Re: [time-nuts] End of Range Oscilloquartz 8600-3

I got into the package out of the dewar of my FTS 1200-100 without breaking it: https://photos.google.com/share/AF1QipPxJF0Fn6_ gSjXQzk3OhoAhvgqizxmo4A41bIdyk8FrpkNIOfW5Q5feLwLsO4od8Q?key= NmRRejU0eEYtVUQ4ZURTMnE4cXZEOWtIVmtQZTZB -ch 73 de AI6KG On Tue, Dec 12, 2017 at 3:50 PM, Magnus

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

> > When I saw how badly they handled the external REF-in I (my company) have one of these. Can you say more? re: SRS, I ran into the CEO -- I have forgotten his name and misplaced his card -- at a local office supply store in Mountain View near the end of 2016. I was behind him in a long'ish

Re: [time-nuts] Novatel Dual frequency GNSS receivers on ebay

er specifications. I'm guessing > this product is mostly designed for the PN part of PNT (Positioning, > Navigation, Timing)? > > /tvb > > - Original Message - > From: "Christopher Hoover" <c...@murgatroid.com> > To: "Discussion of precise time and f

Re: [time-nuts] Novatel Dual frequency GNSS receivers on ebay

I have quite a bit of experience with Novatel hardware include OEM6, CPT and SPAN. CPT is an IMU made by KVH and relabeled by Novatel.The accelerometers are MEMs and the roll rate sensors are FOGs. Pretty old design. Performance is decent (but not auto alignment good).

Re: [time-nuts] Special connector for Symmetricom X72 rubidium standard

I'm interested in a piece or two if you do this. Happy to review schematics and layout, too. -- Christopher AI6KG On Tue, Aug 15, 2017 at 8:28 AM, Mark Sims wrote: > Symmetricom sold some interface boards for the X72. They are 0.32-ish > inch thick PCB's with a dual

[time-nuts] Can I haz an anti-hydrogen maser now?

http://www.swansea.ac.uk/media-centre/latest-research/firstobservationofthehyperfinesplittinginantihydrogen.php ___ 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

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

On Jul 16, 2017 4:49 PM, "Brian, WA1ZMS" wrote: FWIW.We're at an 11 yr low for solar activity. Thus no big suprise that 25MHz is not covering the US very well, but a rare opening is always possible. +1 de ai6kg ___ time-nuts

Re: [time-nuts] 5370B Question / help needed

sorry, folks. i meant to sent that directly to mark. On Sun, Jul 2, 2017 at 3:49 PM, Christopher Hoover <c...@murgatroid.com> wrote: > HI Mark, > > >> If you need to troubleshoot the unit, I have a few extender card kits >> left... $30+shipping for the three boar

Re: [time-nuts] 5370B Question / help needed

HI Mark, > If you need to troubleshoot the unit, I have a few extender card kits > left... $30+shipping for the three board set. I'm interested. Waht is the shipping to 94040 residential? Thanks, -ch 73 de AI6KG On Sat, Jul 1, 2017 at 1:23 PM, Mark Sims wrote: > This

Re: [time-nuts] Power Connectors and D-Subs...

eaper or easier to get than the uber > D’s. At least they > give a bit better density. > > Bob > > > On Jun 26, 2017, at 9:19 PM, Christopher Hoover <c...@murgatroid.com> > wrote: > > > > On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq <kb...@n1k.org> wrote:

Re: [time-nuts] Power connectors continued

> > They will definitely not work loose. ODU or Glennair (I forget which) has a ratcheting lock ring on some of their connectors. It has asymmetric ramps on the ratchet cam that tighten the lock ring under vibration. -ch 73 de AI6KG On Fri, Jun 23, 2017 at 9:01 PM, Charles Steinmetz

Re: [time-nuts] Power Connectors and D-Subs...

