Re: [time-nuts] Question for the cesium nuts.

Perhaps the future of timing is the newly developed (and not yet commercialized) Mercury ion frequency standard. Also, some high end rubidium (such as Perkin-Elmer) manufacturers are able to develope 133Rb clocks having 450 000 hours MTBF! That'a a lot of nanoseconds! 73 de Normand VE2UM ---

Re: [time-nuts] Delay through GPS antenna splitter/amplifier -- an answer, and a question

One is much better to take the filter's delay in account rather than NOT USING a filter!!! i can hardly imagine a GPS receiver/antenna without any form of preselection, and, unfortunately, they're many of those filterless units on the market! 73 de Normand VE2UM Montreal, Qc. Canada --- John

Re: [time-nuts] CHU 7.335MHz saved or lost?

Hi... I've just got this message (in french) about CHU Canada @ 7.335 MHz: - - - - - - - - - - - - - - - - - - - - - - - - - - - Bonjour Normand, Merci pour votre support de CHU. Nous avons eu la permission du CRTC de renouveler notre licence sans aucun change à la fréquence ou le mode

Re: [time-nuts] 3325A attenuators

Do you hear the relays working when you change the signal level? If yes, and that's probably the case, i definitely suspect burned-out attenuator resistors/modules (HIGHLY probably due to excessive reverse power (Signal generator directly plugged to a transceiver which has been accidently

Re: [time-nuts] Thunderbolt specs

On the Thunderbolt's spex, Allan deviation is shown between 1 and 1000 seconds Does anyone have the AD for longer time periods? 73 de Normand VE2UM (Who already has his Thunderboltmon software, and now waits for the hardware!!!)

Re: [time-nuts] Thunderbolt Purchase Person's list

Add me to the list for ONE unit (if it is under 250$) 73 de Normand VE2UM Montreal, Qc. Canada [EMAIL PROTECTED] --- Colin Bradley [EMAIL PROTECTED] wrote: Here is the latest Thunderbolt purchase list. It is now near 40 units.

Re: [time-nuts] Rockland 5100 Synthesizer manual?

Wow!! I got one too and i have a problem with it... It's resolution below th hertz doesn't work... I've opened the unit, and it's highly complex... It comprises a 10 bit DAC and and a passive output anti-aliasing filter. But, me too, i miss the manual! 73 de Normand VE2UM Montreal, Qc. Canada

Re: [time-nuts] Odd request

...And i forgot one thing... The Telechron solenoid assembly is symmetric and reversible. That allowed some manufacturers to sell Bar clocks that had their hands run backwards!! 73 de Normnad VE2UM --- Normand Martel [EMAIL PROTECTED] wrote: Hi Tom... Not only Telechron were very popular

Re: [time-nuts] 10811 warmup

It's bizarre.. The oscillator is some kind of Colpitts but with coils instead of capacitors in the feedback path. (i don't call it a Hartley, bcause Hartley's use a SINGLE tapped inductor.) 73 de Normand VE2UM --- Dr Bruce Griffiths [EMAIL PROTECTED] wrote: Hal Murray wrote: Is it okay to

Re: [time-nuts] Z3801A - notes on the hp58533a GPSDO

Nice building (I couldn't resist... When i see coordinates, I HAVE TO go to maps.google.com to see whetre it is!!! Is it officially recognized as being an addiction??) ;-=) Have a good day! 73 de Normand VE2UM Saint-Hubert (near Montreal), Qc. Canada

Re: [time-nuts] Announcing the TAPR FatPPS Pulse Stretcher

I've made a such pulse stretcher to render the 1ms pulse from a CMC Superstar and the 10µS pulse from a Trimble Lassen SK8 visible via an L.E.D. by using a simple 555 timer configured in a monostable fashion. Sure it is not nanosecond precise and i'm not sure AT ALL it will react to a 20ns pulse,

Re: [time-nuts] TrueTime A-60FS antenna Data Needed

/2007, Normand Martel wrote: You could do a simple test: With an ohmmeter, on Diode test and with reversed polarity (Red on shield, black on center pin), measure the DC resistance on the RF connector. If it's a short ( 1 ohm) DO NOT APPLY ANY VOLTAGE ON IT! Your antenna is passive

Re: [time-nuts] TrueTime A-60FS antenna Data Needed

You could do a simple test: With an ohmmeter, on Diode test and with reversed polarity (Red on shield, black on center pin), measure the DC resistance on the RF connector. If it's a short ( 1 ohm) DO NOT APPLY ANY VOLTAGE ON IT! Your antenna is passive and conducting. If the ohmmeter indicates a

Re: [time-nuts] Locking gunn diode

the construction of the prescaler itself, but also it's integration inside the 5328 counter and the rquired modifications of the HP counter. 73 de Normand Martel VE2UM Montreal, Qc. Canada --- Didier Juges [EMAIL PROTECTED] wrote: Hittite has dividers (prescalers) that go to 18 GHz: http

Re: [time-nuts] Locking gunn diode

Some time ago, i've found documentation on microwave prescalers, (from Hewlett-Packard/Agilent) that could count up to 18 GHz. Tonight, i've found those SiGe prescalers from NEC: µPB1510GV .5-3 GHz div. by 4 prescaler: http://www.ncsd.necel.com/microwave/english/pdf/PU10311EJ01V0DS.pdf

Re: [time-nuts] GPS new L2C civil signal -- timing uses?

