Re: [time-nuts] [volt-nuts] febo.com Mailing List Changes

John, thanks for all you’ve done in the past. Regards, Jerry NK6P > On Jun 6, 2018, at 11:17 AM, John Ackermann N8UR wrote: > > Some of you may know that febo.com lives on leased hardware at a data center. > That hardware is now at its end of service life, which means it won't be >

Re: [time-nuts] Traveling to the US west coast

Are you going to be in San Francisco area? Maybe we could get a time-nuts breakfast together with a couple of us. Regards, Jerry > On May 17, 2018, at 11:25 PM, Attila Kinali wrote: > > Hi, > > Some of you might already know, I will fly to the US west coast > to attend

Re: [time-nuts] HP 5372A

By the way, if you would like some data captured during the last run, let me know. I have an excel sheet of the peak data from spectrum lab centered on 1850hz as I use the 3586B receiver. Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On May 11, 2018, at 10:52 AM, Je

Re: [time-nuts] HP 5372A

If you were in Connie’s back yard or had a very stable ground wave, then yes, you could automate the testing. There are a number of challenges with this method as looking at the data with a simple graph will tell. You might have large fluctuations on the high frequency side only, for

Re: [time-nuts] Racal 9475 Rubidium

They also suffer from all the typical electronic component age related faults. I had 5 units that had four bad capacitors each, for instance, and after replacing the caps, they run well. Regards, Jerry > On May 1, 2018, at 6:16 AM, Bob kb8tq wrote: > > Hi > > Ok, quick

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

For and RSP? I used an HP 3325 locked to my Cs beam and took the signal from the back. I think I paid no more than $100 for the 3325a and one I got for free. Regards, Jerry > On Apr 11, 2018, at 4:49 AM, jster...@att.net wrote: > > Leo Bodnar GPSDO - adjustable Low-jitter GPS-locked

[time-nuts] timing an ITR master clock

Jerry Hancock je...@hanler.com (415) 215-3779 ___ 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] Introduction, new list member, Ms Tisha Hayes, AA4HA

Yep, 3586B put me in the top list two times I used it along with a calibrated SpectrumLab + PC combo. I’d like to use my IC-7610 this time, have to figure all that out I guess as the April test rapidly approaches UTC time I remember now. Regards, Jerry > On Mar 29, 2018, at 5:21 AM, John

Re: [time-nuts] Ultra low power RTC

I would have thought better. I built a nixie clock from Tubeclocks.com . Granted it is in a pretty constant temperature, but I doubt that clock varies less than 3 seconds per year. Peter, the designer, sent me some code that takes a 1PPS but I never got it running

Re: [time-nuts] Need a Watch Recommendation

An by the way, I also have a Tissot P-touch as a retirement gift from IBM. Got the watch, as they say. I can say it is very accurate for a non-disciplined watch if you wear it every day. Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Mar 5, 2018, at 2:44 AM, Att

Re: [time-nuts] Need a Watch Recommendation

If you are into rugged, I have a casio atomic solar that special forces use… I was able to tail-end a gov’t contract and got it for cheap. aren’t we silly. Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Mar 4, 2018, at 10:38 PM, Don Murray via time-nuts <tim

Re: [time-nuts] unidentified HF time pips

I saw the movie with Cusack. Wondered the same. Probably just ordering toilet paper… Regards, Jerry Jerry Hancock je...@hanler.com <mailto:je...@hanler.com> (415) 215-3779 > On Feb 5, 2018, at 10:09 AM, Eric Scace <e...@scace.org > <mailto:e...@scace.org>> wrote

Re: [time-nuts] unidentified HF time pips

Ha, so I was jumping around looking for the same and found a guy on 15.016Mhz running through random characters phonetically and then signing, “this completes X characters, Horsefly out.” What the heck was that? Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Feb 5, 2

Re: [time-nuts] Si5340 synthesizer chip performance

John, what device did you use for the test? Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Jan 28, 2018, at 4:23 PM, John Ackermann N8UR <j...@febo.com> wrote: > > I received the Si5340A evaluation board from Digikey on Friday and fired it > up

