Re: [time-nuts] Seeking Toyocom or NDK through hole oscillator information

Quoting Wikipedia; 16.368 MHz is 16 times the 1.023 MHz C/A GPS signal chipping rate; multiplied by 96.25 to get the 1575.42 MHz L1 frequency and multiplied by 75 to get the 1227.60 MHz L2 frequency. > On Jun 14, 2018, at 1:53 AM, skipp isaham via time-nuts > wrote: > > Seeking Toyocom or

[time-nuts] I: Re: Raw phase data of super-5065

Da "tim...@timeok.it" tim...@timeok.it A att...@kinali.ch Cc Data Tue, 12 Jun 2018 07:22:26 +0200 Oggetto Re: [time-nuts] Raw phase data of super-5065 Ciao Attila, here the .gif file. Luciano Da "Attila Kinali" att...@kinali.ch A tim...@t

Re: [time-nuts] Raw phase data of super-5065

6 days run of a modified 5065'B' against GPS. Adrian Am 08.06.2018 um 14:05 schrieb tim...@timeok.it: > Here a ten days simultaneously run of the A and B version compared with my HP Z3816A GPSDO. > Luciano > > > Da "time-nuts" time-nuts-boun...@fe

Re: [time-nuts] Raw phase data of super-5065

her people could carry out the same tests in the medium and long term Adev stability. Luciano www.timeok.it Da "Bob kb8tq" kb...@n1k.org A "Luciano Paramithiotti" tim...@timeok.it,"Discussion of precise time and frequency measurement" time-nuts@febo.com C

[time-nuts] EROS-800-MA-90 pinout?

Hi, I have four EROS 5MHz oscillator brand new. The external connections are via an octal connector. On the top there are coarse and fine tuning trim. Does anyone have the pin connection and technical data? Thank you Luciano ___

Re: [time-nuts] Raw phase data of super-5065

stability and not the short term stability of the Super version I agree it is improved.. Luciano Da "Bob kb8tq" kb...@n1k.org A "Luciano Paramithiotti" tim...@timeok.it,"Discussion of precise time and frequency measurement" time-nuts@febo.com Cc Data

Re: [time-nuts] Raw phase data of super-5065

Hi Attila, I am doing the long therm stability test on a couple of HP5065, one original A type, the second B or "super" compared with my best long therm stability, a GPSDO HPz3816A. This test will be 30 days long. It is a second test, with a second couple of HP5065A/B, to verify the

[time-nuts] 5950 Crystal impedance meter manual

Hi all, Thank you all for the precious answers and the links you sent me. I'm studying them very carefully. I still continue to look for the manual of the 5950 because I like to keep the manuals of all the measuring instruments I have in my laboratory. Thanks again Luciano

Re: [time-nuts] 5950 Crystal impedance meter manual

Design shows how to a couple different simple benchtop jigs to measure crystal motional parameters and compute Q. Tim N3QE On Wed, May 23, 2018 at 4:44 AM, tim...@timeok.it <tim...@timeok.it> wrote: > >Hi all, >I found this Crystal Impedande Meter produced by RFL

Re: [time-nuts] Ublox M8T question

and file for enabling GLONASS so this could give some pointers. (I've not tested this since my LEA-6T only supports GPS+SBAS) Tim ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo

[time-nuts] AnyLocker - Lock your radios and other things to a standard of your choice

section to be able to take orders for the device. regards Tim --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] suggestions on getting 24 Mhz ?

Hi Mark, this is a product of Glen VK1XX. he will have a website with eCommerce up soon and when that happens I will announce it to the list Regards Tim On Wed, 9 May 2018 at 10:43, Mark Spencer <m...@alignedsolutions.com> wrote: > Hi would anyone be able to point me

Re: [time-nuts] suggestions on getting 24 Mhz ?