On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq wrote: > Hi > > Cost a fortune *and* can easily get you into 12 week delivery times …. > oh lord. tell me about it. we need to put lemo's in the same bucket -- expensive and long lead times. (they are so expensive there are

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

+1 to abtime On Thu, Apr 20, 2017 at 1:35 PM, Tom Van Baak wrote: > Jim Palfreyman writes: > > > Consider a plot of a timing residual vs time. Say a watch against a > maser, > > residual=watch-maser. > > We usually don't use the word residual for this. When you compare a

Re: [time-nuts] Spirent STR4500 GPS simulator

I would check if the instrument contains a FDTI USB to serial converter part with a custom VID/PID. That's a common trick. That's trivial to work around, at least on Linux. -ch 73 de AI6KG On Wed, Apr 5, 2017 at 1:05 PM, Bob kb8tq wrote: > Hi > > > > > > On Apr 5, 2017, at

[time-nuts] TDC-GPX2 TDC chip

http://ams.com/eng/Products/Precision-Time-Measurement/Time-to-Digital-Converters/TDC-GPX2 Claims to have single-shot accuracy of 10 ps. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] 33120A purchase off epay

My HP 33120A Function Generator died. (I'm still trying to fix it, but it isn't obvious what's wrong ... rails check so I'm suspicious the EEPROMs gave up the ghost.) I bought a new one on epay week befor last for a fair price. It arrived and I was surprised/excited to find it had the external

Re: [time-nuts] TTimelab question

One way to do cheap, short-run enclosure costs is to use extruded aluminum cases of this sort . They extrusion only needs to be cut to length. It is completed with a front and back panel that is just

Re: [time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards

> > The Intel guys have some *very* fast timers flying around their cpu’s. > They would laugh > at the idea of a 10 or 100 MHz clock. If you can configure the pin to grab > the data off those timer, you > have way better than 100 ns at the timer. We're most certainly getting off topic, but the

Re: [time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards

On Thu, Feb 16, 2017 at 10:42 AM, Christopher Hoover <c...@murgatroid.com> wrote: > Ntp has support to pick up hardware packet timestamps from the Linux > kernel. I wrote the patch; it was merged years ago. > > I'm wrong about this. The patch I wrote added support for SO_T

Re: [time-nuts] ``direct'' RS-232 vs. RS-232 via USB vs. PPS decoding cards

Ntp has support to pick up hardware packet timestamps from the Linux kernel. I wrote the patch; it was merged years ago. -ch 73 de AI6KG On Thu, Feb 16, 2017 at 9:59 AM, Denny Page wrote: > If your Ethernet chipset (mac or phy) has timestamping capabilities, you > can

Re: [time-nuts] Sub-ps delay line

is it possible to run each ADC using whatever phase of the common clock you have, measure the local phase differences between ADC's periodically, and then work out the necessary sample offsets for the ensemble in software? this ought to be more robust than trying to hold everything fixed over

Re: [time-nuts] Reproducibility of position data from multiple surveys of HP 58503A GPS receiver

My 58503A was showing an alarm when I came into the shack this morning. (I forgot to jot down the text on the display.) I cleared the alarm (Shift-Alt) and it otherwise seems 100% happy. -ch 73 de AI6KG On Sun, Jan 1, 2017 at 7:02 AM, Dr. David Kirkby - Kirkby Microwave Ltd <

Re: [time-nuts] pcb protos

+1 on Sunstone +1 on Screaming Circuits, who will SMT the board with consigned parts or even do a full turnkey build. Been happy with them on both accounts. I don't know how many of these super cheap places will do full electrical check -- I want it on my personal boards. On Fri, Dec 9,

Re: [time-nuts] TICC Timestamping / Time Interval Counter -- Available to Order

Thanks, John!Just ordered two and looking forward to receiving it. 73, Christopher de AI6KG On Wed, Dec 7, 2016 at 11:45 AM, John Ackermann N8UR wrote: > I'm happy to report that TAPR is now accepting orders for the TICC > timestamping / time interval counter. We've placed

[time-nuts] TDC7201

TDC7201 appears to be the same as the TDC7200 except that there are two synchronized TDC cores and each TDC core has two extra "coarse" bits. The eval board for TDC7201 (p/n TDC7201-ZAX-EVM) is $75. You need a ~$25 MSP430 baseboard to make it go. -christopher 73 de AI6KG

