Re: [time-nuts] Logging the grid frequency....

2013-02-22 Thread Chris Albertson
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] lightweight webserver for, e.g., NTP widget

2013-02-11 Thread Chris Albertson
of huge multi-core servers with gigabytes of RAM but it also scales down to small scale and is not a CPU hog and nearly disappears when it is idle. And as said, it is easy to configure because everyone who knows anything about the web knows Apache so help is easy to find -- Chris Albertson

Re: [time-nuts] Embedded NTP server ideas and feature requests

2013-02-10 Thread Chris Albertson
provide 12 Watts of power -- 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] Possibly off topic - Jitter on Ethernet over power adapters

2013-02-10 Thread Chris Albertson
. Any comments appreciated. Thanks. Rob ___ 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

Re: [time-nuts] Embedded NTP server ideas and feature requests

2013-02-10 Thread Chris Albertson
anything and especially that that might do obvious things like plug it into a standard POE switch. 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

Re: [time-nuts] Embedded NTP server ideas and feature requests

2013-02-10 Thread Chris Albertson
I think PoE is a great thing, because it allows you to get rid of all those wallwarts.. More importantly than simply getting rid of them is that with PoE you can place your Ethernet device in a location where there is no place to plug-in a wall wart. -- Chris Albertson Redondo Beach

Re: [time-nuts] Possibly off topic - Jitter on Ethernet over power adapters

2013-02-10 Thread Chris Albertson
of the transmission. It is unlikely to add much noise. The PoE device only puts a DC bias on the twisted pair. The data signal is differential. It is transformer couple to is pretty much is immune to common mode noise. So even iif the DC bias was noisy I don't thing it would matter. -- Chris

Re: [time-nuts] Embedded NTP server ideas and feature requests

2013-02-09 Thread Chris Albertson
, -- m. tharp ___ 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

Re: [time-nuts] question for expert time guys

2013-02-05 Thread Chris Albertson
. The cell phone industry gave up on triangulation when GPS because cheap and easy -- 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

Re: [time-nuts] question for expert time guys

2013-02-04 Thread Chris Albertson
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

Re: [time-nuts] GPS at 60,000 feet

2013-01-31 Thread Chris Albertson
are under the orbit of the satellites. The company I used to work for placed GPS on some low orbit spacecraft, so say roughly 200 miles up and 18,000 mph but I'd guess most hand held units would not work in those conditions Chris Albertson Redondo Beach, California

Re: [time-nuts] Low noise power supplies?

2013-01-30 Thread Chris Albertson
lab power supply etc. For once the best is also cheap: Batteries. But not all batteries are the same. You want one with low internal resistance, so a lead acid flooded battery will be the best. Chris Albertson Redondo Beach, California ___ time-nuts

Re: [time-nuts] Low noise power supplies?

2013-01-30 Thread Chris Albertson
On Wed, Jan 30, 2013 at 9:05 PM, Jim Lux jim...@earthlink.net wrote: On 1/30/13 8:28 PM, Chris Albertson wrote: For once the best is also cheap: Batteries. But not all batteries are the same. You want one with low internal resistance, so a lead acid flooded battery will be the best

Re: [time-nuts] OT, looking for a good science forum

2013-01-26 Thread Chris Albertson
because of advances like battery powered LED illumination. This kind of microscope is pretty easy to find compared to the other. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] OT, looking for a good science forum

2013-01-26 Thread Chris Albertson
school level labs they use cheaper 400x scopes and just look at larger stuff. 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

Re: [time-nuts] OT, looking for a good science forum

2013-01-26 Thread Chris Albertson
. Another calibration point might be the boiling point of water. I don't need to design this now, it was an example equestion -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] Thunderbolt Monitor

2013-01-23 Thread Chris Albertson
/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] Better gps antennas than a Symmetricom 58532A

2013-01-23 Thread Chris Albertson
that matches 75 ohm rather than 50. -- These are my opinions. 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. -- Chris