Re: [time-nuts] minimalist sine to square

Tom might have started this as I was playing around with PICDIV and had asked him the best conditioning circuit. Turned out I had all the parts to copy the TADD-2 including the mini circuits transformer so that’s what I did. It works well, pretty sensitive, etc. I’ve also used the bias trick

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

correct when compared to others. The issue with the AD8302 though is that phase deltas below 3 degrees are inaccurate, actually the plots had flats at those phase deltas. Also, since it reports in degrees, you need to change that back to time which I did in a spreadsheet. Regards, Jerry Jerry

Re: [time-nuts] Stable32 now available

header inside but I never saw any activity on it. Overall the units are pretty stable. Have fun! Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Jan 12, 2018, at 11:47 AM, paul swed <paulsw...@gmail.com> wrote: > > Hello to the group. The Stable32 book arrived yest

Re: [time-nuts] Reference input on HP counters

as the external reference is going to have some impact on the device, correct? I’m thinking of in the case where you use a GPSDO that doesn’t have a very good master oscillator. Thanks, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Jan 7, 2018, at 8:05 AM, jimlux <jim...@earthli

[time-nuts] Reference input on HP counters

I’m being a little lazy as I can check the schematics, but in the general case, do HP counters, frequency generators, etc, switch to the external reference when one is available or discipline the internal oscillator? Are there brands of test equipment that generally discipline vs switch?

Re: [time-nuts] A Lady H mystery

polarized tantalum in correctly? Regards, Jerry > On Dec 19, 2017, at 2:20 PM, Dan Rae wrote: > > I've been trying to get LH (V5) to control and set position for the GPS board > in one of my GPSDOs. It is a Trimble "Lassen Ace III" Rx according to > itself. LH auto

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

I have those 9954/9854 boards and the problem is the drivers for newer operating systems past XP aren’t available. The AD9854/9954 boards were clones of the AD eval kits and you downloaded the eval kit software from AD. I got the board(s) working with Windows 7 but it took a lot of screwing

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

Well, if you haven’t selected a DDS and you need I/Q, I would go with the tried and true 9854 as it has I/Q outputs and I thought a 12bit DAC so the resulting spurs and sfdr are lower than other chips, or were, as I think they have 14bit DACs on other chips now. It also depends on the highest

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

I was using PIC chips to talk to AD9854 and 9851 and switched to the low cost Arduino boards as they are so much easier to program and have so much accessible I/O and adapter boards. I know there is a lot of code out there for AD chips as it could be a little tricky to clock the bits out to

Re: [time-nuts] Symmetricom X72 interface boards

What do I owe you? > On Dec 6, 2017, at 9:06 PM, Mark Sims wrote: > > The X72 rubidium oscillator interface board sets have (finally) been shipped > to everybody that paid for them. I had hoped to get them out a couple of > weeks ago, but ran into a couple of annoying

Re: [time-nuts] Rubidium freq standard - temperature

Mark, I agree. I tried scoping some pins. I see a few different levels and one pin has what looks like a clock signal with a period of about 4.2ms. Other than that, hard to tell without a manual. I know people went so far as to contact Perkin Elmer without luck, I had heard they had

Re: [time-nuts] Rubidium freq standard - temperature

I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook something up to it and see if there is anything on 2 or 3, no? > On Nov 30, 2017, at 7:35 PM, Jerry Hancock <je...@hanler.com> wrote: > > I see a jack labeled JT1. It has about 8 pins I reme

Re: [time-nuts] Rubidium freq standard - temperature

I see a jack labeled JT1. It has about 8 pins I remember. I wonder... > On Nov 30, 2017, at 7:11 PM, Mark Sims wrote: > > A lot Rb's from that era have TTL level serial interfaces that can drive most > RS-232 ports directly. The PRS-10, SRO100, and LPFRS are examples. >

Re: [time-nuts] Rubidium freq standard - temperature

ere very very > inexpensive. > Regards > Paul > WB8TSL > > On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock <je...@hanler.com> wrote: > >> Paul, The units Gilbert gave me were TS-RFS. They are fairly large. The >> physics end is about 5”x2”x2" and overal

Re: [time-nuts] Rubidium freq standard - temperature

1) Model number is TS-RFS and they vary for series from A to H, assuming the series is linear as I only have 5 of them. 2) No manual. 3) There is an 8 bit dip switch with a maximum range of about 10mhz and a step of .39mhz. I might have these off by a factor of 10 but I was able to set two of