Hi Pete, You probably want this... https://github.com/glenenglishgithub/anylockerFS Lots of VK's are lining up for the first run of boards to lock their radios. regards Tim On 11/04/2018 8:00 PM, Pete Lancashire wrote: Needed for SDR project as external clock source. -pete

Re: [time-nuts] Fwd: HP 53131A Power Off Mod

Hi Wayne, Congrats on a nice simple mod ! I have both a 53131 and 181 in need of these :) Can you share the gerbers for your PCBs and then I can cut them out on my mill. I could probably make a few for any interested Australians, to save on cross pond postage. thanks Tim On 8/05/2018 9

Re: [time-nuts] nuts about position (cheap receiver)

e .sum file: the 'Satellite orbits/clocks' lines seem to have 'emu', 'emr' or 'igs' for the NRCan hourly/UltraRapid, Rapid and Final solutions respectively). Submittals less than a day after the observations in the RINEX file seem to result in the use of the Hourly/UltraRap

Re: [time-nuts] nuts about position

On Wed, Apr 25, 2018 at 8:38 AM, Tim Lister <lister...@gmail.com> wrote: > On Wed, Apr 25, 2018 at 7:56 AM, Tom Van Baak <t...@leapsecond.com> wrote: >> List -- I had a recent query by a researcher who would like to pinpoint the >> location of his telescope(s) withi

Re: [time-nuts] nuts about position

2 of the satellites currently. There are several articles evaluating in comparison with e.g. a ublox M8T at https://rtklibexplorer.wordpress.com/tag/swift-piksi-multi/ > > RGDS > GARY Cheers, Tim ___ time-nuts mailing list -- time-nuts@fe

Re: [time-nuts] nuts about position

) of 0.105 m, 0.089 m, 0.217 m in latitude, longitude and ellipsoidal height respectively. I was quite impressed with the results without use of the L2 frequency to correct for the ionosphere etc. > > Thanks, > /tvb > Cheers, Tim ___ time-nut

Re: [time-nuts] Introduction & GPSDO Question

t) and it would turn most of the lights on after a while and stop working. These problems went away after I connected on outdoor antenna and powercycled the unit. Cheers, Tim ___ 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.

Re: [time-nuts] 4046 replacement

must be 40+ years old now) I see no reason to rip it out and replace it with the newer variant. You may have trouble finding through-hole (non-surface mount) 74HCT9046A's at this date anyway. Tim N3QE On Wed, Apr 18, 2018 at 5:40 AM, donald collie <donaldbcol...@gmail.com> wrote: > Thanky

Re: [time-nuts] Dual GPSDO - any advantage?

Most of the Chinese cheapo units have been frequency, not phase locked. It would be great if you could put the GPSDO outputs into a 2 Channel scope and eyeball them for a while to see if they appear in phase (say plus-minus 20ns) over a few hours. Tim N3QE > On Apr 10, 2018, at 1:43

Re: [time-nuts] Weird Stuff WareHouse shutting down

C was SUPERB for test equipment in the 1990's when the aviation industry in Southern California was downsizing. IMHO not nearly so interesting today. Unless you're into pneumatics in which case they are a delight. Tim N3QE On Sun, Apr 8, 2018 at 10:36 AM, paul swed <paulsw...@gmail.com>

[time-nuts] Timestamping audio waveforms

the second the recording was begun. There would likely be some delta (maybe half the sample interval?) between the two channels but I'm fine with that as long as it is at the sub-millisecond level. Tim N3QE ___ time-nuts mailing list -- time-nut

Re: [time-nuts] WWV/CHU

. A recent QST or QEX had a nice simple 10MHz WWV receiver in it. I think it was oriented towards extracting 10MHz carrier and not for demodulating the time code, however. Tim N3QE > On Mar 29, 2018, at 6:12 AM, Hal Murray <hmur...@megapathdsl.net> wrote: > > > What do I need

Re: [time-nuts] Need a Watch Recommendation

watches to be way more accurate than a minute a month. In the past I’ve marveled here about my cars clock which drifts less than a minute every 6 months (DST change reset interval) despite being in a very adverse temperature range. Tim N3QE > On Mar 15, 2018, at 11:51 AM, Dana Whit

