Re: [time-nuts] SDR Radio Opinion ?
Some discussion groups and Wikis you may find useful: Ultra cheap SDR: http://groups.google.com/group/ultra-cheap-sdr FUNcube Dongle: http://funcubedongle.pbworks.com http://uk.groups.yahoo.com/group/Fcdproplus/ SDR# software: http://sdrsharp.pbworks.com http://uk.groups.yahoo.com/group/SDRSharp/ BTW: I've found it quite difficult to get people to contribute to the Wiki, so if you want to add something please let me know and I can set you up with author rights. Cheers, David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] Trimble Nortel GPSTM Boards
In Lady Hather, set the elevation mask to a low value, clear the signal level data (S A C), let the unit run for a day or so, then do the oscillator autotune (A). This will set the elevation mask to a level that matches what your antenna can see. Or you can check the elevation plot (S A E) and see where the tick mark shows the signal level dropping off and enter that value manually. ___ 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] Low cost GPS for model aircraft
It would now pretty much be illegal in Texas. Our Wise Legislature has pretty much banned aerial photography unless you have the written permission of everybody in the images and landowners of all properties. Definition of aerial photos? Apparently anything taken from more than 6 feet off the ground. Tall person? Tough luck, get on your knees to snap your photos... -- For a very low cost Ready To Fly quad copter that includes a TV camera see: http://www.prc68.com/I/DCpmMotors.html#Heli-Max ___ 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] SDR Radio Opinion- Next Question
Hi Chris, The Mac OS X user base is also growing rapidly, with many preferring the X desktop to Winders. And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't like OS X.. It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio. Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd. --marki ___ 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 Nortel GPSTM Boards
Hi Jim, Yes I did, no value was perfect in this respect, ie as affecting the DAC steps, so settled on 20 as a bit of a compromise. The number of sats being tracked still seems to be a factor in the equation, setting an elevation angle of 20 degrees had quite a smoothing effect last night, today I'm back to much more noticeable steps again. Although I have used Lady Heather in the past I've tended rather to stick with Trimbles own more simplistic software for making basic adjustments and just to ensure things are set up and working ok, so I'm back on a fairly steep learning curve and perhaps being given too much information for my own good:-) Regards Nigel GM8PZR In a message dated 06/08/2013 01:15:17 GMT Daylight Time, wb4...@wb4gcs.org writes: Did you /increase/ the elevation mask? Jim wb4...@amsat.org On 8/5/2013 8:06 PM, gandal...@aol.com wrote: Many thanks to those who commented on this and apologies for the delayed response, having spent a few days in an internet free zone I've also had to contend with a couple of power failures since returning but am just about getting back to normal again, whatever normal might be:-) As suggested, changing the elevation mask does make a difference to the DAC voltage jumps, I'd just run up Lady Heather on default settings to start with which sets it to 10 degrees and changing that to 20 degrees, for example, has reduced the steps in the DAC voltage as sats come and go, they're still there but not so pronounced. Having said that, comparing this with a Thunderbolt, albeit using another Thunderbolt as the reference for both, does tend to give more pronounced steps on the Thunderbolt for the same elevation mask and sensitivity settings. As others have commented previously I'm also noticing the much reduced temperature sensitivity of this unit compared with the Thunderbolt which is quite a big plus, but it's not all totally one sided, both Lady Heather and a couple of Pendulum counters are showing somewhat lower Adev values for the Thunderbolt although the plots of frequency against time show very similar limits. Either way, so far at least this does seem to be working well. I still haven't heard from anyone who's run the two available GPSTM variants side by side so I'm still debating whether or not to try that for myself, or whether to just quit whilst I'm ahead:-) Regards Nigel GM8PZR In a message dated 31/07/2013 22:48:13 GMT Daylight Time, gandal...@aol.com writes: Having stuck a late bid on a recent auction for what I'd assumed was a Trimble Nortel NTGS50AA I then realised I'd just bought the single board version, part number 4500-00-CH with the Trimble 49422-CR OCXO. That in itself wasn't a problem, except perhaps the doubts cast over my sanity:-), it arrived earlier today and has been running for several hours now, chatting comfortably with Lady Heather, and generally settling in nicely. However, it does prompt the question, has anyone had a chance to compare one of these side by side with an NTGS50AA and, if so, were there any obvious differences in performance? 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. ___ 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] Trimble Nortel GPSTM Boards
