ins

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 cho

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 >>> crystal is tiny.

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 >> capacitance on a cable thousa

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 there" ;-) And because

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

m: 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 r

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

Which means you have to have it plugged in and enumerated first. > > Bob > > > From: Bob Bownes > To: Discussion of precise time and frequency measurement > Sent: Monday, March 27, 2017 8:03 PM > Subject: Re: [time-nuts] Timelab, GPIB-USB-B in a VM > > John, >

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 wrote: > > Hi > >

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. Th

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 available

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. Check

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 th

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

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" wrote: >> >> Locking barrel connectors... >> >> Aren&

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

. A good choice for that application IMHO. > > Mark Spencer > > m...@alignedsolutions.com > > > > On Jun 22, 2017, at 6:47 AM, Bob Bownes wrote: > > > > Right Tool for the Job. > > > > I use barrel connectors when I _want_ the cord to come out

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 think they call these "16mm avia

[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 -- t

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. :) 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 issue.

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. > > Bill Hawkins > >

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