[time-nuts] GPS III

pect enhanced timing accuracy from the timing receivers we use in our homemade GPSDO's?. -Don  N5CID ___ 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.

[time-nuts] General Radio Model 723D Precision Oscillator (Tuning Fork)

rn it on. >  Then, we can test for accuracy! (sic). > > A real class-act, 'time-nut' oscillator from the last century, > predating crystals.  > > Don > > Don Lewis > Austin, TX > N5CID > > > > ___ time-nuts

Re: [time-nuts] General Radio Model 723D Precision Oscillator (Tuning Fork)

Thank you, Pete.   -Don == On Sat, 2017-12-09 at 05:57 -0800, Pete Lancashire wrote: > Here's a look at a 723-C (1,000 cps) and how its power supply cap was > handled and a good look inside > > https://www.eevblog.com/forum/reviews/vintage-teardown-g

Re: [time-nuts] Resistance components interested.

I would be interested, ...please put me on the list. Thank you Don Lewis N5CID Austin, TX === === On Sat, 2018-05-19 at 13:19 -0400, paul swed wrote: > Apologies to everyone as this part of Doug's offer isn't time nuts. >

Re: [time-nuts] HP nixie counters, free!

, with no homes, I might be interested in just the Nixie readout modules, if you would ship some to me.  I'll pay shipping, of course. Don N5CID === On Fri, 2018-01-05 at 13:10 -0500, David Scott Coburn wrote: > Hi All, > > I have some old HP n

Re: [time-nuts] Different breed of time nuttery

Accuracy depends on the stepper motor driver :-) A really neat conceit! Don Daniel Mendes This is a different breed of time nuttery than usual in this list but i think that at least some of you will enjoy it: http://www.behance.net/gallery/FLUX-1440/2420150 Found it at hack a day

Re: [time-nuts] GPSDO simulation tool

Hi Tom et.al. Isn't the simulator easily convertible to the real thing? That is, data inputs should be convertible somehow to data streams from physical devices? Don cfo On Fri, 21 Mar 2014 14:55:34 -0700, Tom Van Baak wrote: Have a look and let me know what you think. The tool is gpsim1.c

Re: [time-nuts] GPSDO simulation tool

-ethernet being the only external wiring? Hope I'm at least making at least logical sense… Don Tom Van Baak Hi Don, Yes, easy! And that's exactly the idea -- to take real inputs (or borrowed copies of real inputs), and a real software algorithm, and measure the virtual output to see how well your

Re: [time-nuts] GPSDO simulation tool

-ethernet being the only external wiring? Hope I'm at least making at least logical sense… Don Tom Van Baak Hi Don, Yes, easy! And that's exactly the idea -- to take real inputs (or borrowed copies of real inputs), and a real software algorithm, and measure the virtual output to see how well your

Re: [time-nuts] GPSDO simulation tool

-ethernet being the only external wiring? Hope I'm at least making at least logical sense… Don Tom Van Baak Hi Don, Yes, easy! And that's exactly the idea -- to take real inputs (or borrowed copies of real inputs), and a real software algorithm, and measure the virtual output to see how well your

Re: [time-nuts] GPSDO simulation tool

-ethernet being the only external wiring? Hope I'm at least making at least logical sense… Don Tom Van Baak Hi Don, Yes, easy! And that's exactly the idea -- to take real inputs (or borrowed copies of real inputs), and a real software algorithm, and measure the virtual output to see how well your

Re: [time-nuts] GPSDO simulation tool

sorry! had a glitch and hit send too many times :-) -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2

Re: [time-nuts] Acam TDC's

AliExpress has them, 5 piece lot for $70 shipping to US $4.21. One claim I saw said in quad mode 22 ps resolution. H Don paul swed Angus Yes I did a fast check and couldn't find anyone in the US that seemed to carry it. The eval kit looks nice but will speculate its quite costly

Re: [time-nuts] Acam TDC's

will inventory the stuff. Maybe Adafruit or somebody like that will offer it on a breakout board? I'll let you know when I hear. If 22 ps is right, one of these chips and a Raspberry pi or Beaglebone will be great! This country is slowly killing itself with layers of goo. Don paul swed Angus Yes I did