Hi Bjorn, Many thanks for the tip, I'd seen discussions on the two part boards, NTGS50AA, but hadn't realised the extent to which this version had also been mentioned. Given that it was discussed as recently as early July, including comments on the wheel I've just reinvented, and that I did read those comments at the time, I think it's perhaps time I took a break, or wrote out 500 times...I must pay more attention :-) Regards Nigel GM8PZR In a message dated 01/08/2013 20:21:00 GMT Daylight Time, b...@lysator.liu.se writes: Hi Nigel! This has been discussed before in time-nuts. I have two of the big boards, but they are not running right now. If I remember correctly the big ones are more of a cost reduction model compared to the 2 board split solition. Giving lower SV snr than the split version. But my ran just fine compared to my standard Tbolts. -- Björn Skickat från min Mobil Originalmeddelande Från: gandal...@aol.com Datum: 2013-08-01 11:09 (GMT+01:00) Till: time-nuts@febo.com Rubrik: Re: [time-nuts] Trimble Nortel GPSTM Boards Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. ** * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ 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] Trimble Nortel GPSTM Boards
Thanks Mark I'll start over and will do as you suggest. I'm sure you'll have been told this many times before but Lady Heather is an amazing piece of software, thank you, even if I do feel at times that I'm suffering from severe information overload:-) I guess this might be more a question for John Miles, to whom also many thanks for the Windows version, but I've noticed that, here at least, LH seems much happier running under XP than it does under Windows 7, unless of course it's a hardware issue. On a 3GHz P4, using a native serial port under XP, I'm seeing around 10% CPU load with time and data updating smoothly, whilst on a 2GHz dual core laptop using a serial to USB adapter under Win7 although it runs ok the CPU load is showing as around 50% and updates are erratic. It will tick away nicely for several seconds, then pause before making a dash to catch up, which it never quite manages with the display always at least a few seconds behind the XP machine. It's not a major problem, I can run more serial ports on the XP machine anyway, and I've not yet spent any time investigating further but it is just heather.exe that's showing as loading the CPU, so thought I'd ask first. Regards Nigel GM8PZR In a message dated 06/08/2013 08:10:49 GMT Daylight Time, hol...@hotmail.com writes: In Lady Hather, set the elevation mask to a low value, clear the signal level data (S A C), let the unit run for a day or so, then do the oscillator autotune (A). This will set the elevation mask to a level that matches what your antenna can see. Or you can check the elevation plot (S A E) and see where the tick mark shows the signal level dropping off and enter that value manually. ___ 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] Rb video
Found this on Hack-a-day http://www.youtube.com/watch?v=chrzrod3tQY Cheers -- Raj, VU2ZAP Bangalore, India. ___ 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] motorola GPS antenna connector
Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ 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] motorola GPS antenna connector
My records show the B1121P1114 as a 6 channel Oncore VP, which means it should be the same receiver as used in the Z3801A although I haven't looked to check that. The standard connector on these was what's known as an OSX Regards Nigel GM8PZR In a message dated 06/08/2013 10:25:27 GMT Daylight Time, ma...@non-stop.com.au writes: Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ 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] motorola GPS antenna connector
Can't seem to find anything in Aussie that is Called OSX connector. Could they be called MCX connector? We got some of those ): --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, 6 August 2013 7:43 PM To: time-nuts@febo.com Subject: Re: [time-nuts] motorola GPS antenna connector My records show the B1121P1114 as a 6 channel Oncore VP, which means it should be the same receiver as used in the Z3801A although I haven't looked to check that. The standard connector on these was what's known as an OSX Regards Nigel GM8PZR In a message dated 06/08/2013 10:25:27 GMT Daylight Time, ma...@non-stop.com.au writes: Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ 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] Rb video
Found this on Hack-a-day http://www.youtube.com/watch?v=chrzrod3tQY Cheers Raj, VU2ZAP Bangalore, India. === Thanks for the pointer - I enjoyed that, particularly the PIC programming! 73, David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] motorola GPS antenna connector