Re: [time-nuts] Rubidium freq standard - temperature

ey are intended to be mounted on a heat sink. One end > surely looks like that whats would be done. > I believe mine are LCR-10-T. Might have to double check that. > Regards > Paul > WB8TSL > > On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock <je...@hanler.com> wrote: > >>

[time-nuts] Rubidium freq standard - temperature

I was able to get all 5 of these EG Rubidium Frequency Standards running by replacing the caps as another member found. They have a large heatsink on them, no fins, and are running at 43C. Is that too hot? Should I bolt them down to a larger heatsink? They consume a little over 9w after

Re: [time-nuts] Symmetricom X72 rubidium oscillator breakout board now avaiable

Well, I ordered one this morning and I am reading the doc I found online. Please save a set of your boards and if you want to send me some heatsinks, I’ll mill them for everyone. Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Nov 20, 2017, at 12:29 AM, Mark Sims &

Re: [time-nuts] Next upgrade

Based on all the input I think I am going to just save up my mad money for a Cesium and be done with it. (Doubt I’ll ever be “done with it”). > On Nov 22, 2017, at 6:12 PM, Mark Sims wrote: > > The PRS-10 does have disciplining parameters that you can tweak. But the >

Re: [time-nuts] Next upgrade

t;> only had a quick look so far and found that connecting the two together >>> with a 15-pin cable didn't work. >>> >>> Has anyone looked into this ? >>> >>> >>> On Wed, Nov 22, 2017 at 11:01 PM, Bob kb8tq <kb...@n1k.org>

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

Ralph, did I miss something or didn’t you use a pair of the Discovery boards? > On Nov 22, 2017, at 3:38 PM, Ralph Devoe wrote: > > Hi Time-nuts and Attila, > Thanks for the very interesting and informative criticisms. That > is what I was looking for. I don't agree

Re: [time-nuts] Next upgrade

ce but just for interest. I've > only had a quick look so far and found that connecting the two together > with a 15-pin cable didn't work. > > Has anyone looked into this ? > > > On Wed, Nov 22, 2017 at 11:01 PM, Bob kb8tq <kb...@n1k.org> wrote: > >> Hi >>

[time-nuts] Next upgrade

Three questions: 1) Now that I’ve split my Lucent RFTG-U into a REF0 and REF1 unit with both supplying 10Mhz and 1PPS, is there a way to combine the outputs or some other technique to improve the short and/or long term performance? 2) I’ve become interested in Rubidium Disciplined Oscillators

Re: [time-nuts] X72 Heatsink

Mark, I don’t know if I want to do 150 of these like the last time I signed-up for a project like this, but if someone wants their heatsink drilled and milled, send them to me with instructions for the cost of shipping back. If you want to ship the entire case to me, I’ll drill and mill and tap

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

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 <je...@hanler.com> wrote: >> >> I read up on the GPS L1/L2 and I think there is an L5. >> >> And when you say “on the m

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

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 “can be purchased for 1/20th the price of new” like all the other re-purposed toys we buy, Regards, Jerry > On Nov 20, 2017, at 6:43 PM, Dana Whitlow wrote: >

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

take …. > > Bob > >> On Nov 20, 2017, at 6:31 PM, Jerry Hancock <je...@hanler.com> wrote: >> >> One step at a time. >> >> 2yrs ago when the time-bug hit, I had a crystal oscillator. 6 months later, >> DOCXO then GPSDO then Rubidium soon to be

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

ion straight up and let it fall back to you). > An even > more modern approach would be a trapped ion standard. The amount of money > involved goes up dramatically with each of those steps. You get rid of this > and > that subtle effect with each improvement. Accuracy gets bett

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

it > happen. Indeed, the DDS > does also give you some issues. Without some sort of cleanup oscillator, you > will have spurs and > phase noise on the output. > > Lots of fun …. > > Bob > > >> On Nov 20, 2017, at 1:34 PM, Jerry Hancock <je...@hanler.com>

[time-nuts] Why discipline Rubidium oscillator?