Re: [time-nuts] Acam TDC's

Here is the answer from the US Distributor. I won't be following up, Thanksgiving plate already. If I were buying, I'd get it from the Chinese? 5 for $70 Don Thank you for your inquiry. May I please get your company name, location and contact information? We have several Sales Managers

Re: [time-nuts] Clock quality: alternatives to ADEV

Tou can try some chaos analysis on the phase space (not the phase of the signal). It may be that some kinds of shifts are chaotic. Don Hal Murray I've been watching the discussions and graphs for a while. ADEV seems appropriate for cases where the noise pattern is nice. How does ADEV work

[time-nuts] Fwd: Red Pitaya

An interesting piece of hardware. Reasonable for its capabilities/ Don Begin forwarded message: From: The Red Pitaya Team sa...@redpitaya.com Subject: Red Pitaya pre order notification Date: April 24, 2014 9:10:14 AM MDT To: d...@montana.com d...@montana.com Reply-To: The Red Pitaya Team

Re: [time-nuts] Ublox 7

Sorry to lose you, Bert. Evidently a new exclusive group is just what you need. Don ewkeh...@aol.com Having used lately ublox 6M for GPSDO work I decided to buy a couple of MAX 7C's on ebay for $ 16.00 181293242043 Super results. We are going to do some saw tooth analysis but most

Re: [time-nuts] VNA design

Those interested might look at RedPitaya.com for a new piece of hardware that might be used. Less than $500 without a box Don Dr. David Kirkby On 2 Jun 2014 15:50, Attila Kinali att...@kinali.ch wrote: I recently got introduced into the usefullness of a VNA. But these things are horribly

Re: [time-nuts] VNA design

Also, a convenient signal source with built-in attenuator: http://www.rf-consultant.com/calibrated-signal-generator/ Don Dr. David Kirkby On 2 Jun 2014 15:50, Attila Kinali att...@kinali.ch wrote: I recently got introduced into the usefullness of a VNA. But these things are horribly expensive

Re: [time-nuts] Loran, GPS, Lightning, Timing

there is one in Boston and TOA enterprisesin Florida. U of Washington has a network as well. Enjoy! I can tell you after 50 years of dinking with it, Lightning is fun if ya ain't too close. Don Tom Van Baak The first input you need is the exact longitude/latitude of the lightning bolt. The easiest

Re: [time-nuts] FE5680 GPS Disciplined Controller Update

bang-bang servos do depend on inherent low-pass filtering by the controlled device. Don saidj...@aol.com Tom, airflow, or changes in airflow are typically much worse for ADEV than actual ambient temperature changes in still air. In still air for example a typical Eurocan DOCXO will have

Re: [time-nuts] Loran, GPS, Lightning, Timing

into an AC signal. Getting too far from time nuttery and into atmospheric electric nuttery :-) Don Brian Lloyd On Wed, Jun 25, 2014 at 4:42 PM, paul swed paulsw...@gmail.com wrote: I am currently using a 12AX7 as a ELF preamp and have for years. A note in the coldest part of winter preheat

Re: [time-nuts] GPSDO standard interface?

are available or developed. Wow what a deal... Don Mark Sims There are TSIP commands for doing all those things. It should be fairly easy to adapt them to control your hardware and whatever GPS receiver you are using. The nice thing about implementing a TSIP interface is being able to use

Re: [time-nuts] Loran, GPS, Lightning, Timing

to build the amateur scientist stuff, but there were always the lines with arrows off the figure to power supply. Wonder if that's why I have hell boxes full of old power supplies:-) Probably a darned good thing I didn't build the x-ray tube! Don -- The power of accurate observation is commonly

Re: [time-nuts] Setting Windows XP clock.

I use nmeatime, you can set from the net or from a gps plugged in to the computer. Have used it on all my computers for many moons. http://www.visualgps.net/nmeatime/ Don Max Robinson As some of you no doubt know microshaft has stopped supporting windows XP. As part of this they have ceased

Re: [time-nuts] Setting Windows XP clock.

Whee! Chris: the text box in the xp clock set window is ONE CHARACTER too short to contain the suggested url. It just gets better and better. Don Chris Albertson I did see some retries going to time.windows.com. I'd suggest changing to 0.north-america.pool.ntp.org if you live in North America

Re: [time-nuts] Setting Windows XP clock.

