Re: [time-nuts] Rubidium oscillator controlled clock
df...@ulrich-bangert.de said: > While the ADCMP600 are available well in Germany (for example from FARNELL) > the MSOP enclosure is very tricky to solder and for a bit less in frequency > performance a LT1016 will do it for you too. The ADCMP602 is the version that comes in the MSOP package. The ADCMP600 comes in SC-70 (0.65 mm spacing) or SOT-23-5 (0.95 mm spacing). -- These are my opinions, not necessarily my employer's. I hate spam. ___ 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] Some 74AC175PC chips Sourced
I'm crossing my fingers that my order doesn't get "revised" by an unscrupulous or overly-optimistic vendor, but assuming it gets filled, as of 20:56PDT I have requests for all of the 50 chips I'm hoping to be able to provide. If you requested "one or two," I put you down for two. Hopefully Stanley will have good luck sorting out his order too, and everyone will end up getting what they need. I'll send separate emails to each of you who indicated interest. Since everyone has a Stateside address, I don't think the postage will vary much, even for a trip across the continent. Might be a bit more for several chips in the bag. Bob WA7ZRX ___ 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] Lady Heather Program Screen Question
Never mind guys, looked more carefully in the help file and found the command to toggle that graph. Guess its "grayed" out initially since its so busy. Thanks Hank ___ 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] RE : Lady Heather Program Screen Question
Never mind guys, looked more carefully in the help file and found the command to toggle that graph. Guess its "grayed" out initially since its so busy. Thanks Hank ___ 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] Lady Heather Program Screen Question
First I would like to compliment the authors on this great program. I just installed the program and using it on my Thunderbolt based GPSDO. I Understand the display , however I cant seem to find the REF OSC ( first graph parameter on the left ) which according to the legend is GRAY in color. I'm using the default parameters for the REF OSC . I can find all of the other parameters on the graph , including both PPS and OA DEV but no GRAY REF OSC graph line. The graph fills the entire screen, so the video screen parameters are set correctly This is an important parameter to watch, any help would be appreciated !! Thanks Hank ___ 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] Some 74AC175PC chips Sourced
God willing and the creek don't rise, I should receive 50 of them within a few days, so if you're a Stateside Timenut, this might be helpful to you. If interested, please contact me off list with your zip code, and I'll provide a cost estimate. Final confirmation after I've actually got them in hand, though. They're not too difficult to locate, but the minimums are bit daunting. Kind regards, Bob WA7ZRX ___ 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] Small quantity of 74AC175PC DIL package available.
Hi All As of 22:50 BST, 26 of the 32 available 74AC175PCs have been spoken for, assuming all who've expressed an interest go ahead. I'll update again later. regards Nigel GM8PZR ___ 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] 74AC175PC availability
A order with BIGeSTOCK.com did not work out last week, I think some of these people don't stock but re-list others stock. In this case they came back with a price 5 times what they said when I ordered. Stanley - Original Message From: Stanley Reynolds To: Discussion of precise time and frequency measurement Sent: Mon, July 12, 2010 2:54:39 PM Subject: Re: [time-nuts] 74AC175PC availability I found them yesterday, and they show my order shipped today, let you know when I receive it. Stanley - Original Message From: Peter Vince To: Discussion of precise time and frequency measurement Sent: Mon, July 12, 2010 2:30:14 PM Subject: [time-nuts] 74AC175PC availability Previous commentators have reported a shortage of this part, but a quick Google brought up Quest Components in Industry, California, who supposedly have over 2000 in stock (http://tinyurl.com/2wxk6lh). I've not tried ordering from them as I'm on the other side of the Atlantic, perhaps a member living a bit closer could try and report any success. Peter ___ 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 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 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] Any clock disturbances during the July 11 solar eclipse?