Re: [time-nuts] Frequency deviations in Europe affect clocks

7 minutes fast after the catch-up? Tim N3QE On Thu, Mar 8, 2018 at 9:50 AM, <d.schuec...@avm.de> wrote: > > Hi, > > from new years eve until today 00:00 the European Electricity Grid entsoe > lost 16891 sinewaves, nearly 338 seconds. Enclosed you find the sketch of >

Re: [time-nuts] HP 107BR FS

Perrier pse can you give your email to have a direct contact? Luciano tim...@timeok.it Da "time-nuts" time-nuts-boun...@febo.com A "time-nuts@febo.com" time-nuts@febo.com Cc Data Wed, 28 Feb 2018 02:51:48 + (UTC) Oggetto [time-nuts] HP 107BR FS

Re: [time-nuts] Beware the Casio WaveCeptor analog watch

are because you were working near large AC or pulsing DC currents? Tim N3QE On Sun, Feb 25, 2018 at 6:52 PM, Skip Withrow <skip.with...@gmail.com> wrote: > Hello Time-Nuts, > > For many years I owned a Casio WaveCeptor digital watch and like it a > lot. The down side was th

Re: [time-nuts] Team of physicists repeats tvb Project GREAT

remedy this inconvenience22 <https://www.nature.com/articles/s41567-017-0042-3#ref-CR22>." Cheers, Tim -- Chris Caudle ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/

Re: [time-nuts] CSAC Project(was CSAC purchase)

oscillators are maybe a factor of three better. Tim N3QE On Thu, Jan 25, 2018 at 12:39 PM, gandalfg8--- via time-nuts < time-nuts@febo.com> wrote: > > > Hi > > The CSAC spec sheet calls out an aging rate of 0.9 ppb per month as > “typical”. There is also a temperature spec of 0.4

Re: [time-nuts] Time interval measurement vs dual mixer method

Corby, thanks for the information. I'm definitely interested in the short therm ADEV but especially for Tau from 1 day and over to test high stability standard over the time. I will have further tests. Cheers, Luciano Da "time-nuts" time-nuts-boun...@febo.com A

Re: [time-nuts] Time interval measurement vs dual mixer method

Hi Corby, I did several tests to verify the system noise floor using the same source for both input channels. I have seen that the result varies a lot as the difference in time between the two channels varies. Moreover, if I do two successive tests without changing the parameters and

Re: [time-nuts] Anyone have a working HP-113AR/BR Clock?

tim...@timeok.it www.timeok.it Da "time-nuts" time-nuts-boun...@febo.com A "Discussion of precise time and frequency measurement" time-nuts@febo.com Cc Data Wed, 3 Jan 2018 22:15:23 -0800 Oggetto [time-nuts] Anyone have a working HP-113AR/BR Clock? I'd

Re: [time-nuts] Stable32 now available

Very interesting news. It would be nice to be able to set the RS232 port to work with the TICC in real time. Luciano www.timeok.it Da "time-nuts" time-nuts-boun...@febo.com A "Discussion of precise time and frequency measurement" time-nuts@febo.com Cc Data Tue, 2 Jan

Re: [time-nuts] Down-conversion to IF and sampling

beating between the ADC and the downconversion oscillator would get washed out. This issue of avoiding simple harmonic relationships between receiver oscillators (and samplers) long predates digital radios, it is a goal in any superhet to avoid "birdies". Tim N3QE On Sat, Dec 23, 2017

Re: [time-nuts] accurate 60 hz reference chips/ckts

That’s not a problem, that means you’re phase locked instead of just frequency locked. This is the phase-nuts mailing list, right? :-) Tim N3QE > On Dec 14, 2017, at 6:19 PM, Alan Melia <alan.me...@btinternet.com> wrote: > > I dont think working that way would give a stable

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

ESP8266 is my favorite as of late. It comes in a "DIP Form Factor" and does SPI and random DIO very nicely. Even better, as to user interface, it has Wi-Fi and instead of physical buttons, the UI can be as simple as buttons on a web page it serves up. Tim N3QE On Wed, Dec 13, 2017

[time-nuts] Thunderbolt command to reset the Date register.

