[time-nuts] Re: DIY Low offset Phase Noise Analyzer (Erik Kaashoek)

I checked the Hittite/AD part at Mouser, $21 and change. Problem is, they have a few, but it is marked obsolete/discontinued. Also, a devilish package to work with. . . On 2022-07-08 22:19, Mike Monett via time-nuts wrote: To Bob kb8tq. You wrote: Hi The noise floor of the double

[time-nuts] Re: NTP server source needed

I forgot to put the famous number on my response. I've had a cost effective NTP server # 255114568844 running for about 8 months with no problems. On 2022-04-23 14:14, shouldbe q931 wrote: On Thu, Apr 21, 2022 at 9:23 AM Paul Watts wrote: Long time lurker, first time poster. In the past,

[time-nuts] Re: NTP server source needed

I have had one of these running for about 8 months without a burp. Cost effective, and probably available in bulk from the Old Country... On 2022-04-23 14:14, shouldbe q931 wrote: On Thu, Apr 21, 2022 at 9:23 AM Paul Watts wrote: Long time lurker, first time poster. In the past, I've

[time-nuts] Re: +1/f of transistors

A very interesting dissertation. Pdf available. On 2022-04-09 10:29, Lux, Jim wrote: On 4/9/22 6:31 AM, Richard (Rick) Karlquist wrote: I am seeing a lot of unsupported "theories" about what should be done to make devices with low 1/f noise.  It might be instructive for everyone to read

[time-nuts] Re: Potting compound advice needed

I forgot to mention that it can be removed nicely with hot air, and has the very nice property that you can solder things that are coated just in case you should make a misteak. it is soft. I did not know the epsilon or tand. Don On 2021-11-11 17:49, Lux, Jim wrote: On 11/11/21 4:00 PM, djl

[time-nuts] Re: Potting compound advice needed

I've used, wait for it, beeswax as a potting compound. Gouda cheese comes coated with it (some has paraffin, get the best,) in a lovely red. I also found out some years ago that Catholic churches use pure beeswax for large (not votive) candles and may give you the stubs. Nice, clean white.

[time-nuts] Re: pendulum

FUN! On 2021-11-03 06:23, folkert wrote: Maybe a tiny bit on-topic but a nice watch nevertheless: https://www.youtube.com/watch?v=DT5CafrZyDw Syncing a pendulum to an audio synthesizer. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To

[time-nuts] 10 mhz distribution

https://www.sv1afn.com/en/gnss-gps/10-mhz-distribution-amplifier.html has other interesting stuff... The whole world is a straight man. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___

[time-nuts] Re: in-ground clock room

I think you can use precast concrete such as a septic tank or rings. My measurements made a LONG time ago in NM indicate that a mere 18 inches depth leads to less than one degree (God's units as revealed by the French) over the period of a year. Bring wiring in via a trench at the surface

[time-nuts] Re: Query about List and about 10 MHz Distro

Hey: Don't forget that the cable itself is noisy when moved. Especially Teflon insulation. Don On 2021-08-30 06:51, Bob kb8tq wrote: Hi This sort of trouble with BNC’s has been going on a lot longer than they have been coming in from China. A lot of folks use them *way* past the point they

[time-nuts] Re: Stanford Research SR620 GBIB

Perhaps use the rs232 interface with a USB adapter? On 2021-08-28 04:29, Julien Goodwin wrote: On 28/8/21 5:33 pm, Volker Esper wrote: Julien, Can you please tell us wich GPIB-adapter you are using? Thanks Volker Didn't have that info to hand when I wrote the mail, one of these:

[time-nuts] Re: Comparison/evaluation of u-blox timing receivers

John: I missed this on its intro to the group. Great paper and effort. It's also a very useful intro/primer to measurement methodology beyond application to only the u-blox family. Thanks for leveraging the NSF for our benefit! Don On 2021-08-28 05:02, Julien Goodwin wrote: On 24/8/21 11:51

[time-nuts] Fwd: Your request in Real-Time HAT

Here's the quote I received for the hat: Original Message SUBJECT: Your request in Real-Time HAT DATE: 2021-08-19 05:23 FROM: Andreas Foglar TO:

[time-nuts] interesting time hat for RPi

See: https://hackaday.com/blog/?s=Raspberry+Pi+HAT+for+IEEE1588 I got a quote; a 3 port hat is 400 Euro. You'll have to decide. Comments very welcome. Don The whole world is a straight man. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX:

[time-nuts] interesting clock

https://hackaday.io/project/180005-a-digital-real-time-clock The whole world is a straight man. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list --

[time-nuts] Re: Thunderbolts ...