Hi all, did anybody out there observe any disturbances in his clocks during (and/or before or after) the July 11 solar eclipse? (due to other duties I've been prevented from doing any tests) Thanks, Antonio I8IOV ___ 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] 74AC175PC availability
I found them yesterday, and they show my order shipped today, let you know when I receive it. Stanley - Original Message From: Peter Vince To: Discussion of precise time and frequency measurement Sent: Mon, July 12, 2010 2:30:14 PM Subject: [time-nuts] 74AC175PC availability Previous commentators have reported a shortage of this part, but a quick Google brought up Quest Components in Industry, California, who supposedly have over 2000 in stock (http://tinyurl.com/2wxk6lh). I've not tried ordering from them as I'm on the other side of the Atlantic, perhaps a member living a bit closer could try and report any success. Peter ___ 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 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] 74AC175PC availability
Previous commentators have reported a shortage of this part, but a quick Google brought up Quest Components in Industry, California, who supposedly have over 2000 in stock (http://tinyurl.com/2wxk6lh). I've not tried ordering from them as I'm on the other side of the Atlantic, perhaps a member living a bit closer could try and report any success. Peter ___ 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] Rubidium oscillator controlled clock
Hello Magnus, hello Ulrich - thank you very much for your replies and your suggestions! I will dig deeper into that issue (I begin to get fascinated about precise timing - what a change for someone who once built amplifiers for measuring signals with periods down to 1/100 Hz :-) ). It will take some time (some weeks, since I am preparing for a conference etc.) until I will find time again to improve my oscillator, but I will let you know when I have decided on a circuit design and ask you for advice before actually building it. All the best - have a great day - Bernd. :-) >Message: 3 >Date: Mon, 12 Jul 2010 14:18:35 +0200 >From: Magnus Danielson >Subject: Re: [time-nuts] Rubidium oscillator controlled clock >To: time-nuts@febo.com >Message-ID: <4c3b081b.3090...@rubidium.dyndns.org> >Content-Type: text/plain; charset=ISO-8859-1; format=flowed > >Bernd, > >On 07/12/2010 02:05 PM, ulm...@vaxman.de wrote: >> Hello Ulrich - >> thank you very much for kind reply - this is a great suggestion. Would you >> recommend simple 74xx74 flipflops driven by the original 10 MHz signal >> delivered by the rubidium oscillator for resynching? > >That should do the trick. Even if I doubt the gain would be significant, >you can use both the DFFs in there in series. It is the common way to >reduce the effect of unsynchronized signal into DFFs as there may be >meta-stability, so using two DFFs in series helps reducing the added >noise if the first DFF goes meta-stable. The '74 should be protected to >some degree if I recall things correctly, but it's there and free... so >why not? > >Cheers, >Magnus > >-- > >Message: 4 >Date: Mon, 12 Jul 2010 14:47:29 +0200 >From: "Ulrich Bangert" >Subject: Re: [time-nuts] Rubidium oscillator controlled clock >To: "'Discussion of precise time and frequency measurement'" > >Message-ID: <87aa1e4d813c493a9f325307ac987...@athlon> >Content-Type: text/plain; charset="us-ascii" > >Bernd, > >> Would you recommend simple 74xx74 flipflops >> driven by the original 10 MHz signal delivered by the >> rubidium oscillator for resynching? > >In principle, yes. However not directly clocked by the rubidium itself but >from a clean ttl signal that has been made out of the LPRO's sine. There has >been a long discussion here about the "howto" of this. As a good starting >point I suggest this: > >http://www.ko4bb.com/~bruce/CLKSHPR.html > >While the ADCMP600 are available well in Germany (for example from FARNELL) >the MSOP enclosure is very tricky to solder and for a bit less in frequency >performance a LT1016 will do it for you too. > >Best regards >Ulrich Bangert > ___ 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] Picosecond resolution techniques
On 07/12/2010 05:43 PM, paul swed wrote: Looks like a good read. It is a good read to get overview. When I saw it first most of it I had gather through other exercises. but it should not prohibit others from learn from it. The digital interpolator in Figure 7 using delays is slightly incorrect thought, it is not one set of delays... it has delays both in clock and signal legs. It lives on the delay difference between the paths. The implementation of HP5371A/5372A also includes delay-trimmers. It is essentially a time-difference flash-converter. Anyway, do read that paper! Cheers, Magnus ___ 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] Small quantity of 74AC175PC DIL package available.