Re: [time-nuts] Inside of FT1200-100

OK, I think this folded-over cap sets the nominal XO frequency: (link in case it doesn't go through: https://goo.gl/photos/XHUCKTnC3NAB5rKD6 ) I read the p/n as CY06C240J. 24 pFs? CGW would seem to be Corning Glass Works. On Wed, Nov 23, 2016 at 8:57 AM, Tom Van Baak

Re: [time-nuts] Inside of FT1200-100

And of course it is a discontinued part. Taking suggestions for a replacement. COG(NP0)? On Wed, Nov 23, 2016 at 12:25 PM, Christopher Hoover <c...@murgatroid.com> wrote: > Part number decoder on page 4 of: > > http://www.mouser.com/catalog/supplier/library/pdf/AVXGlassDielec

Re: [time-nuts] New Timestamping / Time Interval Counter: the TICC

That TI TDC7200 really is a nice part. Neat project! Will buy . Two thumbs up. On Wed, Nov 23, 2016 at 7:48 AM, John Ackermann N8UR wrote: > Counters with resolution below 1 nanosecond are difficult. They require > either outrageous clock speeds, or interpolators that are

Re: [time-nuts] How can I measure GPS Antenna quality?

> I'd like to try something like a Voronoi tessellation, but that gets rather nasty to implement.. There's a boost library... ___ 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] Inside of FT1200-100

o.com] On Behalf Of Christopher Hoover Sent: Saturday, November 19, 2016 11:45 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Inside of FT1200-100 tl;dr: I've made some progress and have the1200 oscillator core out of the dewar: https://goo.gl/photos/SDHtvgFmftQq6vYJA

Re: [time-nuts] 53132 replacement fan

I was able to cross it easily to a well-known fan manufacturer's part. If someone doesn't chime in, I'll dig through my notes and get you the details. -christopher. 73 de AI6KG On Sun, Nov 20, 2016 at 11:14 AM, John Ackermann N8UR wrote: > Does anyone have a part number for the

Re: [time-nuts] Inside of FT1200-100

ler gauge, but also using some naptha (lighter fluid) > to help release any adhesive... I didn't get around to doing > it, but that was the way I was going to progress. > > -Chuck Harris > > Ed Palmer wrote: > > > > > > On 2016-09-26 10:00 AM, Christopher Hoov

Re: [time-nuts] Questionable content webcomic channels some time nuttery

+1 On Nov 7, 2016 4:05 PM, "Gregory Maxwell" wrote: > http://questionablecontent.net/view.php?comic=3346 > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ >

Re: [time-nuts] I love the smell of tantalum in the morning

+1 I only use tweezers for removal. I use the one-side-then-the-other technique described elsewhere in this thread for mounting parts. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Time nut soon to be in Shenzhen

I'm in Shanghai now but will be leaving for Shenzhen in a few days. Any one know of any special time nutty stuff to check out in Shenzhen? I expect if I can find the right place I might see piles of OCXO's. Thanks, Christopher and 73 de AI6KG ___

Re: [time-nuts] I love the smell of tantalum in the morning

Ditto. I use hot tweezers -- metcal talon handpiece, in my case. There are other ways to do it if you don't have them. On Nov 6, 2016 3:21 AM, "jimlux" wrote: > On 11/5/16 12:12 PM, Tom Van Baak wrote: > >> See C13 in the attached photo. I need to replace some blown

Re: [time-nuts] Opening an Isotemp OCXO

I got one open without too much much trouble with a propane torch. Work fast, use gravity and have something pointy to pry with as you go. -ch 73 de ai6kg On Oct 18, 2016 6:14 AM, "Peter Reilley" wrote: > I bought an Isotemp OCXO82-59 with a frequency of 10 MHz for a

[time-nuts] Roughtime

I just learned about this from a public post: https://roughtime.googlesource.com/roughtime/ Not precise enough for us nuts, but intended to be secure. (I wonder how it handles leap seconds? Too soon? :-) Actually, it smears.) -christopher. de AI6KG