Yes, it's MCX connector, I replaced one on my VP oncore board. Hui At 2013-08-06 18:19:53,Mark C. Stephens ma...@non-stop.com.au wrote: Can't seem to find anything in Aussie that is Called OSX connector. Could they be called MCX connector? We got some of those ): --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, 6 August 2013 7:43 PM To: time-nuts@febo.com Subject: Re: [time-nuts] motorola GPS antenna connector My records show the B1121P1114 as a 6 channel Oncore VP, which means it should be the same receiver as used in the Z3801A although I haven't looked to check that. The standard connector on these was what's known as an OSX Regards Nigel GM8PZR In a message dated 06/08/2013 10:25:27 GMT Daylight Time, ma...@non-stop.com.au writes: Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ 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] motorola GPS antenna connector
Ah, yes, sorry I forgot that, it's the same thing. Regards Nigel GM8PZR In a message dated 06/08/2013 11:20:26 GMT Daylight Time, ma...@non-stop.com.au writes: Can't seem to find anything in Aussie that is Called OSX connector. Could they be called MCX connector? We got some of those ): --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, 6 August 2013 7:43 PM To: time-nuts@febo.com Subject: Re: [time-nuts] motorola GPS antenna connector My records show the B1121P1114 as a 6 channel Oncore VP, which means it should be the same receiver as used in the Z3801A although I haven't looked to check that. The standard connector on these was what's known as an OSX Regards Nigel GM8PZR In a message dated 06/08/2013 10:25:27 GMT Daylight Time, ma...@non-stop.com.au writes: Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL # B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LIST IB E-230 ___ 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] Generate 1 PPS signal on serial port
Having a Linux/FreeBSD PC synchronized using NTP/chrony, what would be the best way of generating an output 1 PPS signal on a (hardware) serial port ? I haven't tried it. On Linux, /drivers/pps/generators/Kconfig (from kernel-devel or kernel sources) says: # PPS generators configuration # comment PPS generators support config PPS_GENERATOR_PARPORT tristate Parallel port PPS signal generator depends on PARPORT BROKEN help If you say yes here you get support for a PPS signal generator which utilizes STROBE pin of a parallel port to send PPS signals. It uses parport abstraction layer and hrtimers to precisely control the signal. Documentation/pps/pps.txt (from kernel-doc) has a section on that. Thanks, I'll check the documentation. ___ 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] Generate 1 PPS signal on serial port
Marki the smart search engine came back with: Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Pulse-Per-Second (PPS) Signal Interfacing Hardware: http://www.vk2hmc.net/blog/?p=583 If using Linux you need kernel version 2.6.39.4 or version 3 kernel as the PPS interface is now included in the kernel. Unless of course, low latency and jitter is not an issue for you ;) You can use either parallel or serial PPS. For windows see http://www.davehart.net/ for binaries. David Taylor pretty much covers it here: http://www.satsignal.eu/ntp/NTP-on-Windows-Vista.html Thanks, but I need it the other way: the PC itself should generate the 1 PPS signal without an external reference, except the network connection to NTP servers. It's more of a software problem. ___ 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] Generate 1 PPS signal on serial port
I am not really sure what you are trying to do either.. If you are trying to tee the output of a GPS, make a Y cable and connect TxD from GPS and DCD to each end (as PPS and NMEA are broadcast or one way if you like) once the receiver has been configured. You will have timenuts having strokes if you try and do it in software! However if you are hell bent on generating PPS in software somehow (please let me know you plan? - curious) Use http://www.curioustech.net/xport.html Been around for years and its pretty good and free to boot. Or am I still looking at your problem from the wrong end? Personally, I am moving my NTP server to the parallel port shortly. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eugen Sent: Tuesday, 6 August 2013 10:32 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Generate 1 PPS signal on serial port Marki the smart search engine came back with: Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Pulse-Per-Second (PPS) Signal Interfacing Hardware: http://www.vk2hmc.net/blog/?p=583 If using Linux you need kernel version 2.6.39.4 or version 3 kernel as the PPS interface is now included in the kernel. Unless of course, low latency and jitter is not an issue for you ;) You can use either parallel or serial PPS. For windows see http://www.davehart.net/ for binaries. David Taylor pretty much covers it here: http://www.satsignal.eu/ntp/NTP-on-Windows-Vista.html Thanks, but I need it the other way: the PC itself should generate the 1 PPS signal without an external reference, except the network connection to NTP servers. It's more of a software problem. ___ 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] Generate 1 PPS signal on serial port