Newer module: $650.00 meh On 2021-07-17 19:45, Gary E. Miller wrote: Yo Dave! On Sat, 17 Jul 2021 00:06:42 +0100 Dave wrote: I'm a bit of a newbie at this, but is it possible to buy thunderbolts WHy? They newer Trimble GNSS timing modules work beter. Like the ICM SMT 360:

[time-nuts] Re: GPS antenna distribution???

4-port: ttps://www.sv1afn.com/en/gnss-gps/-7.html 99euro I have one works fine Don On 2021-06-27 15:06, Georg Sauthoff wrote: Hello, On Sat, Jun 26, 2021 at 11:49:26PM -0400, lstosk...@cox.net wrote: I seem to have an gathering of GPS antenna on my window ledge. I seem to have missed info

[time-nuts] A tale of two NTP servers

A while back, I decided to try putting together a small, gps local NTP server. I have several computers on a lan and wanted to serve them all with a locally controlled device. A bit of research (raspberry pi gps ntp server --in my searcher) came up with several instructive sites.Seemed easy.

[time-nuts] Re: Fwd: FE-5680A Calibrator program by Bob Campbell VK4XV

share? On 2021-03-26 12:18, DM wrote: The search is complete!! A friend sent me what appears to be the full package, the .exe and source code (although the source code is all Greek to me). I'll be playing with that in a few day & see if it will do what I need. My FE-5680A has aged a bit over

Re: [time-nuts] World's most precise.... wall clock

Hi John: What's the cost of the CSAC GPSDO? I'd ask directly, but the exact device specification seems a bit murky. Thanks On 2021-03-03 10:34, John Sloan wrote: I’ve built several small home-brew NTP servers using a Raspberry Pi, a GPS receiver, and an LCD display. Most of them are desk

[time-nuts] useful stuff

https://www.sv1afn.com/en/ has some useful stuff for GPS and 10 MHz. Don -- The whole world is a straight man. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list

[time-nuts] ntp server

Has anyone tried one of these ebay offerings? opinions? 15ns/1pps 0.5-2ms Network NTP Time Server for GPS Beidou GLONASS Galileo QZSS 124133795048 Don -- The whole world is a straight man. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX:

Re: [time-nuts] Long Wave Radio-Frequency standard testing

Sorry, forgot to include the cite: LATHAM, D. Diurnal Frequency Variation and Refraction Index. Nature Physical Science 234, 157–158 (1971). https://doi.org/10.1038/physci234157a0 Don On 2021-01-15 15:13, Andy Talbot wrote: I did a plot of the phase of the UK 198kHz longwave transmission to

Re: [time-nuts] Long Wave Radio-Frequency standard testing

Longwave phase is dependent on the weather between your receiver and the transmitter... On 2021-01-15 15:13, Andy Talbot wrote: I did a plot of the phase of the UK 198kHz longwave transmission to me, a path of about 150km, compared against an HP5061A Caesium standard N early 24 hours

Re: [time-nuts] HP5065a cfield issue

Paul: You can have some fun with this: A vertical line current flow in the neighborhood of 30,000 amperes, pulse risetime on the order of 2-5 microsec, fall time about 40. Kind of a giant magnetic play toy. Don Latham On 2020-12-03 11:23, paul swed wrote: Well Bob what an unusual comment

Re: [time-nuts] 5370B / TimeLab question

or: https://ntrs.nasa.gov/citations/19870019361 from Charlie Greenhall On 2020-12-01 15:52, Tom Van Baak wrote: Hi Skip, You are exactly right. And, surprisingly, this is correct and normal for most TI counters. The short answer is -- for your use case, a *zero deadtime* time interval counter

Re: [time-nuts] Is there a good web page introducing ADEV?

attaboy for Attila. Reality always strikes. On 2020-10-12 03:07, Attila Kinali wrote: On Thu, 24 Sep 2020 13:11:26 -0700 "Richard (Rick) Karlquist" wrote: 1. The statistics of clocks are (take your pick) a. Not gaussian, central limit theorem doesn't apply b. Not stochastic c. Not