Re: [time-nuts] Inside of FT1200-100

On Wed, Sep 21, 2016 at 10:05 PM, Ed Palmer wrote: > > You might be able to slide something like a feeler guage down between the > oven and the rubber blanket to break the oscillator free. The oven on mine > is a plain metal cylinder. This way, the rubber sheet should

Re: [time-nuts] Inside of FT1200-100

; controller, and the output buffer. > > You need to get into the tiny vacuum thermos > bottle where all of the wires go. > > -Chuck Harris > > Christopher Hoover wrote: > > Top of the board stack > > > > https://goo.gl/photos/cUBtdTYHHWX4ZRbx8 > >

[time-nuts] Inside of FT1200-100

Top of the board stack https://goo.gl/photos/cUBtdTYHHWX4ZRbx8 ___ 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] time-nuts Digest, Vol 146, Issue 13

> > > Message: 2 > Date: Mon, 5 Sep 2016 19:48:14 -0700 > From: "Richard (Rick) Karlquist" > To: Discussion of precise time and frequency measurement > > Subject: [time-nuts] Hobbyist grade or homebrew temperature testing > chamber? >

Re: [time-nuts] Adjusting nominal frequency of FTS 1200-100 OCXO?

the contacts. > I had to re-solder each of them carefully twice to get it working reliably. > > Regards, > Adrian > > Christopher Hoover schrieb: > > I've been debugging a FTS 4050 with the 5000M module. > > > > It looks like the problem is the FTS 1200-10

Re: [time-nuts] Adjusting nominal frequency of FTS 1200-100 OCXO?

Thanks, Corby. That was my guess. Is this cap buried in the styrofoam block? (Cue "we need to go deeper" meme.) -christopher 73 de AI6KG On Mon, Sep 19, 2016 at 10:18 AM, wrote: > Christopher, > > The only way is to open the oscillator up and reselect the capacitor they

[time-nuts] Adjusting nominal frequency of FTS 1200-100 OCXO?

I've been debugging a FTS 4050 with the 5000M module. It looks like the problem is the FTS 1200-100 OCXO. It seems to have aged to the point that it is very low in frequency. (Chuck Harris reported a similar situation a long time ago.) I have it out of the 5000M and determined that I need to

[time-nuts] 5061B Service Manual, Page 8-57 (BEAM I, if LOW)

My 5061B (with FTS tube) has a low beam current. Maybe 7 on the meter when adjusted onto the primary peak. I bought the Ops and Service manual, but my copy is missing page 8-57 (and 8-56 if that exists). I'll send a complaint/request to Manuals Plus, but in the meantime can anyone share a scan

Re: [time-nuts] time-nuts Digest, Vol 72, Issue 24

On 7/6/2010 11:13 PM, J.L. wrote: I could not find any cross reference for either of these NPN transistors but the 2NA seemed to do just fine. Thanks for everyone's help. Joe 1854-0003 (subsequently replaced by 1854-0637) crosses to Moto/On Semi SS2199. 1854-0023 cross to 2N2484

Re: [time-nuts] time-nuts Digest, Vol 72, Issue 38

On 7/9/2010 7:58 PM, Bob Camp wrote: For around $4 or so you can get a CPLD and socket that will replace all of the logic chips. They will run on +5 and go to 100 MHz. My guess is that they would be a bit more repeatable. The downside is it's another part to program. Yep.I ordered a

Re: [time-nuts] time-nuts Digest, Vol 70, Issue 31

On 5/12/2010 10:41 AM, Jim Lux wrote: It never occurred to me that they might couple, although almost every other mechanical clock does. What would the mechanism be? Perhaps if all of them run off the same reservoir ___ time-nuts mailing

Re: [time-nuts] Simple PLL chips, gone ?