Hi, I have a Trimble Thunderbolt. I'm looking for the command to reset the registry that blocks the update of the Date once full. Can someone help me? thanks, Luciano www.timeok.it ___ time-nuts mailing list -- time-nuts@febo.com

[time-nuts] Thunderbolt Locked/Unlocked pin on PCB?

Hi, I'm looking for a connection on the Thunderbolt board, a logical level, that showme when the GPSDO is locked to the GPS. Can someone help me? Luciano www.timeok.it ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] Trimble Mini-T Timing Glitches

milliseconds) when tracking was borderline. I do not expect anything modern to have problems like this. Tim N3QE On Thu, Nov 30, 2017 at 2:35 PM, Keith Loiselle <keith.loise...@gmail.com> wrote: > Hello everyone, > > I have heard reports of Trimble Mini-T timing glitches with

Re: [time-nuts] Performance verification for time counters

At that low a frequency aren’t you actually testing the temperature and time stability of the gain controlling components? Tim N3QE > On Nov 29, 2017, at 9:04 PM, jimlux <jim...@earthlink.net> wrote: > >> On 11/29/17 5:53 PM, Bob kb8tq wrote: >> HI >>> On Nov

Re: [time-nuts] Allan variance by sine-wave fitting

. Tim N3QE On Wed, Nov 22, 2017 at 5:57 PM, Ralph Devoe <rgde...@gmail.com> wrote: > Hi, >The fitting routine only takes up 40 uS of the 1 sec interval > between measurements, as shown in Fig. 1 of the paper. This is less than > 10(-4) of the measurement interval.

Re: [time-nuts] HP5065A C-field mods and optical unit mods

Charles, Imagine having a source and fixed resistors with TC equal to zero. The current variation of the coil varies between 2.5 and 6 mA. In addition, the relationship between current and frequency variation of the HP5065A is not linear. If the pot is short-circuit, the current

Re: [time-nuts] HP5065A C-field mods and optical unit mods

Hi Charles, what you refer is the resistance relation referred to the LM299 source around 14VDc but you have to consider the tuning range of the pot, in the original HP5065A is 2E10-9. Of course, it depends on the setting value of the variable resistance, but you have to consider a

Re: [time-nuts] HP5065A C-field mods and optical unit mods

Hi Corby, about the C field ten turn pot you write is a low TC pot. Normally a good Vishay pot is 20 PPM/C, This is in conflict with the 1PPM resistors ad voltage reference. What kind of pot do you have used? http://www.mouser.com/ds/2/427/533534-768216.pdf Luciano timeok

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

ith weird drivers on Linux (Windows doesn't matter at all). I do not mind writing my own read-out software (that's quickly and easily done). What would people here recommend? As mentioned by others the Prologix works fine in e.g. Timelab but is not supported by NI VISA code or things like

Re: [time-nuts] Time and frequency practical exercise 2018 late quarter; precision measure of 432mhz band Sat in Lunar Orbit

ticipating in these determinations for decades too. A very nice review of the work done 25 years ago by students, was published in QST by N6XT: http://www.setileague.org/articles/ham/kepler.pdf Tim N3QE ___ time-nuts mailing list -- time-nuts@febo.com To u

Re: [time-nuts] HP5065A C-field mods and optical unit mods

Hi Corby, I would first like to thank you for sharing your precious studies with us. I love the HP5065A because it's an extremely interesting project and I'm convinced like you we have a lot of room for improving its performance. * In addition

Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

Isn’t info about what satellites are where, just eye candy and irrelevant to a real GPSDO? Tweaks to the elevation mask ought to be measurable in the PPS quality (if they aren’t then they’re irrelevant). Tim > On Nov 14, 2017, at 10:39 PM, Mark Sims <hol...@hotmail.com> wrote: >