Re: [time-nuts] distribution amps for 200 MHz

Cheap Chinese rf amps ebay, also TV splitters On 2020-09-15 12:17, jimlux wrote: For work, I'm looking to distribute 200 MHz to 44 widgets.. The usual SRS, etc. boxes max out at 100 MHz. Any ideas (The going in position is "buy a bunch of minicircuits amps and dividers and assemble it") Tnx

Re: [time-nuts] Chelsea Chronoquartz dividers

Isn't the 4 MHz crystal near the sweet spot for one of the cuts? A dim memory at best :-) DJ On 2020-09-11 11:57, Tom Van Baak wrote: Bill, 4194304 Hz = 2^22 Hz so 22 flip-flops gets you down to 1 Hz. The binary divider is s similar to how the Seiko Beta 21 was designed. See [1] for an

Re: [time-nuts] Chelsea Chronoquartz dividers

HINT: 2^22 = 4194304 On 2020-09-11 11:30, Bill S wrote: A friend has acquired a Chelsea Clock Company Chronoquartz which was probably made in the 70's. He has measured the oscillator frequency at approximately 4.194304 MHz. He wanted to know what arrangement of dividers they used to run the 4

Re: [time-nuts] Time Interval Counter(?) for high-precision watch measurement

Sort of eavesdropping... you might try a piezoelectric pickup, available cheap on epay for guitars, etc. Looking at the actual motion kick of the hand(s)? Don On 2020-09-08 11:59, Raven L wrote: Hi Bob, thanks very much for all the info! You're right that my input signal is pretty crummy -

Re: [time-nuts] 3D printed tourbillon clock

Ummm-- I watched the video. Start to finish. I noticed in many places hand movements reminiscent of those I practiced many times in front of a mirror. There is nothing up my sleeve... Wonder how long plastic springs hold up? Don On 2020-07-25 12:42, Tom Van Baak wrote: I’m guessing a couple

Re: [time-nuts] For those following ES100 WWVB receiver modules

Is there a gnu radio receiver? Should be able to handle this speed. Don On 2020-07-22 11:41, Tim Shoppa wrote: The ES100 module sold by universal-solder.ca which Tom introduced us to a couple years ago, is now End-Of-Life. "A new module is currently in development".

[time-nuts] oddball frequencies

another cost-effective solution: https://www.sv1afn.com/en/products/adf4351-pll-synthesizer-module.html Don -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list -- time-nuts@lists.febo.com To

[time-nuts] One of the best demos/explanations I've ever seen re sampling.

HEY!!! I know many of us "know" this, but I found the refresher refreshing! A really good explanation of sampling. Especially why simple decimation doesn't work. https://zigunov.com/2020/04/25/the-anti-gravity-spout-a-demonstration-of-aliasing/ Don -- Dr. Don Latham AJ7LL PO Box 404,

Re: [time-nuts] Arrows of Time: A project by Quanta Magazine

And Dicke was done out of a Nobel because his antenna was too small. He's the one who told P what they were measuring. That is, after the pigeon poop had been cleaned out of the horn... D On 2020-05-12 16:22, Tom Van Baak wrote: The following article just came out. It's not deep, but it's a

[time-nuts] splitter

https://www.sv1afn.com/en/gnss-gps/-7.html a medium price 4-way Don -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Fwd: [New post] Sun-Seeking Sundial Self-Calibrates in No Time

for fun Original Message SUBJECT: [New post] Sun-Seeking Sundial Self-Calibrates in No Time DATE: 2020-05-06 14:01 FROM: Hackaday TO:

Re: [time-nuts] LightSquared is back now called Ligado

And the competition has/is putting up a gazillion cubesats to screw up another of my little pleasures, astronomy. Bah. It's enough to make you want to go out and stand right next to somebody. Don On 2020-04-17 14:37, Scott McGrath wrote: That was +9.8 on the terrrestrial microcell

Re: [time-nuts] LightSquared is back now called Ligado

It's all about imaginary brick wall bandpass filters. On 2020-04-17 11:37, Scott McGrath wrote: Supposedly lowering Tx power on terrestrial network from +23 DBm to +9.8 DBm will make everything better. Ajit Pai is listening only to carriers and ignoring DoD who is stating it will