All I can get with any server is an error occurred while synchronizing. . . OTH my symmetricom analog network clock is peacefully humming along and has been for at least a year now. Connected to the same ISP. Don Chris Albertson I did see some retries going to time.windows.com. I'd suggest

Re: [time-nuts] Setting Windows XP clock.

in the registry, unambiguous. Cheers, Don Daniel Mendes This probably ends in the registry somewere... type some random garbage, save, and seach the registry for this string... then edit the registry to put the correct url there. Or use a url shortener service Daniel Em 13/07/2014 17:18, Don

Re: [time-nuts] Setting Windows XP clock.

That appears to work as well. Good on ya Don Brian Lloyd On Sun, Jul 13, 2014 at 3:18 PM, Don Latham d...@montana.com wrote: Whee! Chris: the text box in the xp clock set window is ONE CHARACTER too short to contain the suggested url. It just gets better and better. pool.ntp.org

Re: [time-nuts] Worlds first time code generator and ultimate decoder

So who could afford Brush paper? I had hundreds of feet of adding machine paper (cheap!) If your fingers ain't purple, you ain't doin' science... Don Chuck Harris It only appeared that way if you were using the wrong paper for the chart recorder. Those that had needles that moved in an arc

Re: [time-nuts] fast switching quiet synthesizer

. A good price. Requires a Healthy! USB port. Don Magnus Danielson You should be able to use DDS test-boards and by timing your last write, you should be able to time the frequency jump. The STEL-1173 takes 6 bytes, but writing the last one latches all 6 bytes over to a single 48 bit word. I

Re: [time-nuts] 5370 extender boards

I'll just echo. 5370 boards very pro and a bargain. Nice mindless job to put together, a break from trying to get a dual boot win7/linux mint compuetr going. pfui. Don paul swed I wasn't going to post but Like Bill I received my 5370 and TM500 boards yesterday. That was fast and agree

Re: [time-nuts] Where the 5370's are...

While a student at NMTech in Socorro, NM, longer ago than I care to mention, I was told upon trying to make a purchase on the phone from a firm in New York...we don't accept foreign currency some things don't change much Don On 10/18/2014 9:18 PM, John Seamons wrote: while they try and decide

Re: [time-nuts] Where the 5370's are...

yep. Actually, my wife worked in Socorro on the second-to-last manual telephone exchange in the US. Our phone number was 49J. If I remember right, it was an 8-party line. No secrets! Don On 10/18/2014 10:24 PM, Mark Sims wrote: if New Mexico is really a legitimate US state. I dunno, I've

Re: [time-nuts] LTE-Lite module and the pendulum...

Also have this problem with capacitor-adjusted tuning. No matterhow careful you turn, stiction causes the adjustment to jump in the direction of the turn. Don John Miles Great insight thanks. You nailed it: out with the old oscillator and in with one that doesn't have that problem. Btw

Re: [time-nuts] Mercury Ion Clock

of it; pt and it's done. Safer than your old refrigerator. :-) seriously, tn's, see: http://www.microsemi.com/document-portal/doc_view/133441-rubidium-devices-material-safety-data-sheet Don paul swed Magnus, But for a time-nut how can price even enter into the conversation? Plus it only draws

Re: [time-nuts] Z3812 Diag port data? RE: time-nuts Digest, Vol 124, Issue 26

Does anyone know if Forth is the native tongue of these boards? I have yet to fire my pair up. Don Bob Stewart Hi Bob, I am only able to communicate with my system through the REF-0/slave unit.  I had thought this was normal behavior till someone, you perhaps, posted that that was not correct

Re: [time-nuts] Z3812 Diag port data? RE: time-nuts Digest, Vol 124, Issue 26

Bob and all: Haven't hookedd upmy units yet. Marlon P Jones (MPJA) has some Real Cheap 15 pin m-m cables that are 1 ft long, might be useful. no clipped pins, whatever they're for. I don't think many of us want to hot-plug that cable? Don Bob Camp My boxes were flakey at first. What I finally

Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

/productContent.do?productId=nullentryId=1-02115 there are indications that documents, including the one we seek, are available, behind the golden key. Anybody have an alcatel account? We're close! And thanks to (lost in the big list of emails) whoever came up with the document name! Don

Re: [time-nuts] pn3048 software

Hi Ivan: I agree about the usefulness of noise sources. Also good with my spectrum analyzer for filters, amps, etc. But I haven't sen any cheap ones on ebay at least, HP's and equivalents are around $1000 or so. Am I looking for the right thing? Don Ivan.Cousins Does anyone else have the pn3048

Re: [time-nuts] KS-24361 GPSDO question

cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com

Re: [time-nuts] Quad Driven Mixer 5 to 10 MHz Doubler Atricle

. Don Dave M I am able to download the files associated with the article, but not the article itself. Guess I need to be a paying member to get the article. The only files in the download are the XLS file for calculating the filter values, and the parts list. It's at http://www.arrl.org

Re: [time-nuts] Quad Driven Mixer 5 to 10 MHz Doubler Atricle

I digitized the first 2011 article to hand, the one in Jan-Feb; it's a smaller article, and not as elegant as the later one. Anyone interested can email me off-list. You're allowed to have a copy for your own use, just can't re-publish. Don Jim Sanford I'm a member, and the article

Re: [time-nuts] strange carrier

7.6 Hz is very close to the Schumann resonance fundamental. Don Doug Ronald I'm working on my WWVB BPSK receiver and am receiving a carrier, 10 dB stronger than WWVB in Sunnyvale, California, quite stable, on the air 24/7 at a frequency of 59.99240 kHz. I have researched on Internet what

Re: [time-nuts] Division Circuit

Thanks. You reminded me of the time when design ideas really had content. No more, I'm afraid... Don Azelio Boriani No need to digitize, the article is available here: http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1 or here (in .PDF): ftp

Re: [time-nuts] Yet another GPSDO

big 7 table Don Bob Camp Hi The guy’s email *might* be: bg7...@126.com That also could be something else entirely. Bob On Nov 18, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote: Hi … and indeed it is one. There are a whole range of this and that pieces of test gear designed

[time-nuts] ocxo

? The FTS 4060 is up, pumpin' and firmly locked. At least for now. That dealer was not lyin' Much thanks to all of you. The adventure continues -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems

Re: [time-nuts] ocxo

separately. So a bootup self check shows OK even if the frequency standard is way off. Onward and upward. Don Bob Camp Hi I believe that the SR620 uses a “true” 10 MHz OCXO. I would be careful using a 5 MHz doubled to 10 OCXO. The counter may or may not be happy with sub-harmonic induced jitter

Re: [time-nuts] rs-422 rs-232 to fast ethernet converter

This kind of device is great, works fine, but hold on to your wallet! I'd look on epaY for something like this... If bought new, it'll cost more than the KS... Don Graham I have been contemplating how I will would like to interface to the KS-23461 devices using rs-422. One option is a rs-422

Re: [time-nuts] ocxo

, unfortunately. Don Bob Camp Hi At least the Morion’s I have seen have 5 MHz crystals in them rather than 10 MHz. They have a 10 MHz output due to an internal doubler. Since the circuit is not perfect, there is cycle to cycle variation in the 10 MHz. It’s way more jitter (measured

Re: [time-nuts] ocxo

do anything much new, but it's new to me. All this to drive moonbounce... Don Bob Camp Hi If all the “good stuff” runs on the 90 MHz, the 5 MHz issue may not be important at all. It’s just something to watch for. If you start seeing data in two groups, each one 20 ps wide and separated

Re: [time-nuts] ocxo

No question about that. The morion does run a little warmer than the old unit apparently did. Fan is temp-controlled, so I think OK. will monitor box temp with a digital :-) thermometer, very poor resolution, but probably ok. When I get the last obs done. will do a little blurb to the group. Don

Re: [time-nuts] ocxo

, Don Latham d...@montana.com wrote: No question about that. The morion does run a little warmer than the old unit apparently did. Fan is temp-controlled, so I think OK. will monitor box temp with a digital :-) thermometer, very poor resolution, but probably ok. When I get the last obs done

Re: [time-nuts] ocxo

clock if needed. The dac value is saved so the internal osc is automatically calibrated by this technique. I'm really impressed by this box! A lot of thought went into it. Don Bob Camp Hi About the only other question would be the proper resolution for the DAC. There’s not much of a way