On Tue, Aug 6, 2013 at 4:07 PM, Mark C. Stephens ma...@non-stop.com.auwrote: However if you are hell bent on generating PPS in software somehow (please let me know you plan? - curious) FWIW: Over in the hobby-CNC world where it is common to use the parallel port for driving machine tools (mills, lathes, 3d printers) pulses with good timing are output by LinuxCNC which sits on top of a real-time kernel (RTAI, Xenomai, or RT-Preempt). With a well-behaving bios/cpu/motherboard combination it is possible to achieve around 10-20 us maximum jitter - in good cases down to 5 us. The same program run on a non-realtime kernel will easily show 3-5 milliseconds or more of jitter. This is relative to a clock that the real-time kernel uses for internal timing - I am not sure if that clock can be NTP-disciplined. Anders ___ 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] Generate 1 PPS signal on serial port
On Tue, Aug 6, 2013 at 5:31 AM, Eugen eu...@lavabit.com wrote: Thanks, but I need it the other way: the PC itself should generate the 1 PPS signal without an external reference, except the network connection to NTP servers. It's more of a software problem. The current Linux kernel has a PPS GENERATOR. See pps_gen_parport Put WHY would you need this? The documentation for pps_gen_parport suggests only using it for crude synchronization of sevel computers but NTP would in every case work better for that purpose. But for whatever reason Linux does PPS in both directions Be warned that any software PPS gignal will not be great, expect a few microseconds or error Chris Albertson Redondo Beach, California ___ 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] Generate 1 PPS signal on serial port
On Tue, 6 Aug 2013 13:07:28 + Mark C. Stephens ma...@non-stop.com.au wrote: I am not really sure what you are trying to do either.. If you are trying to tee the output of a GPS, make a Y cable and connect TxD from GPS and DCD to each end (as PPS and NMEA are broadcast or one way if you like) once the receiver has been configured. You will have timenuts having strokes if you try and do it in software! However if you are hell bent on generating PPS in software somehow (please let me know you plan? - curious) Use http://www.curioustech.net/xport.html Been around for years and its pretty good and free to boot. Or am I still looking at your problem from the wrong end? Personally, I am moving my NTP server to the parallel port shortly. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eugen Sent: Tuesday, 6 August 2013 10:32 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Generate 1 PPS signal on serial port Marki the smart search engine came back with: Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Pulse-Per-Second (PPS) Signal Interfacing Hardware: http://www.vk2hmc.net/blog/?p=583 If using Linux you need kernel version 2.6.39.4 or version 3 kernel as the PPS interface is now included in the kernel. Unless of course, low latency and jitter is not an issue for you ;) You can use either parallel or serial PPS. For windows see http://www.davehart.net/ for binaries. David Taylor pretty much covers it here: http://www.satsignal.eu/ntp/NTP-on-Windows-Vista.html Thanks, but I need it the other way: the PC itself should generate the 1 PPS signal without an external reference, except the network connection to NTP servers. It's more of a software problem. ___ 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. No, I don't use a GPS or other synchronization hardware. The PC uses only network communication with NTP, and the PC itself should output an 1 PPS signal on a port serial / parallel. I want to analyze the 1 PPS signal generated by the PC and the synchronization process or to compare two 1 PPS signals generated by different computers. ___ 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] Generate 1 PPS signal on serial port
Hello, On 06.08.2013 17:25, Chris Albertson wrote: The current Linux kernel has a PPS GENERATOR. See pps_gen_parport Put WHY would you need this? The documentation for pps_gen_parport suggests only using it for crude synchronization of sevel computers but NTP would in every case work better for that purpose. But for whatever reason Linux does PPS in both directions Be warned that any software PPS gignal will not be great, expect a few microseconds or error There are applications for that... I had to do that some time ago, since I was required to send a PPS signal aligned to UTC, and a time-stamp of this PPS signal using MIL-1553 (surely this is familiar to some people in the list). The time was the UTC time at the computer (well, in this case an embedded one, ntp sync'd through LAN). Since at that time (not that long ago) there was not a pps generator available in the linux kernel, I developed a small kernel module to drive an ouput pin. It worked nicely enough, with a few microseconds of error - completely tolerable in that application. Regards, Javier ___ 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] motorola GPS antenna connector