Re: [time-nuts] Ultra Stable Rb

Very nice experiment. What do you think might be affected by pressure? At least in the physics pkg? Don On 2020-04-09 09:36, Skip Withrow wrote: Hello Time-Nuts, This is a subject that I have been interested in for quite some time. If you do some searching on Rb oscillator aging, there is a

Re: [time-nuts] Ultra Stable Rb

period it was far less clear just *why* one does up an FRK like part …. Bob On Apr 8, 2020, at 2:32 PM, djl wrote: What a tease! OK, very well WHY??? Don On 2020-04-08 08:04, Bob kb8tq wrote: Hi A few of the long running FRK’s ( in a very similar package … hmmm ….. wonder why …. yes, I

Re: [time-nuts] Ultra Stable Rb

What a tease! OK, very well WHY??? Don On 2020-04-08 08:04, Bob kb8tq wrote: Hi A few of the long running FRK’s ( in a very similar package … hmmm ….. wonder why …. yes, I was there way back then and know very well why :) ) have crazy good long term aging. That said, I don’t think that

[time-nuts] Symmetricom analog network clocks.

Some years ago, symmetricom sold out some analog network clocks. Last winter, both of mine froze up and would not adjust. Being naturally curious, I opened one up, and found the motor and wheels that drive the hands. Knowing that this type of motor has problems, I simply unplugged it and

[time-nuts] of possible interest

https://www.sv1afn.com/en/products/vhf-uhf-triplexer-1.html 10 mhz and uhf/vhf on same cable. -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] Trueposition behavior

Is this effectively dither on the control voltage? On 2020-03-10 10:30, Skip Withrow wrote: Hello Time-Nuts, A couple of weeks ago I posted regarding some weird behavior of the Trueposition GPSDO that I was seeing. I have now been able to get back to the problem and have further results to

Re: [time-nuts] Help with BG7TBL 2015-07-08 GPSDO

Are they both "real" RS-232, both 5v ttl rs232, or hopelessly mixed? On 2020-02-01 15:18, Gary Woods wrote: On Sat, 1 Feb 2020 12:24:24 -0600, you wrote: Hmmm. I do not have any of that equipment, but I do know the RS232 interface pretty well. It may be that you need to cross over the

Re: [time-nuts] Wall Clock that takes 1PPS input

I recall using a clock like that. I drove the coil with a 5v cmos type D flipflop. The coil is hooked to q and ~q with a couple of resistors. That way you get the reversal of voltage with little fuss. Don On 2020-01-02 16:32, Jerry Hancock wrote: I’ll have to go read about the Lord Vetinari

Re: [time-nuts] 1 pps Accuracy in two locations

Maybe Grace Hopper's aid will help? 11.8 inches = one nanosec, so a ps is .0118 inches. You really want two clocks not occupying the same space to be correlated to that accuracy? Don On 2019-12-04 08:55, Tom Van Baak wrote: Martyn, I'm always being asked to provide equipment that can

Re: [time-nuts] FA-2 questions

I agree completely. A friend and I each had one of these and thought there was something wrong with each of them. The dither at 10 MHZ compared to a gpsdo is approximately 10 Hz. We spent many hours with the manual trying to find the cause of the fm to no avail. It's just a bad design.

Re: [time-nuts] FA-2 Operator manual

Didier has allowed .doc and .docx documents. I've uploaded Perrier's .docx so the set is complete. Don On 2019-10-12 16:33, Perry Sandeen via time-nuts wrote: Yo Bubba Dudes!, For those who may be interested, I D/L djl's FA-2 manual and revised both pictures and text. Don said he would post it

Re: [time-nuts] Question for my new GPSDO Heater

Hello: proportional controllers from the Old Country are also available for around $15 on ebay. The one i have uses type K thermocouple. Don On 2019-10-12 18:13, Perry Sandeen via time-nuts wrote: Yo Bubba Dudes!, The suggestion was made to use a ebay item number 192112054053 heater for this

Re: [time-nuts] Question for my new GPSDO

Tobias: along the path suggested by TVb, might I suggest something like a small heater/cooler for your car? lots at https://www.amazon.com/s?k=car+cooler+6+pak=nb_sb_noss a simple controller such as eBay item number: 192112054053 can be applied as well. and Bob's your uncle. Don On