On 5/4/2010 5:00 AM, Luis Cupido wrote: that is something that is easy to source (known to be in production etc) easy to source and known to be in production are very much a mixed bag lately. after the economic slow down, many plants in china and other locales let large numbers of

Re: [time-nuts] endace time disribution server tds-2

On 4/27/2010 5:00 AM, Anthony Blake tony...@gmail.com wrote: I was disturbed by their implementation of RS422*without* a ground return path.. Am I missing something, or is that really dodgey for distributing PPS? Yes, it is dodgey. You can make it work without a ground, but it is not

Re: [time-nuts] *nix (was Re: Simulating Oscillator Noise:, DifficultiesSimulatingFlicker FM Noise)

On 4/25/2010 9:34 PM, time-nuts-requ...@febo.com wrote: You didn't get me right... UNIX (and offspring Linux) is not dying, but Xenix, SunOS, Ultrix, OSF/1, HP-UX, IRIX etc. is dying or dead. HP-UX is still alive and kicking (on Itanium now, not PA-RISC). -ch

Re: [time-nuts] 5370A vs 5370B

On 3/9/2010 10:09 PM, John Allen j...@pcsupportsolutions.com wrote: Hi Mark - do you have a source or part number for the fan? I seem to remember that the manuals says 35 or 37 cfm. Without a pressure drop, cfm is is not sufficient to find an adequate fan. I can put a 5370A/B on a flow

Re: [time-nuts] Vremya-ch Hydrogen Masers

On 3/1/2010 9:32 PM, time-nuts-requ...@febo.com wrote: Anyone here have any experience with these masers? In particular the VCH-1005A? I have been tasked to look after a number of these units and am currently going through the manuals (which are in English but written by a Russian, so they can

[time-nuts] 5071A question

We time nuts, and time labs worldwide too, recognize the 5071A as an amazingly accurate and precise instrument as well as an extraordinary industrial product with these same qualities repeated many times over and over. Most of us know the product was transferred from HP/Agilent to

Re: [time-nuts] CPLDs for clock dividers

Paul Swed wrote: Well not having a lot of luck with the xilinx wise application. Its a 6.5 GB tar and after a good 5 hr plus download the tar doesn't open with zipgenious But 6.5 GB to work a cpld. Seems crazy to me. The web installer will let you do a partial install. Bear in mind you

[time-nuts] z3816a running on 12V

I hadn't seen this mentioned anywhere else, so I thought I point out that the Z3816A, at least the one I have that is spec'ed to run on 20-72V, will run on 12V, if you change the settings of DIP switch S1 on the power board. Normally S1 is set with switches 34 on (24A on the silkscreen) and

Re: [time-nuts] Digital Clock kit - no Integrated circuits!

On 1/8/2010 6:27 PM, time-nuts-requ...@febo.com wrote: You must see it to believe it! I won't buy one until it comes in surface mount.I *hate* flipping PCBs over and clipping leads. ;-) -ch ___ time-nuts mailing list --

Re: [time-nuts] LH and virtualization (was: time-nuts Digest, Vol 66, Issue 10)

On 1/4/2010 2:47 AM, Steve Rooke wrote: Are you thinking about running it inside a Windows VM on top of another OS? Yes. I have one non-virtualized Windows install. But it is on my laptop and as my laptop never stays in one place, it is not a good host for longer running processes,

Re: [time-nuts] time-nuts Digest, Vol 66, Issue 6

On 1/3/2010 5:53 PM, time-nuts-requ...@febo.com wrote: It's not an issue, except possibly vis-a-vis battery life in a laptop. I haven't looked at the source code, but there are other concerns with the while (true) { checkStuff(); Sleep(0); } approach. According to the TFM, Sleep(0) is

[time-nuts] [OT] short run cable assembly vendor?

Sorry for the off-topic post, but ... I'm looking for a vendor who can make a couple of simple power cable assemblies for me. The first is from a IEC C14 power entry module to an open frame supply board-in (Molex 26-48-1035 style) and ground pigtail. The second is from the open frame

Re: [time-nuts] NMEA time

Hal Murray wrote: Yes, mostly. PCs have two nasty disadvantages in terms of time keeping. One is that the CPU clock is typically using spread spectrum to make the EMI shielding (a lot) easier. The other is that the temperature at the crystal depends (a lot) on what the CPU is doing.