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

pse replace: 1k sec 6.64 E-15 with: 1k sec 6.64 E-14 Luciano Da "time-nuts" time-nuts-boun...@febo.com A t...@leapsecond.com, time-nuts@febo.com Cc Data Sat, 11 Nov 2017 14:38:29 +0100 Oggetto Re: [time-nuts] Favorite counters (current production)? Hi

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

Hi all, just for info the ADEV noise floor of my TICC is: 1 sec 6.35 E-11 10 sec 6.33 E-12 100 sec 6.30 E-13 1k sec 6.64 E-15 best regards , Luciano Da "time-nuts" time-nuts-boun...@febo.com A "Discussion of precise time and frequency measurement"

Re: [time-nuts] ublox NEO-M8T improved by insulated chamber?

the early days. It's page 9 (attached) of: > > I agree, GPS accuracy is great, but I am NOT talking about GPS timing, > I am talking about UTC timing accuracy. > > I thought the problem was that the UTC time from the GPS was wandering > on a diurnal time frame. The GP

Re: [time-nuts] Designing an embedded precision GPS time

I don't know of any "non-historic" NTP implementation that even attempts to drift correct the RTC clock. Now, the RTC clock is useful to set the time at boot before ntpd gets started. Tim N3QE On Tue, Oct 31, 2017 at 8:19 PM, MLewis <mlewis...@rogers.com> wrote: > If on

Re: [time-nuts] vectron to be acquired by MicroSemi

Hi, It has become a colossus. And market competition? Luciano. www.timeok.it Da "time-nuts" time-nuts-boun...@febo.com A "Discussion of precise time and frequency measurement" time-nuts@febo.com Cc Data Fri, 27 Oct 2017 20:14:01 -0400 Oggetto Re: [time-nuts]

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

picPET -- Precision Event Timer http://www.leapsecond.com/pic/picpet.htm 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/ > mailman/listinfo/time-nuts>> wrote: > > > > >

Re: [time-nuts] Weird GPSDO behavior - update

Is there a way you can force your currently disciplined oscillator to free-run, and log the phase difference between oscillator and GPS over a couple of days? Tim N3QE On Tue, Oct 3, 2017 at 2:15 PM, Skip Withrow <skip.with...@gmail.com> wrote: > Hello Time-Nuts, > > Well,

Re: [time-nuts] HP 5065 Meter readings after restoration and adjustments: 2nd Harmonic Problems ?

Hi , these jumps when tapping is normal when the HP5065A is restored to the life ater a long storage time, they disappears after a long warmup (weeks). Luciano Da "time-nuts" time-nuts-boun...@febo.com A "Ulf Kylenfall" ulf_...@yahoo.com,"Discussion of precise time and

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

Civilian receivers generally do not measure absolute strength but instead report S/N. The spoofer could fake up a reasonable amount of noise to get a wimpy S/N with a much stronger signal. Tim. On Mon, Aug 14, 2017 at 1:40 PM, ken Schwieker <ksw...@mindspring.com> wrote: > Wouldn't m

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

y location. Us time-nuts don't mind surveying for days. Real GPS positioining users want the answer much more quickly! Tim N3QE On Mon, Aug 14, 2017 at 12:51 PM, Attila Kinali <att...@kinali.ch> wrote: > On Mon, 14 Aug 2017 12:09:43 -0400 > Tim Shoppa <tsho...@gmail.com>

Re: [time-nuts] Ships fooled in GPS spoofing attack suggest Russian cyberweapon

it would be possible to walk a spoofed time/space code in a way that time moved without so obvious of a discontinuity. I'm sure there would be effects a time-nut could notice still. Tim N3QE On Sat, Aug 12, 2017 at 5:23 PM, John Allen <j...@pcsupportsolutions.com> wrote: > FYI,

Re: [time-nuts] Can Lady Heather set PC time directly from a TrimbleThunderbolt?