[time-nuts] SR620 ocxo oscillator

Looking for replacement for the ocxo oscillator in my SR620; old one drifted out of adjustment. SR suggested one of their SC10 oscillators which, at $500 a copy, ain't gonna happen. I put a Morion in place, and it works, but has to be outboard because it runs too hot. So, a new cheapy from

Re: [time-nuts] DC distribution

Long ago and far away, I did read that a large(60% or so) of failures in ww2 style equipment was due to wire breakage right at the terminal, that is solder wicking into stranded wire. The very careful wire wrap through holes or around terminals did nothing. Power pole connectors do not have

[time-nuts] FA-2 manual

Just did a rough edit of the FA-2 manual; downloaded to KO4BB. Just edited out the Chinese. The usb commands section is pretty rough, needs to be wrung out, no time just now. Old MS Word compatibility format. The block diagram did not appear. I think, for the price, this is, as the Brits have

[time-nuts] SR620 counter

My sr620 counter has gone nuts. Completely blank readouts, both led's and numerals. I have the manual. and all voltages post-regulator check out. I just wondered if there are known weak spots or idiosyncrasies? There is a clock dropout control that seems to be holding off the front panel.

Re: [time-nuts] Even Seconds Pulse option (1PP2S), HP 58503B

To replace one? On 2019-09-29 10:22, paul swed wrote: On second thought (Pun intended) Its a pendulum clock output. Have no idea why some one would use a GPSDO to drive a pendulum clock but that could be a reason for such a thing. Paul On Sun, Sep 29, 2019 at 12:02 PM Dana Whitlow wrote:

[time-nuts] chrony vs other NTP

Any quick opinions re use of chrony vs other NTP implementations? THANKS Don -- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304 ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] FA2 counter

Got mine today as well, Bert. Haven't gotten a chance to use it yet, good to know you had positive results. Don On 2019-09-26 11:05, ew via time-nuts wrote: Did receive FA2 counter today. Everything as promised, like the 10 second mode best.Use a Datum 2000 as source 10 MHz in the back 5 MHz

[time-nuts] Fwd: [New post] 100 Year Old Atomic Clock

fyi, Don Original Message SUBJECT: [New post] 100 Year Old Atomic Clock DATE: 2019-09-25 11:03 FROM: Hackaday TO: d...@montana.com Gregory

Re: [time-nuts] 5 Mhz to 10 Mhz and 25 Mhz

I looked for breakouts/eval boards for these. Only one I found was $250.00 nuts. maybe an 8=pin SOIC adapter board will do the job? found on dear ol' Amazon for cheap. Don On 2019-09-09 15:24, Paul Bicknell wrote: Hi all thank you I have now printed out the dater sheets for The ICS570B

Re: [time-nuts] FA-2 Precision Frequency Counter BG7TBL 20190622

Looked around at specs. I don't know that I can believe .01 HZ at 6 GHz??? Is that approx 10^-11?? even with gpsdo reference and 10 sec gate. But even so, there are possibilities for this device. I, too, will have to downsize my boatanchors someday soon. Don On 2019-09-04 14:25, paul swed

Re: [time-nuts] TAPR TIC Upgrade?

Would require a real time operating system on the Pi? On 2019-08-14 16:16, Bob kb8tq wrote: Hi Could you? Sure you could. Should you? How much do you feel like rewriting all the driver software from scratch? Do you really want to rewire things to fit to the Raspberry pinout? That’s either a

Re: [time-nuts] HP 10811 stabilizing time

Just visited site. 3million hits on 10811 manuals. We're that many made:-)? On 2019-07-23 05:01, Charles Steinmetz wrote: Rick wrote: Basically, no counter that we ever made AFAIK had any provision for EFC. The later HP5328 "oscillator helper" boards have EFC pots for fine tuning the

[time-nuts] odd frequencies

I've seen questions here about GPSDO disciplined frequency sources for = odd frequencies. I recommend the RFZero: http://www.rfzero.net. For $60 US or so, this unit will provide same. Is programmed using the Arduino IDE, several examples provided. All that's needed is a UBLOX compatible patch

Re: [time-nuts] Distribution amplifier for 10MHz and 1 pps

Gosh. this topic comes up at least once every 6 months. A diligent search of the time-nuts database would turn up amazing things. . . On 2019-03-17 13:24, Hal Murray wrote: For 1PPs the main goal is jitter and the selection of the ICs is very tricky Could you please say more? Do you mean