Motorola UT/GT units have the MCX type antenna connector, then they adopted the MMCX on the M12 series. On Tue, Aug 6, 2013 at 11:24 AM, Mark C. Stephens ma...@non-stop.com.au wrote: Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ 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] SITime oscillators
SITime just got some press for their temperature insensitive mems oscillators. I went to the web site and saw some interesting parts with pretty ambitious claims. Specifically better than Quartz. http://www.sitime.com/index.php http://www.sitime.com/products/datasheets/sit8208/SiT8208-datasheet.pdf They look too good to be true. However the phase noise plot stops at 1 KHz. There is another that stops at 100 Hz elsewhere on the site. Does anyone have real experience with the technology? Demian Martin PDS ___ 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] SITime oscillators
SITime just got some press for their temperature insensitive mems oscillators. I went to the web site and saw some interesting parts with pretty ambitious claims. Specifically better than Quartz. http://www.sitime.com/index.php http://www.sitime.com/products/datasheets/sit8208/SiT8208-datasheet.pdf They look too good to be true. However the phase noise plot stops at 1 KHz. There is another that stops at 100 Hz elsewhere on the site. Does anyone have real experience with the technology? Not yet. I hope we will be able to buy few of them soon, if the price will be reasonable. However, there was a good introductory presentation of SiTime founder Aaron Partridge two weeks ago at IFCS-EFTF conference, describing lots of their MEMS' internals. Basically, the fine frequency tuning and temperature independence is all done using frac-N PLL, implemented completely within ordinary non-MEMS CMOS chip. So, the MEMS osc output is not directly led out. The MEMS is there, as far as I got it, to maintain long-term stability. Regards, Marek ___ 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] SITime oscillators
Demian, On 08/06/2013 06:45 PM, Demian Martin wrote: SITime just got some press for their temperature insensitive mems oscillators. I went to the web site and saw some interesting parts with pretty ambitious claims. Specifically better than Quartz. http://www.sitime.com/index.php http://www.sitime.com/products/datasheets/sit8208/SiT8208-datasheet.pdf They look too good to be true. However the phase noise plot stops at 1 KHz. There is another that stops at 100 Hz elsewhere on the site. Does anyone have real experience with the technology? Close-in phase-noise is interesting, or should I say lively. There are applications where these gives a run for the money, and a nice complement in the arsenal, but for good close-in noise you need real crystals. 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] SITime oscillators
On Tue, 6 Aug 2013 18:54:41 +0200 (CEST) Marek Peca ma...@duch.cz wrote: However, there was a good introductory presentation of SiTime founder Aaron Partridge two weeks ago at IFCS-EFTF conference, describing lots of their MEMS' internals. Basically, the fine frequency tuning and temperature independence is all done using frac-N PLL, implemented completely within ordinary non-MEMS CMOS chip. So, the MEMS osc output is not directly led out. The MEMS is there, as far as I got it, to maintain long-term stability. Yes, and that pretty much sums it up as well: The MEMS oscillators are for applications where you need good long term stability, can live with some temperature dependence (although i must say the no-tempco parts from SiTime are pretty impressive*) and don't care much about phase noise. The biggest effect on the phase noise comes from the frac-N synthesiser that is present in all parts. It generates a lot of spikes in the spectrum that can be pretty bad for radio applications. That is probably also the main reason why the phase noise plots stop at 1kHz: they don't want to show those messy parts. I guess the main applications for those MEMS parts are low footprint, low power uC devices that need a precise frequency but care little about superior phase noise. But then, current quartz oscillators still beat them at power consumption. One main advantage of those MEMS is that you can get odd frequencies pretty quick, as it just means to reprogramm the PLL and you're done. But then, Epson (and for sure others as well) had similar devices based on quartz for ages. Oh, and i would take the long term aging numbers with a grain of salt. The company has been around for roughly 10 years and according to wikipedia released their first production oscillator in 2006. Attila Kinali * They managed to build a MEMS oscillator with IIRC 30ppm temperature dependence, prior to temperature compensation, and over the whole temperature range. -- 1.) Write everything down. 2.) Reduce to the essential. 3.) Stop and question. -- The Habits of Highly Boring People, Chris Sauve ___ 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] SDR Radio Opinion- Next Question