. And having real NTPD is so much superior to the many poor quality commercial programs out there that a newbie might otherwise install. Tim N3QE On Fri, Aug 4, 2017 at 2:28 PM, Chris Albertson <albertson.ch...@gmail.com> wrote: > On Fri, Aug 4, 2017 at 7:39 AM, Chris Wilson <ch...@ch

Re: [time-nuts] A look inside the DS3231

it down and reduce power consumption to get down to 1uA. So in the DS12887, Dallas figured out how to go at least a factor of two lower in power. I would imagine there's a series of patents by watch companies on this subject as well probably all back in the 1970's and 1980's. Tim N3QE On Sat, Jul

Re: [time-nuts] unknown GPSDO

what Shera documents. Is there a "Brooks Shera GPS family tree" out there showing recent evolution of the design? Tim N3QE On Tue, Jul 18, 2017 at 11:10 AM, David C. Partridge < david.partri...@perdrix.co.uk> wrote: > ISTR that you started it with a short time constant to get

Re: [time-nuts] Papers on timing for lunar laser ranging

The gizmo with a CRT is a Specific Products WWV receiver. I'm not sure exactly which model, some had the ability to show on the CRT the CRT phase between local clock and WWV via pips, others would show phase via Lissajous figures. Tim N3QE > On Jul 12, 2017, at 4:46 PM, Bob kb8tq

Re: [time-nuts] Papers on timing for lunar laser ranging

hat knob occasionally as the >> crystal >> you are tuning drifted. > > > My mid 2000s 10 MHz OCXOs from Wenzel have both EFC and a manual adjustment > of some sort (I'm not sure what's under the little cap on the side.. a > trimmer cap or something?) > Right. Apparently t

[time-nuts] Papers on timing for lunar laser ranging

anyone know what sort of oscillator these used ? I thought most (good) OCXOs had/have a EFC at the 1e-13 level but maybe "back in the day" the availability of suitable DACs with a large dynamic range was more of an issue ? Cheers, Tim ___

Re: [time-nuts] PI Zero W LED Desktop Clock with 10ths of Seconds / NTP disciplined

frequency discipline on? All that fit on a PDP-11 nicely so I ought to be able to get much of it into an ESP8266. Tim N3QE On Sat, Jul 1, 2017 at 9:45 PM, M. George <m.matthew.geo...@gmail.com> wrote: > I just finished an LED clock kit that can be found on hackaday.io by Nick > Sa

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

of equipment falling off edge of bench by the power pole. Despite the above two caveats I don't have anything better. Molex connectors aren't really locking either and the certainly don't last at their rated current when exposed to an automotive or outdoor environment. Tim N3QE > On Jun 22, 2

Re: [time-nuts] Hints on PPS Buffer design...

even today. Tim N3QE On Sat, Jun 17, 2017 at 4:15 AM, Clay Autery <caut...@montac.com> wrote: > Trying to pin down a reasonably optimal buffer design for bringing PPS > out... I've looked at all the references, like the i3detroit.org site > et al. > > Of the few schematics an

Re: [time-nuts] GPS splitter

double or more the thickness (the connectors are on the ends). > > greg > --- Cheers, Tim ___ 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.

Re: [time-nuts] Poor man's oven

by a large fraction. Tim N3QE Sent from my VAX-11/780 > On Jun 5, 2017, at 5:16 AM, Clint Jay <cjaysh...@gmail.com> wrote: > > There's a few 'OCXO' designs out there, I'm not qualified to comment on the > timenutty quality of them but someone else mentioned Hans Summers offerin

Re: [time-nuts] poor-man's oven

ics of low-end TCXO's. They seem to age even worse than plain old crystal oscillators, My theory, is this is because the temperature compensation components are themselves aging more than an AT cut crystal does by itself, but I've never ripped into one (they're way too tiny to rip into anyway!).