Re: [time-nuts] GN-GGB0710 GNSS Antenna

Probably tapped for 1/2" pipe thread. Don On 2019-02-24 12:40, Ben Hall wrote: Good evening all, After almost a month in transit, my GN-GGB0710 GNSS antenna arrived from the auction site "we all know and love." ;) Unit was not tapped to a proper 5/8"-11 TPI thread. A standard 5/8-11 bolt

Re: [time-nuts] HP Stories: Cesium Standards on Subs and Sperry

Love milspec stories! Always reminds me of some of my favorite quotes: “Mechanical rules are never a substitute for clarity of thought.” -- Brian Kernighan ". . . rules are a substitute for thought . . ." -- Robert Gunning "A foolish consistency is the hobgoblin of little minds . . ." --

Re: [time-nuts] PPS clock module

Aha! cosidering opportunity cost, not overkill at all! On 2019-01-28 07:38, John Ackermann N8UR wrote: On 1/27/19 5:18 PM, Tim Shoppa wrote: Today - get an Arduino Nano clone ($3) and a 6-digit-7-segment module or dot matrix module ($10). Hi Tim -- Yup, that's probably the answer in the

Re: [time-nuts] PPS clock module

John: a little fiddling, but: epay #172166404085 Don On 2019-01-27 15:54, Bill Beam wrote: I went thru this several years ago and ended up home brew with the following circuit: For adjustment of time indication I added switches to

[time-nuts] rf generator/attenuator

See: sv1...@40gmail.com modules to do what you wanted. With a nice oled and arduino, ADF4351=20 35-4400 MHz PLL external or internal 10 MHz reference and a controllable attenuator. Greek modules, not Chinese. Total cost seems to be about $80 or so. I also found modules like these on EBAY for

Re: [time-nuts] Modern signal generators

Rick: I've spent some time with the dds blocks. We found them to generate lots of low level spurs, making lots of "birdies" when used as local oscillators in receivers. We had better results using: https://www.silabs.com/products/timing/oscillators. These may be used with GPSDO clocks for

Re: [time-nuts] WWV/H Doppler Shift

Tom: Thanks! Rob: your toolchain (to borrow a phrase) produces great results. If I read the graphics right, you might be able to obtain some outstanding results from the HAARP Research Campaign 29 Nov - 03 Dec 2018. U of Alaska Fairbanks Geophysical research Institute. A thought from

Re: [time-nuts] NIST

Is there a translation of this anywhere? Don Sweden were much more serious about it: http://www.antus.org/RT02.html Tl;drs: They erected 9 200m tall Loran-C class antennas each driven by a Loran-C transmitter with an advanced degree which could jam Loran-C or Chayka. They even

Re: [time-nuts] Loss of NIST transmitters at Colorado and Hawaii

Well, maybe NIST wants to cut, and maybe not. What happens is, in zero based budgeting, the chain of command will pass down the line requests for budgets for the coming year with cuts of varying depth. After a couple of cuts everywhere, travel for example, an agency will seek programs that

Re: [time-nuts] Bicentennial GOES satellite clock

all you need for a once a day noon fix is a level surface, a stick, and some pebbles. Don On 2018-08-12 08:29, Scott McGrath wrote: And with dependence on GPS we have created a serious vulnerability as too many critical pieces of infrastructure are dependent on a SINGLE precision timing and

Re: [time-nuts] NIST

Just a word: When budget cuts are announced, the agencies put the most valued "stuff" to be cut first, such as the Washington monument, etc. This is a recognized ploy. When the dust settles, all may be well. . . Don On 2018-08-12 12:20, paul swed wrote: Like all of you I have a few wwvb

Re: [time-nuts] WTS: Efratom PTB-100 Precision Timebase

Greg et.al. IEEE stuff is just too expensive for single purchase. I have found, to my sorrow over 40 odd years, that they also do not contain information, that is, info of actual use, because some other company or person might actually benefit. In other words, the papers are markers in the

Re: [time-nuts] GPS Antenna Grounding/Lightning protection.

First, I recommend the following: http://www.arrl.org/shop/Grounding-and-Bonding-for-the-Radio-Amateur/ well worth the price. second, bleeding off does not prevent discharge. Many such systems are garbage or worse. "bleeding off" is corona discharge from sharp points submitted to a large