I know this is going to sound dumb as I know many GPSDOs had rubidium oscillators in them. I can see why, in that during holdover, they would tend to be more stable vs others, but given that there is a direct mathematical relationship between the rubidium frequency and potentially the 10Mhz

Re: [time-nuts] Symmetricom X72 rubidium oscillator breakout board now available

Mark, do you have an inexpensive sour for the X72? Regards, Jerry > On Nov 19, 2017, at 4:43 PM, Mark Sims wrote: > > I have finished my breakout boards for the X72 oscillator. It consists of > two boards connected by a ribbon cable (or you can remove a header and >

[time-nuts] Read blocks from 5371a

I’ve been playing around comparing my REF0/REF1 with my 5371a. I wrote some code that sets the interval time of 1 second and I can read the first block of data of up to 1000 samples (1000 seconds). All is great. I can’t figure out though, how to read the next block assuming I told it to read

Re: [time-nuts] Absolute phase

When I first powered them on together, they seemed to drift all over the place with regards to relative phase. For the past hour now, they are keeping around 7 degrees and sometimes dropping to around 4. I think that is pretty amazing given all the stuff between the source and final display.

Re: [time-nuts] Absolute phase

I agree. I disconnected it after wondering about the active antenna bias. > On Nov 17, 2017, at 12:35 PM, Magnus Danielson <mag...@rubidium.se> wrote: > > Can work, can go wrong. > > One should be careful and think it though. > > Cheers, > Magnus > > O

Re: [time-nuts] Absolute phase

it > needs to look like an antenna to the GPS receiver, so the antenna alarm does > not goes off. > > Cheers, > Magnus > > On 11/17/2017 09:01 PM, Jerry Hancock wrote: >> Thanks, understand completely. >> You mention “sharing an antenna”. Is there a problem with con

Re: [time-nuts] Absolute phase

If you are not to careful, a GPSDO will do nicely for many applications. The > more you care, the more hassle. > > Oh, and two GPSDOs next to each other can have significant common mode > disturbance, so you can't really evaluate a GPSDO by measuring up to another > GPSDO. >

[time-nuts] Absolute phase

Granted I expect someone on this list to reply with something that makes me feel stupid, if you have two GPSDO units running side by side, should the phase delta on the 10Mhz output be zero (ideally)? Is there an absolute phase standard kept between GPSDO units as all it would take is one

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

Just to close this one out, I was able to get the Ref-0 and Ref-1 working standalone with 10Mhz on both using my spare Motorola UT+ GPS. Lots of help from lots of people and especially Peter Garde who stuck with me to the end. It would be nice if all this was in one place or maybe one combined

Re: [time-nuts] REF1 standalone issue now

OK, go figure, after resetting the loopback jumpers it came alive with a green light, GPS time is ok, still not presenting a satellite on the LH display but it must be seeing something to have the time correct. Interesting project all along. > On Nov 15, 2017, at 12:03 PM, Jerry Hancock

[time-nuts] REF1 standalone issue now

I found the write-up on getting 10Mhz out. I added the resistors and cap and brought it out the 15Mhz connector after separating it from the 15Mhz drive. I booted it up and I have a Yellow No GPS light and a Red Fault. The unit sees the GPS antenna as when I disconnect it the GPS light

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

Is there an easy way to get 10Mhz out of the REF1? Next time I am using my electric screwdriver to take this apart. I can’t believe how many bolts it has. I used a screwdriver that turns double in reverse, pretty cool tool, but even then it took forever. > On Nov 15, 2017, at 7:00 AM, Bob

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

I can’t find the instructions on how to make the REF1 work without the REF0. Other than adding the 10Mhz, do I have to do anything to it to enable it to run without the REF0? > On Nov 14, 2017, at 7:52 PM, Tim Shoppa wrote: > > Isn’t info about what satellites are where,

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

to get the 10Mhz out of the REF1 but that looks easy. Thanks for all the pointers. Jerry On 14 Nov 2017 at 17:33, Jerry Hancock wrote: > Mark, I went back and looked at the PDF from Peter and the Oncore GPS looks > quite a bit > like the M12+ I have. Peter mentions something about