Re: [time-nuts] Next Aug 21 eclipse and time flow --> WWV carrier phase

eek anyway but we are just exchanging serial numbers, not talking about FMT techniques :-). Tim N3QE On Mon, May 29, 2017 at 8:30 AM, Bob kb8tq <kb...@n1k.org> wrote: > Hi > > There are a *lot* of SDR boards out there today. The HackRF One is a pretty > cheap one (you get wha

Re: [time-nuts] Next Aug 21 eclipse and time flow

shift more clearly then I might see an ionospheric effect during the upcoming August 21 eclipse, which nicely traces a path from west to east not too far off the line between Ft Collins and my location. Tim N3QE On Sun, May 28, 2017 at 6:17 PM, iovane--- via time-nuts <time-nuts@febo.com >

Re: [time-nuts] LPFRS phase ripple?

amplitude stability (also a lamp!) Tim N3QE > On May 23, 2017, at 3:40 AM, Matthias Jelen <matthias.je...@gmx.de> wrote: > > Hello Time-Nuts, > > i´ve been playing with some Rbs recently. > > I compared two LPFRS-01 to a PRS-10. One seems to behave quite well (compared

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

Bob, that was 16.368MHz, an extremely common crystal to find in the first couple generations of GPS receivers. 16.368 MHz is 16 times the 1.023 MHz C/A GPS signal chipping rate; multiplied by 96.25 to get the 1575.42 MHz L1 frequency and multiplied by 75 to get the 1227.60 MHz L2 frequency. Tim

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

ly because you want to tap the walls for 4-40. Alternative designs can let you use much thinner material and a very different flange on the ends, but the costs will likely move towards welding/brazing rather than machining. Tim N3QE On Thu, May 18, 2017 at 12:54 PM, <cdel...@juno.com> wro

Re: [time-nuts] GPS seconds conversion on an Arduino

. One author notes that if you want your gear ratio to work well for the next 100 years, you should use the ratio appropriate for 50 years into the future, not today. Now admittedly, microcontrollers generally don't last as long as a set of gears :-) Tim On Sat, May 13, 2017 at 9:58

Re: [time-nuts] time.gov

by the Naval Observatory I try to at least glance at my watch and compare it to the big clock too :-). Occasionally their LED clock on Mass Ave is off. Tim N3QE On Thu, May 11, 2017 at 6:09 PM, Donald E. Pauly <trojancow...@gmail.com> wrote: > https://www.febo.com/pipermail/time-nuts/2017-May/

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

If you're looking for a modern display screen that is easy to interface to and drop-dead beautiful, check out the OLED modules. But on-life is extremely limited, often after one or two years defects become visible - not for an always-on application. Tim N3QE Sent from my VAX-11/780 > On Ma

Re: [time-nuts] TruePosition GPS Receiver

know of a source for cables for the J2/serial output or is it OK to use mini-grabbers/0.1" plugs to a RS232 breakout ? Tim ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Using 5335 frequency counter for timing

tion using these TDR's. Tim N3QE On Sun, May 7, 2017 at 8:52 PM, Jerry Hancock <je...@hanler.com> wrote: > I was showing my son how we could measure the difference in cable lengths > by using the velocity of light and cable velocity factor. I used a scope > to measure the off

Re: [time-nuts] Frequency counter questions

and it *has* to be done by a PIC. Of course there are lots of logic families that don't need a prescaler at 100MHz and could be used to make a frequency counter. Most frequency counter designs out there on the net introduce an extra count or two due to flawed conception of gate. Tim N3QE Sent

Re: [time-nuts] Name of integral of timing residual

to be unconcerned with the integral you speak of. Tim N3QE On Thu, Apr 20, 2017 at 1:17 AM, Jim Palfreyman <jim77...@gmail.com> wrote: > Folks, > > I'm after the formal name of something (if it exists), and this group, if > any, should know. > > Consider a plot of a timing resid

Re: [time-nuts] TAPR TICC boxed (input protection)

I have a really naive question: how can picoamp leakage parts be relevant in low impedance input pulse conditioning to an interval counter? Tim N3QE > On Apr 11, 2017, at 7:46 AM, Bob kb8tq <kb...@n1k.org> wrote: > > Hi > > >> On Apr 11, 2017, at 7:05 AM,

[time-nuts] 32768Hz oscillator using AT-cut crystal

of the MM5369 lives on, almost half a century later! That was a chip that started with a 3.579MHz colorburst crystal and made 60Hz out. MM5369 was discontinued decades ago, NTSC is dead for several years, but 3.579MHz crystals still readily available I see. Tim N3QE