On 8/6/2013 5:12 AM, Chris Albertson wrote: /It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio.Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd./ When I developed Winrad and my other SDR programs, a few years ago, I examined which were the tools available to a serious developer. My conclusion was that under Windows you could find professional tools, geared towards professional developments. What was available under Linux were little more than toys, meant for the hobbyists and the tinkerers. For example, at the time I was unable to find under Linux a development environment with the features and the power of the Embarcadero Rad Studio, which is what I use. This made me to choose Windows as my main platform. 73 Alberto I2PHD ___ 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] Generate 1 PPS signal on serial port
I want to analyze the 1 PPS signal generated by the PC and the synchronization process or to compare two 1 PPS signals generated by different computers. OK, but that just kicks the question further down the road. WHY would you want to compare two PPS signals? It is easy to do as Linux now has a PPS generator built-in. There is nothing to do but configure it. Expect the PPs to have a random 2 uSec or more jitter. It could be much worse. I think the PPS generation uses timer interrupts. The timer advances in uSec ticks and then there is some latency so expect and error in the range of a 'handful of uSec. -- Chris Albertson Redondo Beach, California ___ 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] SDR Radio Opinion- Next Question
Yes, I'm writing this on an iMac. I'm a long time BSD Unix user going back to about 1980. Now, FINALLY we can say the UNIX and Linux are the most commonly used OSes in the wold as one of those runs on most phones. Linux is in Androids and a unix varient is on iPhones and Macs I remember going to a talk by Bill Gates, this was in the pre-Windows ears when his main product was MS-DOS. He said that he would make DOS more and more unix-like as PC hardware grew in power. At that time he did not understand what an OS was and they UNIX was just the shell, and worked like DOS. It was was an amusing speak he was completely ignorant about OS design. But he was the exec not the engineer so he did not have to know. Still Had Windows not surprised them Gates would have done have Apple (and Sun and man others) did and simply sold a re-branded UNIX. What much better off we'd all have been On Tue, Aug 6, 2013 at 12:43 AM, Mark C. Stephens ma...@non-stop.com.auwrote: Hi Chris, The Mac OS X user base is also growing rapidly, with many preferring the X desktop to Winders. And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't like OS X.. It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio. Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd. --marki ___ 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. -- Chris Albertson Redondo Beach, California ___ 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] SDR Radio Opinion- Next Question
Have you ever looked at the unit put out by Ariel Rocholl called the RF Explorer? (link - http://micro.arocholl.com/) I bought one of these units and although they do not have everything ( I would love to have different demods on it), it has been an impressive unit, and inexpensive. I believe as Ariel gets more people interested in the handheld spectrum analyzer concept,he will be building better units with more capabilities. He has the spurs and birdies and other noise makers in any of these type of units, but he knows where they are and have taken them out ( mostly) in firmware. I bought one of the wideband units and even though the standalone units does not look very impressive, the Windows software make it into a very nice inexpensive and quite accurate handheld spectrum analyzer. I am not associated with Ariel, but he is approachable if you wish to talk to him ( I believe he is in Spain). I got mine from China at Seedstudio and other than one minor battery issue that they resolved I am very happy with it. Let me know if there is anything I could let you know if the online data does not tell you enough. Thanks, Jerry Chafee J. Forster j...@quikus.com wrote: OK. Thanks everybody. Can you please reccomend a make/model? I'd like something like: 75 to 1300 MHz USB Ability to function as a crude SA. Not crawling w/ birdies or aliasing issues. Will run on Win XP. Demod selecttable for all modes at all frequencies. In a package, rather than a loose PCB. $150 Prefer: SMA rather than RCA or F Receiver and SW from same vendor. Suggestions, please. Thanks, -John === ___ 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] SDR Radio Opinion- Next Question