Re: [time-nuts] Least costly 10 MHz reference solution

2013-01-23 Thread Chris Albertson
-- 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

Re: [time-nuts] Thunderbolt Monitor

2013-01-23 Thread Chris Albertson
RAM I suspect you would get about 5% of it into a MSP430. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Chris Albertson Sent: Wednesday, January 23, 2013 11:44 AM To: Major L. McGee III; Discussion of precise time

Re: [time-nuts] Thunderbolt Monitor

2013-01-23 Thread Chris Albertson
have one spare. Cheers, James Harrison On 23/01/2013 19:55, Chris Albertson wrote: You can't compare the size of a Windows binary to a uP RAM. If you look inside the .exe file you see that 90% of it is dealing with the Windows OS. The actual computations are very, very small and don't

Re: [time-nuts] Better gps antennas than a Symmetricom 58532A

2013-01-22 Thread Chris Albertson
. -- 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

Re: [time-nuts] Better gps antennas than a Symmetricom 58532A

2013-01-21 Thread Chris Albertson
-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

Re: [time-nuts] Better gps antennas than a Symmetricom 58532A

2013-01-21 Thread Chris Albertson
to deal with cable loss is to move the GPS receiver. Maybe place it in the attic right under where the antenna cable comes through the roof? -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] Better gps antennas than a Symmetricom 58532A

2013-01-21 Thread Chris Albertson
has I used a 1 pipe with a pipe flange screwed to the top end. I mounted the antenna to the flange using four stainless steel bolts and ran the coax cable inside the pipe. The pipe perforates the roof so the cable has a very short and direct run. -- Chris Albertson Redondo Beach, California

Re: [time-nuts] OT - USB to LPT Adapter - Does it exist?

2013-01-11 Thread Chris Albertson
think the best solution is to finally retire that old parallel port chip programmer and replace it with something more modern. You might have paid a lot for it but today $35 will get you something with a USB cnetion and then you don't need the printer port. Chris Albertson Redondo Beach

Re: [time-nuts] OT - USB to LPT Adapter - Does it exist?

2013-01-11 Thread Chris Albertson
. If it is a PIC or something like that, just buy a USB capable programmer. -- 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

Re: [time-nuts] Interval Timer Recommendation

2013-01-08 Thread Chris Albertson
for a one second pulse (over one period)? -- 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] Article discussing various free SPICE and other circuit simulators.

2013-01-08 Thread Chris Albertson
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] matlab, python, etc.

2013-01-07 Thread Chris Albertson
/** mailman/listinfo/time-nutshttps://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

Re: [time-nuts] single board PCs

2013-01-06 Thread Chris Albertson
/time-nutshttps://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

Re: [time-nuts] 10 MHz - 16 MHz clock multiplier

2013-01-04 Thread Chris Albertson
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] An embedded NTP server

2013-01-02 Thread Chris Albertson
that can run an OS and the NTP reverence implementation. ARM (and others) can do that. -- 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

Re: [time-nuts] An embedded NTP server

2013-01-02 Thread Chris Albertson
___ 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

Re: [time-nuts] An embedded NTP server

2012-12-28 Thread Chris Albertson
and SPARC is ideal for this as it can run BSD Unix. -- 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] clock-block any need ?

2012-12-27 Thread Chris Albertson
better time keeping than is needed, in that case you will need some kind of specialized clock hardware. Most nuts, I think would like to have a microsecond level wall clock even if it were pointless. -- Chris Albertson Redondo Beach, California

Re: [time-nuts] New to Time Synching hardware - needing some advice

2012-12-27 Thread Chris Albertson
from somewhere. Roy ___ 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

Re: [time-nuts] New to Time Synching hardware - needing some advice

2012-12-27 Thread Chris Albertson
the longer your hold-over requirement. 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] clock-block any need ?