Re: [time-nuts] ocxo

(25ps rms) of the SR620. Thus, if the signal from a Cesium clock is input into a SR620 with a standard TCXO oscillator the short-term and long-term stability of the SR620 will become that of the Cesium clock. Yes, all jitter is relative... Don Bob Camp Hi The ADEV of the reference source

Re: [time-nuts] ocxo

point” of the oxco has no setting voltage? more thought needed! Don On Nov 23, 2014, at 7:34 PM, Bob Camp kb...@n1k.org wrote: Hi The main question is - is there a PLL between the external ref and the OCXO? If so does it go through the DAC? If there’s a PLL through the DAC

Re: [time-nuts] 57600 baud rate with Basic???

Have a look at Robot Basic http://www.robotbasic.org/ he price is right, it's easy to use, and transportable. Don cdel...@juno.com Hi, I'm currently using a GWBasic program at 9600 Baud to get 1 second T.I. data (12 digits) from an SR620 counter, display the reading , put the reading

Re: [time-nuts] 57600 baud rate with Basic etc

Commodore computers in the longago dimdark past serialized the GPIB. They started out with the GPIB as the disk drive and printer interface from the get-go. I used a Commodore as a cheap controller when Hp GPIB controllers cost a small fortune. Don David What aspects of USB would HP have used

[time-nuts] rs232

Ok, if you don't like RS232: http://ics.nxp.com/support/documents/interface/pdf/UFm-I2C-Gaming.pdf Don -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century

Re: [time-nuts] A nice auction in the Seattle area

as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com

Re: [time-nuts] A nice auction in the Seattle area

Actually, I was thinking more of Murphy's law :-) Sorry it got taken the wrong way... DaveH Hi Don I have been going to James G. Murphy auctions for the last 20 years (the Seattle Space Needle remodel was my first) and love them. Zero shilling http://en.wikipedia.org/wiki/Shill

[time-nuts] T-Bolt oven / LH question

, is this normal? Do I need to enable the oven or change a temperature setting? Thanks in advance. Don O'Connor ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

[time-nuts] T-Bolt oven / LH question

Bob and George I now believe my T-bolt is operating correctly. Upon power-up the cooled T-bolt draws about 700mA on the +12 supply until the oscillator warms up. I also misunderstood the temperature sensor and the temperature displays on the LH software Thanks for your assistance. Don

Re: [time-nuts] Timing performance of servers

Look out for TNC connectors and 12v on the Symmetricons! Don Bob Camp Hi If: 1) You are in a reasonable location (good sky view) 2) Don't have a great long cable run ( 50') 3) Are only after NTP time Then, you can get away with a pretty simple antenna. I likely won't last as long

Re: [time-nuts] Hackable hardware for timenuttery

Preorder? ...for the sark was a boojum, you see ... Don Poul-Henning Kamp If one were to rearrange the input circuit a little bit, and give it some new firmware, this looks very close to platform for time measurement... http://www.seeedstudio.com/blog/2012/10/10/preorder-now-pocket-size

Re: [time-nuts] thunderbolt

I'm looking for a Thunderbolt or similar with defunct 10 MHz oscillator for a weird project. Anybody have something at rockbottom price? Don L -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De

Re: [time-nuts] Warning if buying from directly from Agilent via eBay with Paypal.

I'm wondering if agilentused is really part of the Agilent corp or whatever it's called? or an independent company entirely? My only and last $.02! Don L J. Forster Not if you just walk into a bank and open an account with $100 cash. My point is not fraud, but that PayPal is not safe. -John

Re: [time-nuts] Wanted - AN/URQ-10 manual

Forth forever!!! Don L M. Simon Can't help you with the manual but I just wanted to say that the 1051 was one of my favorites. Loved the PLLs. I worked on an upgrade for Stewart Warner back in the early 80s. As part of a prototype I put two Z-80 systems in the space between the front panel

Re: [time-nuts] Nifty MINI TIC for DMTD work

uh, ok, how do we order the boards? Don L cdel...@juno.com MINI-TIC for DMTD work Hi Everyone! I've been testing a Miniature 2 channel TIC that Bert Kehren and Juerg Koegel and Richard Mc Corkle have designed. It has 9 digits/Sec. and with a 1HZ offset in the DMTD unit gives

Re: [time-nuts] FE-5680A no 10MHz RF output?