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

Mark, I went back and looked at the PDF from Peter and the Oncore GPS looks quite a bit like the M12+ I have. Peter mentions something about firmware in the Oncore. Anyone know if there would be an issue between using the Oncore and the 12+? If this works then I can just drop in my 12+,

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

I remember seeing that pdf and thinking that the Motorola UT+ mounts look a lot like the Motorola 12+ and was wondering if would just fit. I'll go back and look. Thanks. On 15 Nov 2017 at 0:38, Mark Sims wrote: > There is also a nice pdf out there by Peter Garde that tells how to add a GPS

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

ant to insert some 1PPS signal to discipline it, you need some > fake some GPS messages. Dan has done some nice work here, a small ATTiny > is sufficient. > > /Thomas, SA6CID > > > On Tue, Nov 14, 2017 at 08:30:54AM -0800, Jerry Hancock wrote: >> Bob, I thought you had

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

(it was one of the TAPR GPS Kits) to send the other one the 1pps. You’re saying all you need is a plug? I would need two functioning units. Regards, Jerry Jerry Hancock je...@hanler.com (415) 215-3779 > On Nov 14, 2017, at 8:13 AM, Bob Camp <kb...@n1k.org> wrote: > >

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

it and can easily drive 16 devices. Regards, Jerry > On Nov 13, 2017, at 8:50 PM, Jerry Hancock <je...@hanler.com> wrote: > > Anyone have a spare cable for the Lucent setup? I guess I can make one with > some DB15 connectors but trying to skip the ef

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

Anyone have a spare cable for the Lucent setup? I guess I can make one with some DB15 connectors but trying to skip the effort. Thanks Jerry ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Tek 11301 DOCXO

I was given a Tek 11301 that after tons of work, I can’t fix and seems to be getting worse. It has the high stability option that looks like an ovenized oscillator in it. Are these worth pulling out and mounting as a separate source? I have a GPSDO and also a second GPS with 1PPS output. I

Re: [time-nuts] Problems with TAPR Oncore M12+ kit

he part a fixture and then mill the >> edges. >> >> But that said, I could make a pair of these by hand with hack saw, file and >> drill press in about 15 minutes. >> >> >> >>> On Fri, Apr 28, 2017 at 1:41 PM, Jerry Hancock <je...@hanle

Re: [time-nuts] HP 4815 Vector Impedance Analyzer repair

Rick, I have two, one I repaired yesterday using parts from the second. Since acquiring both of them about 4yrs ago, I’ve had to repair the “working” unit five times including the first time when I picked it up. Unlike other HP equipment I own, this thing hasn’t been as reliable. Luckily

Re: [time-nuts] The clocks at Windsor Castle, UK

I’m missing something here. Advancing the clocks 11 hours is the same as setting it back one hour. There was an article about a person that had 300 clocks with the same problem and I don’t understand the issue and I might be overlooking something or not remembering it correctly. If you have

Re: [time-nuts] TAPR GPS Experimenters Kit

I noticed when I powered it up that the TX light blinked whether there was a PC connected or not, so I guess the PC doesn’t need to poll it for a response. I assume you have the voltage set correctly? There are two options, one regulated and the other not. I also assume you have tried POR a

Re: [time-nuts] PPS sync

That makes complete sense, it’s not disciplining anything, just pumping out the PPS and reporting the variance. I don’t know why I didn’t think of it. It’s interesting how it jumps around from PPS to PPS. Thank you, Jerry > On Jun 7, 2017, at 2:57 AM, Hal Murray

Re: [time-nuts] PPS sync

t uses an oscillator edge to trigger PPS. It other words > what you see is a design feature not an error. > > On Mon, Jun 5, 2017 at 6:40 AM, Jerry Hancock <je...@hanler.com> wrote: > >> It was off 7.5KM, that’s a little beyond groggy, no? More like a trip to >> Vegas

Re: [time-nuts] PPS sync

It was off 7.5KM, that’s a little beyond groggy, no? More like a trip to Vegas. I’ll let it rerun the survey and see if it gets closer. > On Jun 4, 2017, at 9:50 PM, Mark Sims wrote: > > Be careful when using one unit's location to set a different model's > location...