2012-12-27 Thread Chris Albertson
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] New to Time Synching hardware - needing some advice

2012-12-27 Thread Chris Albertson
...@kinali.ch wrote: On Thu, 27 Dec 2012 10:19:46 -0800 Chris Albertson albertson.ch...@gmail.com wrote: Yes you could us something like one of the low-cost rubidium oscilators to supply a pulse per second to Linux NTP and it would work for some time before the error was as large as 10 mS. One

Re: [time-nuts] clock-block any need ?

2012-12-27 Thread Chris Albertson
. ___ 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

Re: [time-nuts] An embedded NTP server

2012-12-26 Thread Chris Albertson
of making what you want from what you can get at a profit. ___ 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

Re: [time-nuts] An embedded NTP server

2012-12-25 Thread Chris Albertson
___ 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

Re: [time-nuts] Brooks Shera

2012-12-21 Thread Chris Albertson
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] NMEA Software

2012-12-20 Thread Chris Albertson
/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] NMEA Software

2012-12-20 Thread Chris Albertson
. Motorola's format is well docmented in free PDF files you can download -- 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

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

2012-12-17 Thread Chris Albertson
__**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson

Re: [time-nuts] GPS DO Alternatives

2012-12-09 Thread Chris Albertson
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

Re: [time-nuts] GPS DO Alternatives

2012-12-08 Thread Chris Albertson
for a counter that has 8 digits you are doing well enough. If you can get to 10 digital it is pretty good -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin

Re: [time-nuts] GPS DO Alternatives

2012-12-08 Thread Chris Albertson
be done with off the shelf parts and no wiring at all. Problem solved? I suspect not…. Bob On Dec 8, 2012, at 1:59 PM, Chris Albertson albertson.ch...@gmail.com wrote: On Sat, Dec 8, 2012 at 9:30 AM, johncr...@aol.com wrote: Hello all - People talk about good deals

Re: [time-nuts] Open source

2012-12-07 Thread Chris Albertson
to the public built with GPL tools be made available for no more than the cost of distribution ie you can charge for the cost of the optical disk and postage but no more. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts

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

2012-12-07 Thread Chris Albertson
://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

Re: [time-nuts] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
but that will take more smarts. Bert Kehren 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] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
that doesn't require designing a circuit and building it. -- 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

Re: [time-nuts] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
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

Re: [time-nuts] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
don't worry about if it is 1E-12 or 1E-15. Just make it transparent and easy to understand and modify. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin

Re: [time-nuts] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
-- 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

Re: [time-nuts] Open source GPSDO

2012-12-06 Thread Chris Albertson
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] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
setting back to the TXCO. That is why my first post was to ask What is the simplest phase defector that can work? I think you only need a one-bit counter. A flip-flop will do that. The FF is a classic phase detector used in many PLL -- Chris Albertson Redondo Beach, California

Re: [time-nuts] GPSDO Alternatives

2012-12-06 Thread Chris Albertson
to build -- 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] GPSDO Alternatives

2012-12-04 Thread Chris Albertson
-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

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

2012-12-04 Thread Chris Albertson
/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

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

2012-12-03 Thread Chris Albertson
On Mon, Dec 3, 2012 at 4:51 PM, Scott McGrath scmcgr...@gmail.com wrote: We really need to think more about the secure distribution of time products Is NTP not secure. I know it can be secured but I think in practice people disable passwords. -- Chris Albertson Redondo Beach

Re: [time-nuts] Using a frequency synthesizer replacement for motherboard oscillator

2012-11-30 Thread Chris Albertson
the clock twice and check for a deta time of more than a few nanoseconds. Then if you read the data between those to clock samples you will know the clock was acuratly sampled. Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time

Re: [time-nuts] Surge Arresters

2012-11-27 Thread Chris Albertson
. (A common electrical box works for this and is cheap. As long as you don't like in Orlando FL you should be fine -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi

Re: [time-nuts] GPS antenna in attic?

2012-11-26 Thread Chris Albertson
? They have a bit of a hook on the top to reduce water penetration. ___ 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

Re: [time-nuts] GPS antenna in attic?