Re: [time-nuts] The Demise of LORAN (was Re: Reference oscillator accuracy)

David I. Emery wrote: I have emailed my brother in law who is a rear admiral (I think now called a vice admiral) and currently CFO of the USCG (and as a note re your alma mater a MIT Sloan grad) and rather loudly said so myself. He most likely was part of the group that made the decision... I

[time-nuts] z3804a

here's one i haven't seen before. it's on on eb*y -- 280416557414 there's a 10811a, what i'm guessing is some sort of disciplining circuit and 12 output channels anyone know if you feed it 1PPS or 10MHz? i'm guess the latter, presumably from a z3801a. sadly too pricey for my taste.

Re: [time-nuts] Datum 2100L issues

Mark Kahrs wrote: I'm finally trying to get this epay 2100L time server to go. First step was to talk to it, change the host number and then see what I had... It appears to me (or it, depending on who you ask), that two satellites are in view, to wit: 26 ? sig 09 0.000 04 17.604 10

Re: [time-nuts] upgrading agilent 53132 counter

On 1 October AL1 wrote: i would upgrade my 53132 with an OCXO 10811, i have the module, but i was told i have to change the power supply too. It's yet the original HP 0950-2496 from Delta, model : DPS-43DL-2 (47 Watts). That's the same supply in my 53132A and at least one of my

[time-nuts] HP 00105-6100 figures

Silly me. I remembered that I had a late edition 105A/B manual. It took me some time to find it, but look what's in the change notes: http://www.murgatroid.com/t_and_m/hp-00105-6100-figs.pdf I think you'll find the schematic readable; the photos, otoh, are marginal -- they were not great

[time-nuts] 05061-6174 00105-6044

Anyone have schematics for the 05061-6174 00105-6044 boards? These are used to replace the pre-10544 oscillator (the one with A/C warm up) with a 10811 in a 105A/B, also presumably in a 5061A given the p/n. Thanks, -ch ___ time-nuts mailing

Re: [time-nuts] 5071A sensitivity to orientation (was Re: OCXO sensitive to gravity)

Rick Karlquist wrote: Len Cutler put in a fix to mitigate against this in the 5071A CBT. How so? Is there a 3-axis accelerometer in the 5071A? -ch ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] HP 106B quartz frequency standard...the story so, far

The 2N1701 is a general purpose transistor rated at 60V, 2.5A. I've mentioned this before, but it bears repeating. If you are having trouble with an old school linear power supply, in many cases you can replace the TO-220 PNP pass transistor *and* the reguatlor circuit (based on a 723 or

Re: [time-nuts] [OT] Help needed with HP 16700A

Peter Loron pet...@standingwave.org wrote: I have a HP 16700A logic analyzer that I'm trying to troubleshoot. I can get access to the console via the serial port, and I can see that it boots up normally, except that it fails to start the X server, and drops to a login prompt for which I have

[time-nuts] TubeSat Personal Satellite Kit

Anyone want to chip in and launch some clocks? :-) http://spacefellowship.com/2009/08/01/interorbital-syatems-tubesat-personal-satellite-kit/ Excerpt below. -ch Interorbital Systems -- TubeSat Personal Satellite Kit

Re: [time-nuts] 5087B (was What's the cleanest way to produce 1 and 5 MHz from 10 MHz?)

From: Lux, James P (337C) james.p@jpl.nasa.gov wrote: There's slots for three input modules (A,B,C), and 10 output modules (1-10), and they're all optional and easily reconfigurable. Just to be clear, the modules themselves aren't reconfigurable, but the mainframe is. That said, the

[time-nuts] e*ay: AUSTRON MODEL 1210D-O1 CRYSTAL CLOCK OSCILLATOR

item # 220403183258. listing says 3 available. nice, but a little too spendy for me. -ch ___ 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

Re: [time-nuts] surplus carrier phase measurement-capable receivers (was Thunderbolt firmware differences)

I wanted to have Heather make a RINEX file that could be submiited to OPUS-GIS to get a more precise antenna location. The Tbolt does not support carrier phase measurements. It does output doppler values. The code phase (pseudorange) values that it outputs look to be VERY difficult to

[time-nuts] Z3817A manual or details?