Re: [time-nuts] Car Clock drift - the lowly 32kHz tuning fork crystal specs

running fast. But someone who keeps it in the changing outdoor weather, might find it running on time (on average) in both winter half and summer half of year. Still impressive that it's better than 4ppm on average over summer and winter. Tim N3QE On Sun, Apr 9, 2017 at 7:45 AM, Tim Shoppa

[time-nuts] Car Clock drift - the lowly 32kHz tuning fork crystal specs

to body temperature for the turnover point. Tim N3QE ___ 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.

Re: [time-nuts] The ultraAtomic clock for home

. Tim N3QE ___ 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.

Re: [time-nuts] HP-59309A Clock counts only seconds

or modified to be tied to external minute and/or hour synchronization pulses and these inputs can hold and jam zeroes into the minute and hour counters. Tim N3QE On Mon, Apr 3, 2017 at 7:43 PM, Jeremy Nichols <jn6...@gmail.com> wrote: > I have a new-to-me HP-59309A HP-IB Digital Clock. The cl

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

don't have a stream pointer as to how far in it was but I think it was towards the early-middle > > Data on a bunch of oscillators as soon as I get it to work...:) > > Thanks, > Bob Cheers, Tim ___ time-nuts mailing list -- time-nuts@febo.com To u

Re: [time-nuts] WTB: GPSDO

own UTC(TAL), along with some means of displaying multiple timescales, which may involve another construction project as available ones either seem to have NTP servers built in or want IRIG-B or cost a fortune (unless I'm just googling for the wrong

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

Morris's figure of "taking over a minute to stop oscillating" at 25Hz, implies a Q in the ballpark of 25*60, or Q>1500, which is quite good for a tuning fork in air (usually quoted around 1000). Tim N3QE On Thu, Mar 16, 2017 at 2:04 PM, Bill Hawkins <bill.i...@pobox.com>

Re: [time-nuts] Smart Phone time display accuracy...?

se to the final destination. The last hop that reported was about 175ms. Tim ___ 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.

Re: [time-nuts] WTB: GPSDO

ne. Do 2 GPSDOs tell you much more or just that each is different and you need a third to adjudicate ? (I can see a slippery slope looming from here...) Cheers, Tim ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi

Re: [time-nuts] Bye-Bye Crystals

and cleaning the electrodes and crystal helps a bit - there's some attempt at sealing, like a rubber grommet, in some of the FT-243 holders but mostly there's no attempt at sealing. It's possible the rubber grommets just made things worse through outgassing. Tim N3QE On Mon, Mar 13, 2017 at 11:01 AM

Re: [time-nuts] Coming to a drive-way near you: Optical Lattice clocks

Well, I learned a new phrase. I can't wail until the chronometric-leveling-nuts list gets started! Tim N3QE On Thu, Feb 23, 2017 at 3:23 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > Have we talked about this yet ? > > https://arxiv.org/abs/1609.06183 > > https://arx

Re: [time-nuts] advice

So this is the Pound-Rebka experiment with lasers instead of the original Fe57 gamma rays and Mossbauer effect? Tim N3QE Sent from my VAX-11/780 > On Feb 21, 2017, at 9:33 PM, Bill Byrom <t...@radio.sent.com> wrote: > > Review the theory and results in this p

Re: [time-nuts] Vintage Frequency Measurement

For those of us who have to translate between the old "cps" and the modern "Hz", I found this handy conversion table on the web: http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second Tim N3QE [image: Inline image 1] On Tue, Feb 14, 2017 at 5:29 AM, Pete

Re: [time-nuts] Thermal effects on cables

/GMCA-0224-DAT-US-MAY16_e.pdf Funny how people always want to put the words "dielectric" and "constant" right next to each other but we know it isn't constant :-) Tim N3QE On Mon, Jan 23, 2017 at 8:26 AM, Dr. David Kirkby (Kirkby Microwave Ltd) < drkir...@kirkbymicrowave.co

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