2012-11-26 Thread Chris Albertson
which works well with the Thunderbolt and has such a threaded bottom? The typical antenna has a flat bottom that is bolted to some kind of mounting adaptor. Perhaps the thing with the British treads will un-bolt. THen you can buy a pipe flange at any hardware store. -- Chris Albertson Redondo

Re: [time-nuts] GPS antenna in attic?

2012-11-25 Thread Chris Albertson
will have a first class setup. You run the coax down the pipe. The timing antennas are pointed on top so snow falls off Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi

Re: [time-nuts] GPS Modules Indoors

2012-11-20 Thread Chris Albertson
___ 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

Re: [time-nuts] FE-5680A firmware dump (at last!)

2012-11-08 Thread Chris Albertson
you want you can rectify that problem yourself without having to say somebody should But really, for an 8051 you can resolve most ambiguities by hand -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Is it sensible to update every few seconds from NTP server?

2012-11-07 Thread Chris Albertson
...@onetel.netwrote: Someone at my radio club uses some mode of operation where accurate time is required. He said the standard Windoze clock does not keep sufficiently accurate, so he has software which updates from an NTP server every 4 seconds or so. -- Chris Albertson Redondo Beach, California

Re: [time-nuts] Rubidium as radio reference

2012-11-04 Thread Chris Albertson
still need access to some kind of standard like from GPS so you can calibrate the Rb. Your best bet would be to build a GPSDO that runs directly at the desired 12.8Mhz. Most off the shelf GPSDOs run at 10Mhz so this is a good reason to DIY. -- Chris Albertson Redondo Beach, California

Re: [time-nuts] For my whole life timezones have been weird

2012-11-03 Thread Chris Albertson
shell and he was running Microsoft. 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] Distribution amps and slew rate

2012-11-03 Thread Chris Albertson
/** mailman/listinfo/time-nutshttps://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

Re: [time-nuts] Simple NTP server based on a Raspberry Pi

2012-10-30 Thread Chris Albertson
to zero clients and whatever else is running. You never want the load average to go over 0.5 in steady state usage. So you onoy have a factor of five to go. Good enough for a small office but not for a public server. Chris Albertson Redondo Beach, California

Re: [time-nuts] Simple NTP server based on a Raspberry Pi

2012-10-30 Thread Chris Albertson
average is because I thought the Pi might make a good web and file server. Seems like it might. Those are services that also need to run 24x7 -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] Simple NTP server based on a Raspberry Pi

2012-10-29 Thread Chris Albertson
...@blueyonder.co.uk wrote: I've spent the last few days getting a very simple, low-power NTP server working on a Raspberry Pi. Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] Timing performance of servers

2012-10-25 Thread Chris Albertson
going to run. Anyone think I can get by with anything cheaper than a symmetricom 58532a antenna? I can probably get one (used) for less than $50 on ebay, but I'd really prefer to source something more entry-level for closer to $5 or $10 if possible. Any suggestions? Chris Albertson Redondo Beach

Re: [time-nuts] Timing performance of servers

2012-10-25 Thread Chris Albertson
or withing 10 degrees of it looks pretty much the same. I don't want a huge tree of building due south of the antenna. But for timing all you really need is to see most of the sky. It depends on if you want it to work or work as well as it can. Chris Albertson Redondo Beach, California

Re: [time-nuts] Are serial port headers standardized?

2012-10-20 Thread Chris Albertson
of it working. Those flat cable make it hard to be wrong. Worst case is you buy some jumper cable with make pines on one and and female on the other and patch it together. It willl look ugly but still work Chris Albertson Redondo Beach, California

Re: [time-nuts] Followup (still want a GPS-type NTP refclock)

2012-10-18 Thread Chris Albertson
On Wed, Oct 17, 2012 at 4:48 PM, Sarah White kuze...@gmail.com wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 10/17/2012 6:04 PM, Chris Albertson wrote: ((...snip...)) -- 1 Indoor antennas can work. It depands on the details. Hopefully the skylight looks to the south. BTW

Re: [time-nuts] Followup (still want a GPS-type NTP refclock)

2012-10-18 Thread Chris Albertson
units, SiRF is very small and maybe lower cost. 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] RasberryPi, timing and GPS receivers

2012-10-17 Thread Chris Albertson
requirement?You say you don't want overkill So I assume you would be happy with 50 millisecond error? That is 1/20th second or do you need microseconds? No one can know if your plan is reasonable without knowing the goal. Chris Albertson Redondo Beach, California

Re: [time-nuts] Followup (still want a GPS-type NTP refclock)

2012-10-17 Thread Chris Albertson
worried about cost buy an older Oncore. The new m12m is only slightly better then the older m12+T that sells on eBay for $35. The two are nearly identical. (See item # 290656401551) then see item # 270881742870 for an antenna You'd be just under $100 if you went this route. -- Chris

Re: [time-nuts] Followup (still want a GPS-type NTP refclock)

2012-10-17 Thread Chris Albertson
. It is a part that requires some knowlege to asemble into usable product. 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

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Chris Albertson
LLady Heather inside a virtual Windows under VMware. Not heat or fan noise. -- 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

Re: [time-nuts] RasberryPi, timing and GPS receivers

2012-10-16 Thread Chris Albertson
-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] multi time zone display for wall mounting?

2012-10-09 Thread Chris Albertson
for an off the shelf commercial time display (or combination of displays).. ___ 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

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Chris Albertson
. The satellites are in 12 hour orbits. Everything repeats every 12 hours. But the sun is on a 24 hr. period and if you did two 12 hour tests you don't want to do one at night and one in day. So start each test at the same time of day let it run for 12+ hours. Chris Albertson Redondo Beach

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

2012-10-09 Thread Chris Albertson
it is reading from a local file. On Tue, Oct 9, 2012 at 10:44 AM, cdel...@juno.com wrote: I'm switching to a new counter that outputs at 57600 Baud (9 digits). Is there a version of Basic I can use that would support that 57600 Baud -- Chris Albertson Redondo Beach, California

Re: [time-nuts] GPS Jammer

2012-10-03 Thread Chris Albertson
the way most GPS jammers are used. I'd call it self jamming where you jam your own receiver so other people will not know where you are. Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] OT question about liquid cooling

2012-10-03 Thread Chris Albertson
-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

Re: [time-nuts] RFX GPSDO - Anybody played with one of these?

2012-10-01 Thread Chris Albertson
On Mon, Oct 1, 2012 at 9:27 AM, Don Latham d...@montana.com wrote: A single unit would set you back $465.00 and delivery would be in the region of 6 weeks. I Wonder what price the T-Bolts sold for new in single quantities. Maybe more than $465? Chris Albertson Redondo Beach, California

Re: [time-nuts] How are non-Trimble oscillators disciplined?

2012-09-30 Thread Chris Albertson
this is done for you in a low cost self contained unit. But you don't learn much that way, except how to connect cables. Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] George's GPS Antenna protection...

2012-09-28 Thread Chris Albertson
Picture of the messy work bench below! http://www.mrrace.com/TrimbleGPS/TestEquipment.jpg No way! Does not count if you can actually SEE the workbench surface. Even the screw drivers are lined up neatly. -- Chris Albertson Redondo Beach, California

Re: [time-nuts] Best GPSDO

2012-09-28 Thread Chris Albertson
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] Up And Running

2012-09-28 Thread Chris Albertson
of a 1 iron pipe the cable goes down the pipe. 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] Best GPSDO

2012-09-28 Thread Chris Albertson
need to be to test real-world receivers? -- 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] Up And Running

2012-09-28 Thread Chris Albertson
the street. https://www.dropbox.com/s/2qec0lf48occeom/DSC_3134%20copy.jpg 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

Re: [time-nuts] Lady Heather on a Laptop

2012-09-27 Thread Chris Albertson
. The entire setup uses about 5 or 6 watts of power If I want to see the LH display I can log into the linux system for any other computer and have the screen exported. Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com

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