Look on Didier's site or TvB's and you should find the hack that turns the 5680A into a variable output frequency device; there's a DDS with an rs232 interface. All is not lost? Don L Volker Esper Am 25.11.2012 18:29, schrieb James Peroulas: Message: 3 Date: Sat, 24 Nov 2012 11:10:02 -0600

Re: [time-nuts] EIP545A 18GHz counter query

it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] EIP545A 18GHz counter query

try driving it with an Arduino. Don Ed Palmer Hi Don, Yes, I've heard of SRDs. I think every Rb standard uses them. I recently purchased a YIG Multiplier that includes an SRD followed by a YIG filter. But, from my reading, there are some significant issues that you run into when driving

Re: [time-nuts] Time security musing - attacking the clock itself

Well, if it's the current set of ruffians we're worried about, my guess is a reasonably well-placed RPG would get the job done 1/2 :-). Don L Bob Camp Hi If your GPS is sitting somewhere on the main power grid, it's often already in a pretty massive electromagnet field. Early on they tried

Re: [time-nuts] PTTI 2012, part 2

I agree, Bill. I do have some elk in the front yard, but they are no help... Don L Bill Dailey No MIT here. Sadly. Sent from mobile On Dec 4, 2012, at 8:49 AM, paul swed paulsw...@gmail.com wrote: Basements the key. So for me bigger is better. Heck if its a rack thats ok. It gets

Re: [time-nuts] GPSDO Alternatives

I wonder if two hardware interrupts on the Arduino itself could not be used for phase locking? There's also an ARM 80 MHz version of the Arduino package that might be applied, admittedly at higher cost... Don Jim Lux On 12/5/12 12:06 AM, Bruce Griffiths wrote: Hal Murray wrote: albertson.ch

Re: [time-nuts] GPSDO Alternatives

too new at this to decide. Don -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don

Re: [time-nuts] GPSDO Alternatives

Chris: yes, dividing would have to be done. Doesn't TVB have a simple divider block? You don't really have to close the difference, just maintain it? Don L Chris Albertson You'd have to seriously divide down the output from the 10MHz OCXO if you were going to use it as an interrupt. Maybe

Re: [time-nuts] GPSDO Alternatives

Good thought, Bob. AD9548 $27, eval board a whopping $250, get a thunderbolt :-). The eval board has a lot of SMA's on it... Don L Bob Camp Hi If all you want is a something locked to a GPS: Take the pps from the GPS and hook it to an AD9548. You probably will need a 50 cent CPU to set up

Re: [time-nuts] GPSDO Alternatives

provide rate correction for phase control rather than frequency control? A smaller version would generate the perfect 3 minute egg. o gosh maybe this thread is petering out in my head don L Bob Camp Hi That is an impressive hourglass. In the context of the thought experiment swap offer

Re: [time-nuts] PPS offset between GPS receivers

I use a tee connection and terminated 100 foot (33 m )piece of RG58 coax for a known delay to the stop pulse. Don L Azelio Boriani Yes, this is a good test: to evaluate how your preferred uP can perform as a time interval counter, you can hook two GPDSOs' PPS to it and see the result

Re: [time-nuts] Real YIG data was: YIG oscillator drift question

There are also YIG synthesizers available on epay, see eg 140894282834 Don John Miles Neat data set! This says a lot about the stability of your HP supply. The choice of current-sense element makes a big difference in a YIG driver circuit, and most wirewound resistors fall into the Don't ask

[time-nuts] Synergy SSR-6TR

will work as well with the SSR-T6R, I am told. I really like this program, although it does cost. My Oncore has been flicking its 1 sec led for some 10 yr without a gasp, and the 1 sec to a succession of PC's. Haven't implemented a local NTP server yet. Don L -- Neither the voice of authority nor

Re: [time-nuts] MesoAmerican calendars, Solstice, etc.

the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road

Re: [time-nuts] MesoAmerican calendars, Solstice, etc.

the winter sun rises 180 degrees from the heel stone, don't it? through the trilithon... but yeah. I'd like to be there once for winter solstice sunrise. Been there to visit back when one could walk around... Don Jim Lux On 12/17/12 12:03 PM, Don Latham wrote: And it's on my birthday, too. So