Take a look at http://en.wikipedia.org/wiki/Xenix Microsoft DID sell a re-branded Unix. On Tue, Aug 6, 2013 at 2:34 PM, Chris Albertson albertson.ch...@gmail.comwrote: Yes, I'm writing this on an iMac. I'm a long time BSD Unix user going back to about 1980. Now, FINALLY we can say the UNIX and Linux are the most commonly used OSes in the wold as one of those runs on most phones. Linux is in Androids and a unix varient is on iPhones and Macs I remember going to a talk by Bill Gates, this was in the pre-Windows ears when his main product was MS-DOS. He said that he would make DOS more and more unix-like as PC hardware grew in power. At that time he did not understand what an OS was and they UNIX was just the shell, and worked like DOS. It was was an amusing speak he was completely ignorant about OS design. But he was the exec not the engineer so he did not have to know. Still Had Windows not surprised them Gates would have done have Apple (and Sun and man others) did and simply sold a re-branded UNIX. What much better off we'd all have been On Tue, Aug 6, 2013 at 12:43 AM, Mark C. Stephens ma...@non-stop.com.au wrote: Hi Chris, The Mac OS X user base is also growing rapidly, with many preferring the X desktop to Winders. And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't like OS X.. It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio. Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd. ___ 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] SDR Radio Opinion- Next Question
Yes. I rememebr. I used one back when it was new. Getting back to the OP, what he was looking for. And SDR has two parts, a hardware front end and some software. Those two parts can be mostly independent. I'd suggest finding one or two or so SDR software system you like then collecting hardware. Make sure the software is free and open source. You don't want a closed source .exe file. That is like buying a radio with the cassis welded shut or potted in epoxy. On Tue, Aug 6, 2013 at 4:06 PM, Orin Eman orin.e...@gmail.com wrote: Take a look at http://en.wikipedia.org/wiki/Xenix Microsoft DID sell a re-branded Unix. On Tue, Aug 6, 2013 at 2:34 PM, Chris Albertson albertson.ch...@gmail.comwrote: Yes, I'm writing this on an iMac. I'm a long time BSD Unix user going back to about 1980. Now, FINALLY we can say the UNIX and Linux are the most commonly used OSes in the wold as one of those runs on most phones. Linux is in Androids and a unix varient is on iPhones and Macs I remember going to a talk by Bill Gates, this was in the pre-Windows ears when his main product was MS-DOS. He said that he would make DOS more and more unix-like as PC hardware grew in power. At that time he did not understand what an OS was and they UNIX was just the shell, and worked like DOS. It was was an amusing speak he was completely ignorant about OS design. But he was the exec not the engineer so he did not have to know. Still Had Windows not surprised them Gates would have done have Apple (and Sun and man others) did and simply sold a re-branded UNIX. What much better off we'd all have been On Tue, Aug 6, 2013 at 12:43 AM, Mark C. Stephens ma...@non-stop.com.au wrote: Hi Chris, The Mac OS X user base is also growing rapidly, with many preferring the X desktop to Winders. And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't like OS X.. It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio. Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd. ___ 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. -- Chris Albertson Redondo Beach, California ___ 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] SDR Radio Opinion- Next Question
That is true, Windows is great for Mr. Joe average, because of the ease of use, and because of the ease of use and user-base size, a lot of software has been developed for it. I use windows for a most tasks including software development and just to be compatible to everyone else. As you say, a lot of software is written for winders including professional programming IDE's etc. However, if Windows gets a virus or something breaks or corrupt, 9 times out of 10 you are screwed and have to reinstall. The great thing about Linux (Unix), there is always 101 ways to do the same thing, If something breaks, you can work around it until its fixed. Heck you can reinstall the GUI if you feel like it :) Each day I am drawn back to using Unix CLI and I have to say, I learn something new each day. As OS X roots are in a mature, robust OS (BSD), it is getting a great reputation as a robust but easy to use operating system. In fact, my next door neighbour has kicked his Windows out and bought a MAC! He is 82, and learning a new computing environment was not a trivial task for him and his wife. But he says he has never looked back. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Alberto di Bene Sent: Wednesday, 7 August 2013 7:04 AM To: time-nuts@febo.com Subject: Re: [time-nuts] SDR Radio Opinion- Next Question On 8/6/2013 5:12 AM, Chris Albertson wrote: /It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio.Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd./ When I developed Winrad and my other SDR programs, a few years ago, I examined which were the tools available to a serious developer. My conclusion was that under Windows you could find professional tools, geared towards professional developments. What was available under Linux were little more than toys, meant for the hobbyists and the tinkerers. For example, at the time I was unable to find under Linux a development environment with the features and the power of the Embarcadero Rad Studio, which is what I use. This made me to choose Windows as my main platform. 73 Alberto I2PHD ___ 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] SDR Radio Opinion- Next Question
Funny that those toys that come with Linux pretty much run the entire Internet and every Android phone and almost every TV set top box and firewall/router. But in the end as a developer you either follow the market and the dollar or you do what your boss pays you to do. What tools are needed anyway but a few terminal windows and a text editor? Anyways the hot market now if you are chasing the dollar and customers is phone apps. That is what users want and that is who the companies are hiring. I'd really like to see SDR move to phones and tablets. It would make them even more portable. These phone now days have quad core 32-bit CPUs and GPUs that can be tapped for compting power for thing like FFTs and other DSP. As for development tools, there is no shortage. We also need some new ideas. So muct SDR software tries to emulate a 1980's radio. On Tue, Aug 6, 2013 at 6:27 PM, Mark C. Stephens ma...@non-stop.com.auwrote: That is true, Windows is great for Mr. Joe average, because of the ease of use, and because of the ease of use and user-base size, a lot of software has been developed for it. I use windows for a most tasks including software development and just to be compatible to everyone else. As you say, a lot of software is written for winders including professional programming IDE's etc. However, if Windows gets a virus or something breaks or corrupt, 9 times out of 10 you are screwed and have to reinstall. The great thing about Linux (Unix), there is always 101 ways to do the same thing, If something breaks, you can work around it until its fixed. Heck you can reinstall the GUI if you feel like it :) Each day I am drawn back to using Unix CLI and I have to say, I learn something new each day. As OS X roots are in a mature, robust OS (BSD), it is getting a great reputation as a robust but easy to use operating system. In fact, my next door neighbour has kicked his Windows out and bought a MAC! He is 82, and learning a new computing environment was not a trivial task for him and his wife. But he says he has never looked back. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Alberto di Bene Sent: Wednesday, 7 August 2013 7:04 AM To: time-nuts@febo.com Subject: Re: [time-nuts] SDR Radio Opinion- Next Question On 8/6/2013 5:12 AM, Chris Albertson wrote: /It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio.Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd./ When I developed Winrad and my other SDR programs, a few years ago, I examined which were the tools available to a serious developer. My conclusion was that under Windows you could find professional tools, geared towards professional developments. What was available under Linux were little more than toys, meant for the hobbyists and the tinkerers. For example, at the time I was unable to find under Linux a development environment with the features and the power of the Embarcadero Rad Studio, which is what I use. This made me to choose Windows as my main platform. 73 Alberto I2PHD ___ 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. -- Chris Albertson Redondo Beach, California ___ 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] SDR Radio Opinion- Next Question
This thread does not belong on time-nuts. Please stop. /tvb http://www.leapsecond.com/time-nuts.htm ___ 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] Large Qty HP C-Beam Tubes available
On 9/22/2012 12:13 AM, Greg Burnett wrote: Hello Everyone, ...Apology for the long delay in getting out an update regarding availability of the late Chuck Norton's pull-out C-Beam tubes (in used, unknown condition). Allow me to introduce Harv Smith, who is storing the equipment in Pueblo, Colorado as a favor to Chuck's surviving family. Harv has graciously offered to handle the sales and disposition of the C-Beam tubes and equipment. Therefore please contact him directly at: Harv Smith baculitem...@aol.com mailto:baculitem...@aol.com My best, Greg What ever happened to this?? I tried to e mail him several times. Said I was on list? Don H ___ 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.