[time-nuts] PPS sync

1) I have my TAPR M12 Kit working now next to my lucent RFTG-U REF0/1 pair. I was comparing the PPS outputs triggering on the Lucent as channel 1 and the M12 as channel 2. I can’t tell which is moving around but the symptoms are that at T0 (not the top of the minute or hour) they are in sync

Re: [time-nuts] Rack needed in SF Bay Area

Thanks, just what I need and the right price range. > On Jun 3, 2017, at 9:02 PM, Lincoln <linc...@ampmonkeys.com> wrote: > > There is also Halted off of central expressway > > >> On Jun 3, 2017, at 8:32 PM, Jerry Hancock <je...@hanler.com> wrote: >> &

[time-nuts] Rack needed in SF Bay Area

Anyone in the SF bay area have a rack that is surplus to your needs? Please reply to cl...@hanler.com thanks Jerry ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and

Re: [time-nuts] TAPR GPS Experimenters Kit

Greg, Funny. Some of the lucent boxes have been in strange places as well. Can you please check your PPS to see if you get a signal when in that other mode (where it needs at least one sat locked)? > On Jun 2, 2017, at 5:13 PM, Gregory Beat wrote: > > Received a note from

Re: [time-nuts] The future of Telecom Frequency Standard surplus

Tom, Another question is will the surplus equipment have the same value to the hobbyist? I have a lot of old gear like spectrum analyzers, scopes, signal generators, etc that was outdated and sold for cheap. I keep wondering if the same economics will apply to the equipment that is for

Re: [time-nuts] GPS Kit Plates

Greg, to which adapter cable are you referring? From the PC to the DB9? What I did in the meantime was use breadboarding jumpers. The square female ends typically will press onto the DB9 male pins. Glad they fit your need. Steve, sounds like there won’t be another round? Jerry > On May

[time-nuts] GPS Kit Plates

Hello again, fellow curmudgeons, I sent out more shipping notices this morning and plan to hit the PO in about 5 hours. When you receive your plates and prior to mounting, please clean them with soap and water or even windex or simple green. I cleaned the machine oil off to the limit of my

Re: [time-nuts] GPS plates shipped today

to thank the both of you for putting this together. > > Philip > > p.s. I signed up with the USPS some time ago to get email whenever someone > ships a package to me (https://my.usps.com/) and I just got the notification > (with the tracking number). > > On 25/05/2017 1

[time-nuts] GPS plates shipped today

Hello fellow curmudgeons, Today I shipped the plates to the people that have paid both Steve and me. For those that elected the flat rate shipping, they will arrive in a few days, maybe even Saturday, if not, Monday. Those that elected the lower cost alternative should arrive no later than

Re: [time-nuts] TAPR GPS kit end plates update

Hear! Hear! This project was a lot more work than either Steve or I imagined and though it seems like only a small sum to each individual, when aggregated it becomes a burden that Steve shouldn’t have to shoulder. Thank you! > On May 25, 2017, at 9:54 AM, Steve - Home

Re: [time-nuts] TAPR GPS kit end plates update

You shouldn’t have to enlarge the holes. I trial-fit the lenses from the unit I received in the holes that I drilled to specifications in the document at approximately .28”. The lenses add a professional look to the front plate. Jerry > On May 21, 2017, at 3:42 PM, Steve - Home

[time-nuts] time.gov reply from NIST

orrect. Thanks for the information! Please keep in touch. Andrew Novick NIST (xxx) xxx - phone removed by Jerry On 5/12/2017 11:15 AM, Jerry Hancock wrote: > Hello, > > I am a member of a group of individuals called time-nuts. Most of us have > atomic clocks or at a minimu

Re: [time-nuts] time.gov

entarily saw the >> phone 65 seconds ahead of the computer. After hitting refresh and >> going off wireless and directly to my carrier, the phone matched the >> computer. I had a witness but cannot get the problem to reappear. I >> don't know exactly why the problem went awa

Re: [time-nuts] time.gov

Since the application takes into account the network speed, maybe there is a cacheing issue initially that is then corrected when you refresh the page? It’s no longer doing it now but was for several hours earlier today. Strange. ___ time-nuts

Re: [time-nuts] time.gov

off wireless and directly to my carrier, the phone matched the > computer. I had a witness but cannot get the problem to reappear. I > don't know exactly why the problem went away. Some servers may cache > web pages so refresh may be necessary. > > πθ°μΩω±√·Γλ > WB0KVV &