-tier redudancy with the upcoming og Galileo). For now, i will watch the sky for that guy with a big white beard, a sleigh and eight reindeer... for that brand new L2C time machine!! 73 de Normand Martel VE2UM Montreal, Qc. Canada --- Magnus Danielson [EMAIL PROTECTED] wrote: From: Christopher

Re: [time-nuts] FMT

--- John Ackermann N8UR [EMAIL PROTECTED] wrote: Hi Normand -- Your method is similar to mine, except that I use a much closer beat note (usually less than 100 Hz) and use spectrum analyzer software and a sound card to measure the beat note (in the form of the delta between two

Re: [time-nuts] FMT

condition. The receiver does NOT need to be a precision unit (you could even use a VFO controlled radio), since the beat comes from the heterodyning between the station's and the generator's signals. 73 de Normand Martel VE2UM Montreal, Qc. Canada. --- John Ackermann N8UR [EMAIL PROTECTED] wrote: Hi

Re: [time-nuts] Blackout in Europe and power line frequency jump

/Rb/GPS standard) of the hydro line (a lead/lag of 21600 degrees would correspond to a one second L/L) than the actual frequency. Also because phase is the integral of frequency, it is far easier to monitor errors in phase rather than in frequency on a long term basis. Have a good day! Normand

Re: [time-nuts] Blackout in Europe and power line frequency jump

cruise ship will have to wait until 2:00 AM before passing below this line Normand Martel Sponsored Link Degrees online in as fast as 1 Yr - MBA, Bachelor's, Master's, Associate Click now to apply http

Re: [time-nuts] Frequency processing scheme of HP5065 vapourrubidium standard

Seems very interesing!!! If i'm right, That could lead to rubidium based primary standards... Normand Martel --- Rob Kimberley [EMAIL PROTECTED] wrote: What about the Rubidium Fountain? See first article in the Autumn 2005 report at link below. http://www.npl.co.uk/publications/news

Re: [time-nuts] Frequency processing scheme of HP5065 vapour rubidium standard

primary standards. Hope this explanation will help! 73 de Normand Martel VE2UM Sponsored Link $200,000 mortgage for $660/mo - 30/15 yr fixed, reduce debt, home equity - Click now for info http

Re: [time-nuts] Frequency processing scheme of HP5065 vapourrubidium standard

--- Bill Hawkins [EMAIL PROTECTED] wrote: Normand Martel VE2UM wrote, With Cesium, high end techniologies like fountains or beans can be used Yes, I know it's a typo and I mean no harm to Normand, but it gives new meaning to the term bean counter. (Normally, a bean counter

Re: [time-nuts] Health of GPS constellation questioned -- recently there have been more satellite outages than ever before

the 26 live stellites, only six (01, 08, 10, 24, 27 and 30) run on Cesium standards, all other rely on Rubidium. 73 de Normand Martel VE2UM Montreal, Qc. Canada. --- Christopher Hoover [EMAIL PROTECTED] wrote: [ the story seems overblown to me, but still worth sharing. follow the last link

Re: [time-nuts] Falling Edge Error

If i'm not wrong, virtually ALL GPS modules have their timing standardized on the RISING edge and do NOT guarantee anything about the falling edge. Glenn's measurements confirm that fact... Ideally, to get sure the users will use the rising edge, that signal shall be a sawtooth!!! (or simpler: a

Re: [time-nuts] Ugly Frequency Dividers

This morning, i've just remembered another weird frequency divider i say on a chronorecorder (a device used to adjust mechanical watches) a few years ago... The frequency dividers stages (three or four, i'm not sure) were unijunction transistor based staircase generators using the charge

Re: [time-nuts] Ugly Frequency Dividers

could count up to 300 MHz after all!!! Have a good day gang and keep this forum running!! 73 de Normand Martel VE2UM Montreal, Quebec, Canada --- Randy Warner [EMAIL PROTECTED] wrote: Tom, Attached is my entry in the butt-ugly PPS divider contest. A whole lot of 74HC192's and 74HC74's. I

Re: [time-nuts] Discussion of precise time and frequency measurement

, but it becomes VERY hard to precisely time pulse time differences with high resolution (µs/cm) on an analog scope with a 1PPS signal (the trace becomes extremely faint. You'll have to shut off all surrounding lights to be able to view the trace). Hope that it will help. 73 de Normand Martel VE2UM. Montreal

Re: [time-nuts] Discussion of precise time and frequency measurement

resolution, easy interval reading). 73 de Normand Martel VE2UM Montreal, Qc. Canada --- John Ackermann N8UR [EMAIL PROTECTED] wrote: Hi Faisal -- I use a time interval counter to compare 1pps signals -- the DUT goes to the start input, and the reference (here, GPS) to the stop input. You