Re: [time-nuts] Just for Fun - Synergy Systems SSR-6T PPS Comparison

Hi David: I got my new SSR-6T today, quite prompt. I can't find a darn thing about pinout or anything else on the Synergy site, nor can I produce anything from Boogle. Where did you find the info? I have a call in to Synergy, but I'm just wondering... Thanks Don David Martin A Day in the Life

Re: [time-nuts] SSR-6t Connector

cost-effective for all sorts of fooling around! Don Tom Van Baak Hi Paul, I'm pretty sure the hp Z3801A and 58503A/B (and perhaps other 1990's era) GPSDO use the Motorola Oncore VP receiver. It was, and still is, a famous GPS timing receiver. Later, many GPSDO evolved to use the Motorola/iLotus

Re: [time-nuts] SSR-6t Connector

board, sorry I deleted the message about that, so can't refer to the appropriate TN message. Don KD0GLS I'm looking at Synergy's Tech Note #493 for the SSR-6Tr and trying to make out the part number of the PIC from the picture. Looks like it might be a PIC24F part. Would appreciate knowing

Re: [time-nuts] 2.5 Ghz 12 digit counter project

Second that! modular prescalers available from RFBay, need only 12v, can get enough from the counter. Don L Bob Camp Hi As far as I can see, you would do *much* better with a surplus HP counter (sub $200 or even sub $100) and some sort of pre-scaler. Bob On Dec 28, 2012, at 2:51 AM, Bruce

Re: [time-nuts] 2.5 Ghz 12 digit counter project

Right again. And even the old counters eg HP have lots of software, it's just that the hardware used is in smaller and slower chunks :-) Don L Bob Camp Hi Most stuff these days is less than 20% hardware and more than 80% software / firmware. These counters are no exception. Based

Re: [time-nuts] Fw: Rubidium Lamp PIX

this would be even better with some arrows showing where to put the heat to heal the lamp! Don cdel...@juno.com Here is a PIX of various Rubidium lamps. From the left top, Tracor EGG LPRO 5065A R20 FRS PRS10 bottom two are FRK I'll see if Tom Van Baak will add them to his

Re: [time-nuts] Fw: Rubidium Lamp PIX

Hey, thanks, Chuck. I think I have a couple of candidates. Soon as I get some time. . . Don Chuck Harris Should be easy enough for you to figure out. The idea is to evaporate any rubidium that is blocking the light from leaving the bulb and making a straight path to the filter cell

Re: [time-nuts] ensemble oscillators for better stability

maybe if it ever gets gebraucht enough . . . :-) happy new year to all Don Gerhard Hoffmann Am 30.12.2012 06:18, schrieb Hal Murray: ,The Tuxedo Park book reported that Loomis had 3 Shortt clocks setup in a basement lab carved out of bedrock. They would get locked unless they were swinging 60

Re: [time-nuts] An embedded NTP server

Yay for Forth! Don M. Simon The design I'm working on brings out the UART pins to a header. I am designing adapter boards for RS-232 (using a MAX232 type equivalent) or USB using the FT232RL chip for the USB interface. There will also be an I2C interface for a display (16X2 to start

Re: [time-nuts] An embedded NTP server

how about a Propeller? 8 cpu's no waiting :-) Don Magnus Danielson On 03/01/13 03:26, Jim Lux wrote: On 1/2/13 5:34 PM, Tom Harris wrote: +1 for Forth! +1 for your opinions on PICs AVRs. We can buy low end NXP ARM Cortex M0 chips (e.g. LPC1113) for less than the PIC18 we were using before

Re: [time-nuts] How far can I push a crystal?

. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com

Re: [time-nuts] One Kg Quartz Resonator

Anybody out there with a pre-WWII GR 100KHz bar standard might find a whole new customer base. I'm absolutely sure that TVB has one :-) Don Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De

Re: [time-nuts] One Kg Quartz Resonator

are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304

[time-nuts] atomic clock articles

A nice pair of articles on the origins and workings of atomic clocks in the January issue of Physics Today. Started off as an atomic interferometer developed by Norman Ramsey. dON -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment

[time-nuts] Hp58540a

century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list

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