[time-nuts] time.gov

I went to time.gov today as I was sitting away from my lab when a new watch arrived. Finally got the 25yr watch from the company that laid me off a week later… Anyway, I set the seconds rollover to 00 when time.gov reset and then walked down to my lab and noticed the watch is now 6 seconds

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

Tim, I understand all about TDRs, was doing communications cable tests going back to '76 at IBM. This was a simple experiment to show my son (who is thinking of becoming an engineer) how precise certain equipment is. > On May 8, 2017, at 6:03 AM, Tim Shoppa wrote: > >

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

I tried reading the 5335 over GPIB. In the case where I am measuring frequency I get the expected number of digits. In the case where I am measuring A->B, I only get nanoseconds (e.g 3E-9; or 4E-9). On my scopes, I was able to measure the delta at 3.28 nanoseconds with both scopes close

[time-nuts] Using 5335 frequency counter for timing

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 offset and was then thinking the 5335 could do it more accurately, but I was wrong, as it only reports to the nanosecond. I thought

Re: [time-nuts] TAPR Oncore M12+ kit

ps.com/images/stories/pdf/tapr%20gps%20kit.pdf> > > The one that is the bigger issue is the “front” that has the D hole and a > connector > for a normal 9 pin serial connector. > > Bob > > > > >> On Apr 28, 2017, at 3:19 PM, Jerry Hancock <je.

Re: [time-nuts] TAPR Oncore M12+ kit

nterest in a fully hogged out set than in the > “drill it yourself” > approach. That assumes the cost does not go through the roof. The previously > quoted cost puts the plates at roughly half the cost of the kit they mate up > with. > > Bob > >> On Apr 28, 2017

Re: [time-nuts] TAPR Oncore M12+ kit

do they need to be inset as in the drawing or will a flat piece of aluminum work? I have some .25 thick aluminum. I could mill a pocket which would add to the design and then mill the holes for the components. That would take more machine time is all. Generally, the way I mill plates such

Re: [time-nuts] TAPR Oncore M12+ kit

Is there a way I can help with this project? If I had the specs to look at, maybe I would be able to run off a bunch of plates. If we could batch them up I would do them for the cost of shipping. Does anyone have a dimensioned print, picture, cad drawing of the plates? > On Apr 28, 2017,

Re: [time-nuts] Frequency counter questions

I don’t know what I was thinking when I asked this question as we don’t control the gate timing in a referenced counter. > On Apr 26, 2017, at 3:59 AM, Bob kb8tq <kb...@n1k.org> wrote: > > Hi > >> On Apr 26, 2017, at 12:29 AM, Jerry Hancock <je...@hanler.co

Re: [time-nuts] Frequency counter questions

Do typical frequency counters start their gate in phase with the incoming signal? I guess the answer would be, "It depends." I was just thinking about how I would program the STM32F7 counter I am designing. btw, Gilbert, a local time-nut, sold me a 5335 today so I will be able to buiild

Re: [time-nuts] Frequency counter questions

So the STM App note An-4776 teaches how to use an external clock and it looks pretty accurate in implementation. I’ve read thru the code and it looks easy to implement. Now I just need to bring another signal in and count it. I’ll be working on some code this afternoon to implement the

Re: [time-nuts] Frequency counter questions

Bob, I have an STM32F769 disco as well as the Nucleo version. The big difference between the two is the LCD display on the Disco from what I remember. I’ll play around with the code this week and report back. ___ time-nuts mailing list --

Re: [time-nuts] Frequency counter questions

Orin, Thanks, this goes beyond interesting and I don’t know how you found it. I’ll be staring at this doc for the rest of the week. I have a dozen or so of the Nucleo boards around include the high end F7 types so I’ll see if I can duplicate their code on the System Workbench they reference

Re: [time-nuts] Frequency counter questions

This is an exercise more than anything. It started when I noticed the counter in a 3586B I purchased was +1 count unless I dropped the input frequency .25hz. I was using my GPSDO reference for it and the 3336 it was counting. I then took my GPSDO and tried reading that directly and I see the

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