Following recent discussions on the availability of the 74AC175PC I made some enquiries today and have located and purchased the total small stock of NOS devices from a surplus IC dealer in the UK. I'm expecting these to arrive sometime before the end of this week when I will confirm that they are indeed all as expected. Rather than just buy the few I need for my own PICTIC boards I decided to buy what they had and make the rest available to other list members. After taking what I need there will be 32 left. I'm not looking to make any profit on this but obviously don't want to lose out on the exercise either. To cover my costs, price of ICs, delivery, and tax, I will need to charge £3.25 for each IC regardless of quantity. UK postage is likely to add at least another £1 to this, large letter delivery because of the thickness plus jiffy bag or whatever but that should be per shipment not per IC.. I don't know yet what delivery cost outside the UK will be but will only charge at cost anyway. >From the UK I can accept cheques or postal orders, even cash in an envelope although strictly at sender's risk, but would prefer Paypal. For payments from outside the UK I can only accept Paypal. I will add an amount to cover Paypal costs, probaly around 50p, which again should be per payment for small quantities. Anyone who's interested please email me, OFF LIST ONLY PLEASE, with quantity required plus address details, or at least a postal or zip code so I can check location for delivery cost. As there is only a small quantity, and to be fair to everyone, I won't guarantee to supply the amount requested as I may need to limit numbers per individual depending on interest, but will otherwise operate on a first come first served basis. I will acknowledge all replies, so if you haven't heard from me after 24 hours please email again. And again, OFF LIST ONLY PLEASE, to avoid confusion I will update on general progress via the list and will confirm individually how many ICs are available per order. Until that's done and agreed I won't be asking for any payment. regards Nigel GM8PZR ___ 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] Picosecond resolution techniques
Dr Kalisz; Greetings, since the timenuts have found you, it is only fair that you should find them. There are (the true Nuts) on this reflector with better standards in their basements than some of the major Time and Frequency national labs. Welcome aboard if you choose to take a look. 73 Les Lester B Veenstra MØYCM K1YCM les...@veenstras.com m0...@veenstras.com k1...@veenstras.com US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Telephones: Office: +44-(0)1423-846-385 Home: +44-(0)1943-880-963 Guam Cell: +1-671-788-5654 UK Cell: +44-(0)7716-298-224 US Cell: +1-240-425-7335 Jamaica: +1-876-352-7504 This e-mail and any documents attached hereto contain confidential or privileged information. The information is intended to be for use only by the individual or entity to whom they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this e-mail or any documents attached hereto is prohibited. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Monday, July 12, 2010 4:44 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Picosecond resolution techniques Looks like a good read. Thanks On Mon, Jul 12, 2010 at 2:39 AM, Ulrich Bangert wrote: > Gentlemen, > > here is a paper that I found by luck which gives a good overview about > picosecond resolution measurements: > > http://ztc.wel.wat.edu.pl/kalisz/met4_1_004.pdf > > Best regards > > Ulrich Bangert > www.ulrich-bangert.de > Ortholzer Weg 1 > 27243 Gross Ippener > > > ___ > 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 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 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] Picosecond resolution techniques
Looks like a good read. Thanks On Mon, Jul 12, 2010 at 2:39 AM, Ulrich Bangert wrote: > Gentlemen, > > here is a paper that I found by luck which gives a good overview about > picosecond resolution measurements: > > http://ztc.wel.wat.edu.pl/kalisz/met4_1_004.pdf > > Best regards > > Ulrich Bangert > www.ulrich-bangert.de > Ortholzer Weg 1 > 27243 Gross Ippener > > > ___ > 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 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] High Voltage lead on HP Cesium Tubes
Great question. I noticed the same on my dead unit. That indeed may be why I had to readjust the 3500 supply as I recall. On Sun, Jul 11, 2010 at 11:32 PM, J. L. Trantham wrote: > Has anyone ever replaced a high voltage lead on an HP Cesium tube? > > I have a 5061A that required prolonged pumping at +6000 VDC to get the Ion > Pump current to go down enough to allow the unit to turn on the CS Oven but > then would slowly increase to the point that it would again not let the CS > Oven turn on. > > At +6000 VDC, the current would be about 1400 uA but only about 30 uA at > +4000 VDC. It got me to thinking that there was some sort of HV breakdown > going on. On inspecting the tube and HV lead more carefully, I found the > +3500 VDC lead cracked and considerable 'soot' on the silicone 'cap' on the > tube where the red HV lead entered the tube. I removed the connector, > cleaned the wire and silicone cap, separated the silicone from the lead and > slid some heat shrink tubing over the wire and into the silicone cap. I > used the heat gun to shrink it in place then placed another layer on this. > > Now, the tube seems to work OK (at least observing it for about 48 hours) > with the Ion Pump I stable at about 6 and with no increase, a distinct > change and improvement from before. > > Perhaps I should be satisfied with what I have got but I was wondering what > is under the silicone caps and how to go about removing them to replace the > +3500 VDC and -2500 VDC leads. > > Does anyone have any experience with this? > > Thanks in advance. > > Joe > > > ___ > 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 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] Loran-C Anthorn
EB4APL wrote: A word of caution here: Don't trust Google maps coordinates for any technical / serious work, they can have errors in the 100´s meter class. And also don't use the copyright date of the maps and images as a time reference, they normally are older than that. If you live in an area under urban development you can check what I mean. Take in account that this is a beautiful thing for locating a restaurant or a route, and can be classified as a geomarketing tool, not a measuring one. For that matter, what ellipsoid is google maps using? GPS is WGS84, but many (if not all) topographic maps in the US are still NAD27 (the corrections are in the bottom left corner). The difference in horizontal position around where I live is some 30-40 meters. Google has to reconcile their imagery, their map data, and their topography somehow, and I imagine they take it all to some common ellipsoid, but it's possible they don't. (That is, nobody is using Google earth to fly a plane across oceans) Especially if you are using digital elevation models (DEMs) (e.g. to do propagation path analysis), you can be off by 50-100 meters comparing the topography in the DEM to the feature on the ground. A "3 second" DEM has horizontal control comparable to a 1:250,000 map. If you see that phrase at the bottom of a USGS map "Meets national map accuracy standards" it helps to know that the standard is basically "positions are accurate to the diameter of a pencil point or about 1/50th of an inch: 0.5 mm)" 0.5mm on a 1:250,000 map is 125 meters. Google is my friend, and I turned up the following with respect to Google Earth (which is NOT the same as Google Maps, apparently) "We represent the earth as a sphere (special case of an ellipsoid). The surface of our sphere corresponds to 0 meters sea level. As far as the KML coordinate system, we consider 0 meters altitude to be sea level, and we draw KML and terrain in a way that's consistent with that. Specifically, the EGM96 geoid is our sea level, a potato-like shape that's smoothly varying but not perfectly smooth, and represents mean sea level around the globe. The geoid (and therefore sea level) is offset from the ideal WGS84 reference ellipsoid by as much as 200 meters or so in some places. " ___ 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] Rubidium oscillator controlled clock
Bernd, > Would you recommend simple 74xx74 flipflops > driven by the original 10 MHz signal delivered by the > rubidium oscillator for resynching? In principle, yes. However not directly clocked by the rubidium itself but from a clean ttl signal that has been made out of the LPRO's sine. There has been a long discussion here about the "howto" of this. As a good starting point I suggest this: http://www.ko4bb.com/~bruce/CLKSHPR.html While the ADCMP600 are available well in Germany (for example from FARNELL) the MSOP enclosure is very tricky to solder and for a bit less in frequency performance a LT1016 will do it for you too. Best regards Ulrich Bangert > -Ursprungliche Nachricht- > Von: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] Im Auftrag von ulm...@vaxman.de > Gesendet: Montag, 12. Juli 2010 14:06 > An: TIME-NUTS@febo.com > Betreff: Re: [time-nuts] Rubidium oscillator controlled clock > > > Hello Ulrich - > thank you very much for kind reply - this is a great > suggestion. Would you recommend simple 74xx74 flipflops > driven by the original 10 MHz signal delivered by the > rubidium oscillator for resynching? > Thank you very much and have a great day - sincerely, Bernd. :-) > > ___ > 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 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] Rubidium oscillator controlled clock
Bernd, On 07/12/2010 02:05 PM, ulm...@vaxman.de wrote: Hello Ulrich - thank you very much for kind reply - this is a great suggestion. Would you recommend simple 74xx74 flipflops driven by the original 10 MHz signal delivered by the rubidium oscillator for resynching? That should do the trick. Even if I doubt the gain would be significant, you can use both the DFFs in there in series. It is the common way to reduce the effect of unsynchronized signal into DFFs as there may be meta-stability, so using two DFFs in series helps reducing the added noise if the first DFF goes meta-stable. The '74 should be protected to some degree if I recall things correctly, but it's there and free... so why not? Cheers, Magnus ___ 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] GPS Timing Source -- looking at buying
Hi The original post simply mentioned EBU. Thus the confusion. Bob On Jul 11, 2010, at 8:23 AM, "Ed, k1ggi" wrote: > Keep in mind, SMPTE/EBU is timecode, AES/EBU is digital audio. > 3 orders of magnitude difference in the bit rates. > Chris was talking timecode. > Ed > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Bob Camp > Sent: Friday, July 09, 2010 8:38 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] GPS Timing Source -- looking at buying > > Hi > > The Thunderbolt has a GPS and an OCXO inside it. It's built in smarts align > a PPS created from the OCXO to the GPS PPS. This allows the PPS to be more > stable than a normal GPS PPS (less jitter). It also provides holdover on the > PPS if and when GPS sat's are not available. > > Since your ultimate objective is (I think) AES / EBU timing, jitter is an > important consideration. > > Bob > > > On Jul 9, 2010, at 3:10 AM, Chris H wrote: > >> I might go for the Garmin one to start with, and see how it all works.. >> and then move up to a more reliable source of timing source in the >> future... >> >> When you say Reliable, what exactly do you all mean--- >> does it loose time? >> Does it loose lock to the satellites? >> because it's only millisecond accurate, is that your concerns >> >> Please correct me if I am wrong: >> >> If it's pulsing every second, and that second is generated by the lock >> to the satellite, then should it not be as accurate as the device that >> it's getting it's lock from? >> >> (Sorry I am new to all this) >> >> >> On Fri, 2010-07-09 at 19:02 +1200, Chris H wrote: >>> Yes sorry -- stratum 1 -- brain fart :( >>> >>> >>> >>> On Fri, 2010-07-09 at 06:32 +, Paul Nicholson wrote: Chris H wrote: > Would be good as a timing source for GPS > ... make a PC into a Stratum 0 timing device? I think it would count as stratum 1, since you are 1 hop away from a master time source. This page may be of interest, http://www.satsignal.eu/ntp/FreeBSD-GPS-PPS.htm Trimble Thunderbolts have been recommended on this list as a proper timing grade GPS, superior to these EOM Garmin GPS units. There's a reliable source of Thunderbolts on E-bay. I currently have one of these on order, http://cgi.ebay.co.uk/290322053618 -- Paul Nicholson -- ___ 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 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 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 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 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 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] Rubidium oscillator controlled clock
Hello Ulrich - thank you very much for kind reply - this is a great suggestion. Would you recommend simple 74xx74 flipflops driven by the original 10 MHz signal delivered by the rubidium oscillator for resynching? Thank you very much and have a great day - sincerely, Bernd. :-) ___ 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] Loran-C Anthorn
A word of caution here: Don't trust Google maps coordinates for any technical / serious work, they can have errors in the 100´s meter class. And also don't use the copyright date of the maps and images as a time reference, they normally are older than that. If you live in an area under urban development you can check what I mean. Take in account that this is a beautiful thing for locating a restaurant or a route, and can be classified as a geomarketing tool, not a measuring one. You can verify this yourself easily comparing your GPS antenna location with the coordinates given by the program and also looking for roads, etc. mismatches in the image seams. I had to explain this a lot of times to guys trying to do shortcuts for technical projects. Regards, Ignacio, EB4APL Peter Vince wrote: Hello Antonio, Looking at the aerial photographs on Google Maps, the transmitter building can be seen at 54.91224°N, 3.27831°W - nearer Cardurnock than Anthorn! Which are the actual aerial masts though, I don't know. Might I suggest you contact Peter Whibberley at the National Physical Laboratory (peter.whibberley (at) npl . co . uk) - if he can't tell you, he will certainly know who can! Regards, Peter Vince On 12 July 2010 00:40, wrote: Greetings to the group. I would like to have the exact (and trustworthy...) WGS84 coordinates of the Anthorn Loran-C antenna. Searching the net I got at least three different sets of LAT/LONG. It seems to me that exactitude is not a cult anymore, except for us the nutties... I would also appreciate to have the exact Coding Delay for that transmitter. (Not the Emission Delay, which is known to be 27,300.00 uS). Thanks in advance. Antonio CT1TE ___ 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. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com __ ___ 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 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] Loran-C Anthorn
note that at 54,9 degrees, one least significant decimal digit in the latitude/longditude is approx 11cm/6cm . That might well explain why there are multiple references. Le 12/07/2010 11:46, Peter Vince a écrit : Hello Antonio, Looking at the aerial photographs on Google Maps, the transmitter building can be seen at 54.91224°N, 3.27831°W - nearer Cardurnock than Anthorn! Which are the actual aerial masts though, I don't know. Might I suggest you contact Peter Whibberley at the National Physical Laboratory (peter.whibberley (at) npl . co . uk) - if he can't tell you, he will certainly know who can! Regards, Peter Vince On 12 July 2010 00:40, wrote: Greetings to the group. I would like to have the exact (and trustworthy...) WGS84 coordinates of the Anthorn Loran-C antenna. Searching the net I got at least three different sets of LAT/LONG. It seems to me that exactitude is not a cult anymore, except for us the nutties... I would also appreciate to have the exact Coding Delay for that transmitter. (Not the Emission Delay, which is known to be 27,300.00 uS). Thanks in advance. Antonio CT1TE ___ 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. __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com __ ___ 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 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] Loran-C Anthorn
Hello Antonio, Looking at the aerial photographs on Google Maps, the transmitter building can be seen at 54.91224°N, 3.27831°W - nearer Cardurnock than Anthorn! Which are the actual aerial masts though, I don't know. Might I suggest you contact Peter Whibberley at the National Physical Laboratory (peter.whibberley (at) npl . co . uk) - if he can't tell you, he will certainly know who can! Regards, Peter Vince On 12 July 2010 00:40, wrote: > Greetings to the group. > > I would like to have the exact (and trustworthy...) WGS84 coordinates > of the Anthorn Loran-C antenna. Searching the net I got at least three > different sets of LAT/LONG. It seems to me that exactitude is not a cult > anymore, except for us the nutties... > > I would also appreciate to have the exact Coding Delay for that transmitter. > (Not the Emission Delay, which is known to be 27,300.00 uS). > > Thanks in advance. > > Antonio > CT1TE > > > ___ > 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. > > __ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit > http://www.messagelabs.com >__ > ___ 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.