Re: [time-nuts] No Leap Second Dec 2006

Thanks! That was news for me! I just hope that Tom won't be sad... ;-) 73 de Normand Martel VE2UM Montreal, Qc. Canada --- karl strauss [EMAIL PROTECTED] wrote: Just saw this posting, sorry if it is old news: INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE

Re: [time-nuts] GPS Timing in Interference Environment

First of all, welcome in our little group of timing enthusiasts Faisal! You'll see that we often find the best jams in small pots!!! My toughts are more on Rob's interference problems rater on your problem, (since i have no idea of CW interference effects on timing CPS receivers)... But my

Re: [time-nuts] Quick Allan deviation measures

Hi... Talking about Allan deniation, is it possible to find somewhere the Allan deviation data for the all-new Synergy Timing M12M? and, for Tom (or anyone else...), Did you have time to get a unit and do some tests (Allan deviation/sawtooth data/glitch behavior)? Thanks and 73 de Normand Martel

Re: [time-nuts] New frequency standard, Mercury better than Cesium?

They should be able the standard uses a single mercury atom!! ;-) --- Jack Hudler [EMAIL PROTECTED] wrote: Now if they can just make that fit inside a soup can and cost less than $300; we'd all have our own Mercury Standard. :) ___

Re: [time-nuts] Administrivia: Message Sizes

I agree!!! I already ordered a PDF file from a user (i don't remember who) on this forum and we exchanged the file directly without passing through the forum. 73 de Normand VE2UM Montreal, Qc. Canada __ Do You Yahoo!? Tired of spam? Yahoo! Mail

Re: [time-nuts] Interesting Patent

increment remains fixed, regardless of the pulse's duration or frequency (up to a certain extent...). I know, it's hard to describe the circuit with words, but if i find the schematic, i'll find a way to send it here. Have a good day! Normand Martel Montreal, Qc. Canada

Re: [time-nuts] HP 5061A on Ebay

good standard will sell for MUCH MORE $) George is right, we shall have BIG questions about the seller's reputation Normand Martel VE2UM Guys, There is a 5061A on Ebay! it is item # 7617020608. STAY AS FAR AWAY FROM THIS UNIT AS POSSIBLE I bought it at a Dovebid auction

Re: [time-nuts] M12+ Temp sensitivity

day! 73 de Normand Martel VE2UM Montreal, Canada ...Too bad! The Habs have lost against Canes! Said, Hey! Whaddya mean CHEAP? The marketing guys call it feature laden and cost effective! Anyway, you're right. The M12+ is extremely sensitive to environmental stimuli. On our receiver/adapter board

Re: [time-nuts] Old DOS Oncore Program for 6-12 channel receivers

Hi... I'm also interested... I have an old 486 that runs on DOS, ant it would be happy to run this program!! 73 de Normand VE2UM __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

Re: [time-nuts] Oncore GPS models

Hi... F.O.Q. (Full of questions!!!) First, is the Oncore UT+ the same unit as the M12+? And if not, are there significant differences between both units? Briefly, would you suggest me to spend more on a M12+ than a UT+ ?? (or let me wait until july for the allnew M12M...) Also, Randy Warner

Re: [time-nuts] How Rubidiums make their frequency

? Is there a reliability issue there (Rb clocks are more reliable / longer MTBF tha Cesium clocks). I don't know... 73 de Normand Martel VE2UM (A PLL based 9192631770 synthesizer i once imagined...) 10 MHz ---(/250)--4PPS-, OCXO

Re: [time-nuts] IC for 1 PPS Output

Even more El cheapo (and also more ailable from your spare parts drawer): A fast hex inverter (74F04/74HCT04 etc...) wired in a 1-5 configuration (one input inverter driving five output inverters) and then having each of the five output inverters driving a separate 240 (or 220) ohm resistor (keep

Re: [time-nuts] ...Your thoughts on the Trimble Resolution T?

Well, thanks for the advice! ...And also one other convincing (at least for me) feature: The M12+ has a choice of either a 1PPS precise signal or a 100PPS precise signal. For my application (GPS disciplined frequency standard), the 100PPS option will surely help settle the frequency for the few

[time-nuts] ...Your toughts on the Trimble Resolution T?

Hi... I seriously think about buying a Trimble Resolution T timing GPS receiver for a GPS disciplined OCXO frequency standard (Brooks Shera W5OJM's project). Have someone worked with this receiver? The claimed maximum 1PPS to UTC error is 15ns, the best figure i saw yet on GPS receivers, and far

Re: [time-nuts] OSA 8600 Oscillators

Yep!!! I'm also interested in one of those oscillators... A quartz that rivals Rb is surely a good shot! So, price and availibility please... 73 de Normand VE2UM Montreal, Canada __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam

[time-nuts] ...Conexant (Rockwell) Jupiter behaving strangely

at 9998.8365 - 9998.8404 PPS, which is far more away than the initial (turn-on) out-of-lock (1.02PPS) condition. Thanks for your attention... Normand Martel VE2UM Montreal, Canada __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam