Re: [time-nuts] Number of GPS sats in the sky?
http://www.navcen.uscg.gov/?Do=constellationStatus http://www.gps.gov/systems/gps/space/ IIRC: 6 planes, 6 slots each, so 36 to cover the sphere, and the GPS aperture is big (high orbits) so guess up to 1/2 of the constellation could ever be in view (... yeah, right): 18? On Thu, Jul 9, 2015 at 10:54 AM, Bob Stewart b...@evoria.net wrote: Is there a practical limit to the number of GPS sats overhead at any one time? I ask this because I'd like to start parsing this info from my ublox receiver and need to setup an array for the values. Memory is not unlimited on my PIC. Bob - AE6RV ___ 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. -- /ch KG60 atsin arrl dot net ___ 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] What's the easiest way to divide by 10 for Thunderbolt reference output?
John, That's interesting to me. What exactly are the actual structural limitations of [that] pic? -CH On Jul 24, 2012, at 7:55, John Ackermann N8UR j...@febo.com wrote: Unfortunately, the TAPR T2-Mini divider (http://www.tapr.org/kits_t2-mini.html) can't quite get to 1 MHz from 10 MHz with the PIC divider chip due to limitations in the chip architecture. However, nothing says you couldn't dead bug in a decade divider chip in place of the PIC, and let the T2-Mini provide the input conditioning, output driver, voltage regulation, connectorization, etc. for you, making it much a smaller project. John On 7/24/2012 8:18 AM, Chris Wilson wrote: 24/07/2012 13:14 My Racal Dana 9908 can take a 1 Mhz external reference. Inputting my Thunderbolt at 10 MHz works, but shifts the decimal point over. I am not sure if this has any other detrimental effects as to accuracy or other? What's the easiest way to have a 1 MHz reference from the Thunderbolt for this timer / counter please, yet retaining 10 Mhz for my other devices that want a 10MHz reference signal? Thanks. ___ 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] Timing Health Monitoring
Richard, This paper is fascinating to me. I finally understand how the TMDE/Metrology lab to which I continually sent my measurement equipment for calibration was so important. Looking back, I recall something that looked exactly like an FMS rack shown in the paper! It was accompanied by a make-shift cubicle with walls of HP and Marconi gear in various states... and a sweet, aged, bearded geek with trifocals... It's telling, I think, that the first FMS was built on an Apple II. -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us On Jul 18, 2012, at 7:00 PM, Richard H McCorkle wrote: Chris, If you have multiple standards to monitor (or may have in the future) you might consider building a small version of the NIST FMAS board described in http://tf.nist.gov/general/pdf/1950.pdf to keep track of them. Richard What advice does anyone have on building/finding cheap [visual?] comparison devices to display or detect a timing [lesajo?] from my 10MHz sine wave ports? Further, what timing/health metrics could/should I be aware of and/or looking for? I do not want to spend good money on another oscillicope if I can help it, but I do want to see, or at least be remotely aware of clock slips/walks and other anomalies. I am thinking about building an embedded system to automate monitoring, configuration, and alerts... perhaps using an Arduino. -CH ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions 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] Zero-Crossing Detector Design?
Can anyone suggest a good reference design for a zero-crossing detector? I am trying to home an ADC sampler trigger to the 1VRMS (50ohm) 10MHz sin from my XL-DC... And now I'm thinking that I should just home the uC clock to it, as well. Essentially, I believe that I'm looking for an efficient, stable, and accurate sine-to-square converter... and I'll welcome any advice in this area. This may also be used in a 1KHz 5Vpp IRIG-B decoder... I don't feel like rectifying the signal, to be honest. I want to try to keep a smaller BOM, sense the waveform primarily, and crunch numbers inside the uC. -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us ___ 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] Trimble Mini-T end of life
How about a couple of buffers for counting external (opto-isolated) pulses or sines? A 1 to 5Vpp range might do it, maybe with a sensitivity north of 100MHz? -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us On Jul 19, 2012, at 12:15 AM, saidj...@aol.com wrote: Hello everyone, please send suggestions for the following new product we are working on: Trimble recently announced that the Mini-T is end of life, and is giving a last time buy of August 1st 2012. It does not seem that Trimble plans to offer a replacement unit. The Mini-t enjoyed a relatively short lifetime, and it seems Trimble has left it's customers hanging in the air, as when it discontinued the Thunderbolt some time ago. Jackson Labs Tech is in the process of designing a replacement unit for the Mini-T that customers will be able to use as a direct replacement so that they don't have to order more units than they need and don't have to cancel running projects, but this unit will have much higher performance and significantly more features and options to chose from. Availability of evaluation units is early next month, and it will not be discontinued as long as there is demand. There is still a window of opportunity to suggest added useful features, so please do send your suggestions to me as to what you would like to see in a perfect Mini-T replacement unit. We will consider all reasonable suggestions and requests. Thanks much in advance, Said ___ 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] Zero-Crossing Detector Design?
Thank you, Azelio! I don't suppose there's an impromptu FAQ page out there, is there? -CH On Jul 19, 2012, at 11:58, Azelio Boriani azelio.bori...@screen.it wrote: This is sort of a FAQ: the argument was already discussed here. One of the most interesting idea (in my opinion) is to use an RS485 line receiver like the ST3485, MAX483, ADM485. They are actually transceivers so they must be tied permanently in RX. Since they are differential you can also put a 1:1 (or a 1:4 to raise the level) transformer to isolate the input too. On Thu, Jul 19, 2012 at 6:03 PM, Chris Hoffman cq.k...@gmail.com wrote: Can anyone suggest a good reference design for a zero-crossing detector? I am trying to home an ADC sampler trigger to the 1VRMS (50ohm) 10MHz sin from my XL-DC... And now I'm thinking that I should just home the uC clock to it, as well. Essentially, I believe that I'm looking for an efficient, stable, and accurate sine-to-square converter... and I'll welcome any advice in this area. This may also be used in a 1KHz 5Vpp IRIG-B decoder... I don't feel like rectifying the signal, to be honest. I want to try to keep a smaller BOM, sense the waveform primarily, and crunch numbers inside the uC. -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us ___ 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] Zero-Crossing Detector Design?
Actually, I being new to the list, I do not feel I the correct verbiage. That said, I will do better on keeping the noise down. Again, my thanks. -CH On Jul 19, 2012, at 12:23, paul swed paulsw...@gmail.com wrote: you can search time-nuts there has been a number of very good discussions on this. Sorry to say how you search is equally a good question. On Thu, Jul 19, 2012 at 3:19 PM, Chris Hoffman, KG6O cq.k...@gmail.comwrote: Thank you, Azelio! I don't suppose there's an impromptu FAQ page out there, is there? -CH On Jul 19, 2012, at 11:58, Azelio Boriani azelio.bori...@screen.it wrote: This is sort of a FAQ: the argument was already discussed here. One of the most interesting idea (in my opinion) is to use an RS485 line receiver like the ST3485, MAX483, ADM485. They are actually transceivers so they must be tied permanently in RX. Since they are differential you can also put a 1:1 (or a 1:4 to raise the level) transformer to isolate the input too. On Thu, Jul 19, 2012 at 6:03 PM, Chris Hoffman cq.k...@gmail.com wrote: Can anyone suggest a good reference design for a zero-crossing detector? I am trying to home an ADC sampler trigger to the 1VRMS (50ohm) 10MHz sin from my XL-DC... And now I'm thinking that I should just home the uC clock to it, as well. Essentially, I believe that I'm looking for an efficient, stable, and accurate sine-to-square converter... and I'll welcome any advice in this area. This may also be used in a 1KHz 5Vpp IRIG-B decoder... I don't feel like rectifying the signal, to be honest. I want to try to keep a smaller BOM, sense the waveform primarily, and crunch numbers inside the uC. -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us ___ 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] Zero-Crossing Detector Design?
Thank you, Bruce!!! That is exactly the information I was looking for. I sincerely appreciate the help. -CH On Jul 19, 2012, at 12:47, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote: The problem of optimal zero crossing detector design was essentially solved by Oliver Collins in the 1990's. Essentially a series of cascaded limiter stages with appropriate gain and bandwidth distribution are used. With a 10MHz 1V rms signal only 2-3 stages suffices. However unless you need fs jitter less complex zero crossing detectors should suffice. 1) a comparator (or line receiver) based design should achieve sub 10ps jitter. 2) AC coupling to the input of a CMOS (AC04, AHC04 LVC04) should achieve a jitter of 1ps or less 3) A simple differential pair with AC coupled emitters (reduces asymmetry due to component tolerances ) is capable of sub ps jitter. There is a spreadsheet to assist design of Collins style zero crossing detectors at: http://www.ko4bb.com/~bruce/ZeroCrossingDetectors.html http://www.ko4bb.com/%7Ebruce/ZeroCrossingDetectors.html Bruce paul swed wrote: you can search time-nuts there has been a number of very good discussions on this. Sorry to say how you search is equally a good question. On Thu, Jul 19, 2012 at 3:19 PM, Chris Hoffman, KG6Ocq.k...@gmail.comwrote: Thank you, Azelio! I don't suppose there's an impromptu FAQ page out there, is there? -CH On Jul 19, 2012, at 11:58, Azelio Borianiazelio.bori...@screen.it wrote: This is sort of a FAQ: the argument was already discussed here. One of the most interesting idea (in my opinion) is to use an RS485 line receiver like the ST3485, MAX483, ADM485. They are actually transceivers so they must be tied permanently in RX. Since they are differential you can also put a 1:1 (or a 1:4 to raise the level) transformer to isolate the input too. On Thu, Jul 19, 2012 at 6:03 PM, Chris Hoffmancq.k...@gmail.com wrote: Can anyone suggest a good reference design for a zero-crossing detector? I am trying to home an ADC sampler trigger to the 1VRMS (50ohm) 10MHz sin from my XL-DC... And now I'm thinking that I should just home the uC clock to it, as well. Essentially, I believe that I'm looking for an efficient, stable, and accurate sine-to-square converter... and I'll welcome any advice in this area. This may also be used in a 1KHz 5Vpp IRIG-B decoder... I don't feel like rectifying the signal, to be honest. I want to try to keep a smaller BOM, sense the waveform primarily, and crunch numbers inside the uC. -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us ___ 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] Timing Health Monitoring
Ah! The very height of elegance in a good design [imho] : no upgrade needed. -CH On Jul 19, 2012, at 12:40, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 07/19/2012 05:48 PM, Chris Hoffman wrote: Richard, This paper is fascinating to me. I finally understand how the TMDE/Metrology lab to which I continually sent my measurement equipment for calibration was so important. Looking back, I recall something that looked exactly like an FMS rack shown in the paper! It was accompanied by a make-shift cubicle with walls of HP and Marconi gear in various states... and a sweet, aged, bearded geek with trifocals... It's telling, I think, that the first FMS was built on an Apple II. The NIST time-scale algorithm was run on a PDP-8 with 5kWord memory. It used to run on a pair of AT machines, but they have upgraded to a pair of 386s now. Every 12 min they will execute for 40 s and then go back to idle waiting. Processing-wise, there is no need to get more modern machines. Can't recall seeing that paper, so thanks for the reference. Had a nice chat with one of the techs dealing with those services. Very nice folks! 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 mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] time-nuts Digest, Vol 96, Issue 70
Wow! Great info. The 5v mag mount antennae are working, but the receivers are cycling between 2-D and 3-D (5 or 6-bird) modes. With the 26dB trimbles, I suspect I'm loosing ~5db in the 30ft of crumby RG-5, and a little pattern with my rain-gutter backplane. I don't have too much arial obstruction, but that's no excuse from overkill: I'll be on the lookout for 26- or 40[?!?]-dB cones. Does anyone have a Lucent part number available? -CH On Jul 17, 2012, at 5:00, time-nuts-requ...@febo.com wrote: Send time-nuts mailing list submissions to time-nuts@febo.com To subscribe or unsubscribe via the World Wide Web, visit https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts or, via email, send a message with subject or body 'help' to time-nuts-requ...@febo.com You can reach the person managing the list at time-nuts-ow...@febo.com When replying, please edit your Subject line so it is more specific than Re: Contents of time-nuts digest... Today's Topics: 1. Re: XL-DC Antenna Requirements (Tom Knox) 2. Re: XL-DC Antenna Requirements (Bob Martin) -- Message: 1 Date: Mon, 16 Jul 2012 18:11:59 -0600 From: Tom Knox act...@hotmail.com To: Time-Nuts time-nuts@febo.com Subject: Re: [time-nuts] XL-DC Antenna Requirements Message-ID: bay162-w4046e629af83f1d3bded81df...@phx.gbl Content-Type: text/plain; charset=iso-8859-1 Hi Chris; There were a number of XL-DC produced with 12vdc antenna power and should be marked near the connector. There are also some marked Down converter required. Other then then those the 58532A is a great choice andf sold under a number of names such as VIC-100, the Lucent antennas are also nice. The lucent are available in three gains 20, 26, 40 dB version. Most are the 26dB version and are a great product. Placement can be important, and although you could use indoors it will perform best as low as possible with a full view of the sky. (Low to avoid terrestrial interference). Thomas Knox Date: Tue, 17 Jul 2012 00:50:02 +0200 From: azelio.bori...@screen.it To: time-nuts@febo.com Subject: Re: [time-nuts] XL-DC Antenna Requirements The XL-DC is a 6 channels receiver, so no other benefit other than a greater probability to see constantly 6 satellites is gained from 24 to 32 satellites constellation. On Mon, Jul 16, 2012 at 11:59 PM, Chris Hoffman cq.k...@gmail.com wrote: All, Though somewhat outmoded, looking forward to starting my own time shop with two XL-DC controllers that I have been lucky enough to pick up recently. My question: Do I really need to invest in the likes of the HP 58532A antennae, or will my surplus Trimble magnetic antennae -- magnetically attached to a random ferrous backplane -- do? I guess what I am really asking: what are the relevant antenna design requirements here, and does the advent of as 32-satellite-constellation have any effect upon the antenna choice (i.e. design downgrade) for the TrueTime XL-DC? -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us ___ 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. -- Message: 2 Date: Mon, 16 Jul 2012 18:02:49 -0700 From: Bob Martin k6...@comcast.net To: time-nuts@febo.com Subject: Re: [time-nuts] XL-DC Antenna Requirements Message-ID: 8dbef16d-ce19-4088-9347-458c02a53...@comcast.net Content-Type: text/plain;charset=us-ascii Chris-- The 58532A is somewhat higher gain (30dBi or better) than most mag-mount antennas (26dBi typ IIRC). The pointy nature of the 58532A also serves as an avian deterrent, reducing the accumulation of attenuating deposits... Running two receivers, I would highly recommend a real GPS distribution amp such as the 58535A. Such a beast will let you run both receivers from one antenna, while providing isolation between the receivers. I just happen to have one handy, having recently pulled it out of service and replaced it with a 4-port model to better support my time-nuttiness. Contact me off list if you would be interested. 73 Bob k6...@arrl.net On Jul 16, 2012, at 16:01, time-nuts-requ...@febo.com wrote: Message: 1 Date: Mon, 16 Jul 2012 14:59:52 -0700 From: Chris Hoffman cq.k...@gmail.com To: time-nuts@febo.com Subject: [time-nuts] XL-DC Antenna Requirements Message-ID: 0208b173-9f7b-49b9-ae83-ee231ebba...@gmail.com Content-Type: text/plain;charset=us
[time-nuts] Timing Health Monitoring
What advice does anyone have on building/finding cheap [visual?] comparison devices to display or detect a timing [lesajo?] from my 10MHz sine wave ports? Further, what timing/health metrics could/should I be aware of and/or looking for? I do not want to spend good money on another oscillicope if I can help it, but I do want to see, or at least be remotely aware of clock slips/walks and other anomalies. I am thinking about building an embedded system to automate monitoring, configuration, and alerts... perhaps using an Arduino. -CH ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timing Health Monitoring
Mr. Sproul: I really like your solution! Do you mind emailing me code and schematics? Bob, you right: I should be watching slips with a PPS-actuated buffer. For now, I don't have the resources for a ready-made dual-input counter, but the strangest/best things seem to show up at the flea market when I'm least expecting them ;) For now, I will be conducting research on integrating a rudimentary counter on top of Mr. Sproul's design. Chris: It should be no issue to take your comparator and 'tape' an A/D pin to it for digital monitoring, either (I'm not sure how Bob's design is implemented, but it appears roughly equivalent). Do you have any examples I should be looking for? -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us On Jul 17, 2012, at 11:51 AM, MSproul wrote: On Jul 17, 2012, at 11:09 AM, Chris Hoffman, KG6O wrote: What advice does anyone have on building/finding cheap [visual?] comparison devices to display or detect a timing [lesajo?] from my 10MHz sine wave ports? I am thinking about building an embedded system to automate monitoring, configuration, and alerts... perhaps using an Arduino. -CH__ Hi Chris I am doing what you are asking about. I have built a Frequency Comparator that compare two10 MHz square waves but would probably work with sine waves. I am using a Digilent. Inc. chipKIT Uno32. http://digilentinc.com/Products/Detail.cfm?NavPath=2,892,893Prod=CHIPKIT-UNO32. This board is comparable to the Arduino and most of the shields for the Arduino will work with the chipKIT. To program the chipKIT requires the Mpide program from Digilent. The program is free (from the above site) AND will program both the Arduino and chipKIT, just select the proper option. No change in source code is required to compile for the Arduino or chipKIT. The program looks just like the one from Arduino. The attached photo shows the display of my comparator. The first line is the name of the source code The second line is error between reference and Device under Test and whether the DUT is high or low The third line is current time between cycle slips The fourth line is the current error and is continually updated during a cycle slip The LEDs at the top give a visual presentation of the cycle slips: Left-moving - DUT is LOW., right-moving - the DUT is HIGH The hardware only requires 6 ICs plus LEDs and a few passive parts. The program is not finished yet. I still have to do some long-term testing and some minor 'tweaking but does what I want. It is very interesting to watch an oscillator from a cold start. The lights will race one direction, slow down, stop, then race the other direction until it finally slows down and stops. M. L. Sproul, W5UGQ Amarillo, TX mspr...@suddenlink.net FreqComp.JPG ___ 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] XL-DC Antenna Requirements
All, Though somewhat outmoded, looking forward to starting my own time shop with two XL-DC controllers that I have been lucky enough to pick up recently. My question: Do I really need to invest in the likes of the HP 58532A antennae, or will my surplus Trimble magnetic antennae -- magnetically attached to a random ferrous backplane -- do? I guess what I am really asking: what are the relevant antenna design requirements here, and does the advent of as 32-satellite-constellation have any effect upon the antenna choice (i.e. design downgrade) for the TrueTime XL-DC? -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us -CH Chris Hoffman cq.k...@gmail.com http://ar.ctur.us ___ 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.