Anyone else playing with one of these Z3817A boxes that are/were available on that marketplace which shall not be named? The Z3817A appears to be essential a discipling box for an E1938. I'm still not sure yet what the disciplining input is. I'd love a manual, but I haven't found one

[time-nuts] AD9548 - Clock IC Generates Up to 400 MHz from 1 PPS GPS Signal

[fyi -- this may be of general interest, but n.b. that this A.D. marketing - ch] Clock IC Generates Up to 400 MHz from 1 PPS GPS Signal The AD9548 http://www.analog.com/en/clock-and-timing/clock-generation-and-distribution/ad9548/products/product.html is the first clock chip in the

Re: [time-nuts] 5070B once more.... (actually 5370A fans)

Magnus wrote: Having 1-10 kW per rack is not uncommon these days, so forced convection needs to be done That and more. A fully loaded 42U rack of HP C-class blades runs 8 kW idle and peaks at 24 kW. This can be air cooled (easily) in a properly designed and commissioned run-of-the-mill

Re: [time-nuts] Austron 2100F

Chuck Harris cfhar...@erols.com wrote: They can be very hard to fix, because there is some really poorly designed logic circuitry, and the signature analysis functions really can't find very many problems. Interesting. Can you say more? I tried to repair mine -- I have a signature

Re: [time-nuts] time-nuts Digest, Vol 56, Issue 54

All this talk of legal time is interesting, but I am hoping we will soon return to more important matters, like phase locking CD players and plasma screen dot clocks to CBTs and the best commercially-available phase-stable speaker cabling. :-) -ch

Re: [time-nuts] Initial release of Lady Heather for Windows

John Miles wrote: Thanks for the confirmation -- I don't believe anyone else has tried it on Windows 7 before. Did you have to run it as admin? Christopher, I imagine there's either a WoW64 compatibility problem or (more likely) the unit you're using isn't 100% compatible with Trimble's

Re: [time-nuts] Initial release of Lady Heather for Windows (John Miles)

John Miles jmi...@pop.net wrote: This is my version 1.0 release: http://www.ke5fx.com/heather/readme.htm The app is a decent graphical replacement for tboltmon.exe at this point, IMHO. If you currently run tboltmon on your Thunderbolt, give this release a try. Is it known to run on

Re: [time-nuts] Sound cards

John Ackermann wrote: One very interesting possibility is the HPSDR (High Performance Software Defined Radio) boards called Ozy and Janus. I'm not aware of anyone using this system for TF work, but it has some interesting possibilities. I bought mine for tf work, but sadly I have not

Re: [time-nuts] good book on the history of calendars?

Robert Darlington wrote: So you want to exclude all of the interesting parts of calendar history? I personally think most of the fun stuff happened 6-10 thousand years before that period. I'll take what I can get. I'm not uninterested in earlier calendars, but, yes, I am especially

Re: [time-nuts] Leap Quirks

Hal Murray wrote: Two of my Linux systems hung. One was running a 2.6.25 kernel and one 2.6.26. A system running 2.6.23 worked fine. I saw a couple of notes on comp.protocols.time.ntp about Linux systems locking up. One said that it was a kernel bug in ntp.c but I haven't seen any

Re: [time-nuts] prototyping (was Sub Pico Second Phase logger)

Joseph M Gwinn gw...@raytheon.com wrote: Actually, for quantity one, I don't bother with PCBs. I use 1/16 inch thick glass-epoxy Vectorboard with a 0.1 hole pitch, and thread bare wire through the holes. ... If I were building receivers, I suppose I would be forced to use surface-mount

Re: [time-nuts] Fwd: M12+T ASCII interface - I'm confused?

tvb wrote: I hope you end up liking the binary format; I'm not sure how it could be improved. IIRC, there's no length field in the packet; so you have to know the length of all the messages you might possibly rx, even if you are interested in just a few of them. -ch

Re: [time-nuts] Fine delay generator (Tim Shoppa)

Tim Shoppa wrote: mostly they were using custom-wound nonlinear wire-wound pots and motors driving shafts to make the phases :-). Oh, that is so cool! And obvious once you think about it. I love stuff like that. Are there pictures? (It seems like you could do this pretty well with thin

Re: [time-nuts] Do any regulations or laws require time to be within ?x? seconds?

On Mon, Nov 3, 2008 at 12:03 PM, Gretchen Baxter [EMAIL PROTECTED] wrote: There are a lot of regulations that mandate synchronized time. But do any of these regulations or laws require time to be accurate within 'x' seconds? Such as, 'time much be synchronized within 5 seconds of GPS

Re: [time-nuts] Help with Datum/Symmetricom TymServe TS2100

Skip Withrow [EMAIL PROTECTED] wrote: I have recently acquired a Datum TS2100-IRIG NTP time server. Nice unit, and I do have IRIG-B to feed it, however, reading the manual I notice that there is a GPS version as well. Upon taking the top of the unit off I notice that there are the

Re: [time-nuts] Odd HP 117A configuration

Brooke Clarke [EMAIL PROTECTED] wrote: The same company has another program that decodes the Northern California DX beacons (as controls the receiver frequency). Note the beacons transmit in GPS controlled time slots with stepping RF power levels. The whha...at beacons? Is there a web

Re: [time-nuts] Help with HP 8640B generator (Richard (Rick) Karlquist)

Richard (Rick) Karlquist [EMAIL PROTECTED]L: Going back to Agilent's origins at HP, AFAIK, only Hewlett and Packard ever had traditional offices with walls to the ceiling and doors. Their offices are preserved in the condition they were in when H P left the company. Employees can visit

Re: [time-nuts] While we're discussing backups...

Robert Vassar said: There have certainly been some amusing replies. My only point was that if it you are storing stuff on spinning rust, you can't call it a backup if it's still spinning. Power it off and de-cable it. How much further you go after that to protect it depends on your risk

Re: [time-nuts] rsync (was Odetics 325 425: File recovery)

John Ackermann N8UR [EMAIL PROTECTED] wrote: You can pipe rsync over SSH; I don't recall the exact magic to make rsync plus SSH work under Windows, but I think you could use PuTTY or Teraterm to provide the port forwarding. No port forwading is necessary nor recommended. rsync does ssh

[time-nuts] Complete Lucent RFTG setup on eBay

There have been lots of messages about how the Lucent RFTG disciplined oscillator bits work in a system. This, from its appearance, is the entire set up with all necessary cables and proper connections: 1 - Lucent RFTGm-II-Rb 15MHz Frequency Reference with 10MHz output 1 - Lucent

Re: [time-nuts] HP58504A antenna

Bruce wrote: Circuit is exactly that to be expected with a discrete pHEMT or similar device. It looks to me as if the bias flows through the trace on the BR and then through a couple of 001 R's before the bias setting 221 R. Nonsense they are 100 ohm resistors text is upside down.

Re: [time-nuts] Frequency divider design critique request

David Partridge wrote: CPLD - wassat? OK, OK I have some idea, but that's about all I know. Anyway these are probably BGA stuff which I couldn't hope to hand solder anyway Many CPLD's are leaded. Only the high-pin count CPLD/FPGA's are BGA. Chris Hoover, Christopher, per favor. You

Re: [time-nuts] Frequency divider design critique request

John Miles wrote: I am not a big fan of BNC connectors on the PC board itself, because I am not a big fan of attaching PC boards directly to panels in most cases. There are usually some BNC bulkhead connectors on eBay that terminate in SMA/SMB/SMC pigtails, which are great for panel

[time-nuts] Re Frequency divider design critique request

Bruce wrote. However this adds considerable complexity and would be much easier to implement in a CPLD or FPGA. John and I have a design sketch based on a CoolRunner-2 CPLD that we have been kicking around as a potential TAPR board. The CR2 is nice in that the flip flops can be clocked on

Re: [time-nuts] HP 5087A Input Doubler and 10 MHz Ampifiers

NE8S [EMAIL PROTECTED] wrote: I am in need of the following Opt PCB's for the HP 5087A: ... Qty. 115087-60012 (10 MHz Amplfiers) Good luck. I like to a have some more of these as well. I have considered doing a run of 60012 boards. This would be straightforward except for one thing: I

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