Re: [time-nuts] 5070B once more.... (actually 5370A fans)

-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

Re: [time-nuts] 5070B once more.... (actually 5370A fans)

of them have rated temperatures of only 85°C and much of the discount electrocrap uses 55°C grade. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] 5070B once more.... (actually 5370A fans)

employee who was involved, HP paid for tourist class tickets for the personel, but was given the entire front 1st class row VIP treatment, including access to 110VAC power. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956

Re: [time-nuts] 5070B once more.... (actually 5370A fans)

suck. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

Re: [time-nuts] 5070B once more.... (actually electrolytics)

In message 980094.92979...@web27105.mail.ukl.yahoo.com, Robert Atkinson write s: I'm not sure if the espionage story is true. It is: http://www.theregister.co.uk/2003/02/06/stolen_formula_torpedos_big_brand/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [time-nuts] FreeBSD, NetBSD, or Minix-III?

[...] I dont' think it buys you anything, except trouble. It is a perfect example of what I said earlier: people cannot grasp that time do not come in parcels... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] Picket fence ADEV measurement on 5370 counters

-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

Re: [time-nuts] 5070B once more....

output of the 5370, because it is giving you a periodic series of time interval (aka phase difference) measurements. ... as long as you remember to use TI+/- mode. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD

Re: [time-nuts] 5070B once more....

you get a small positive time interval reading every second. Right, but with NTP servers that's not really an option. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [time-nuts] Thunderbolt - any negatives ?

has a small 12V UPS board, havn't tried it, but a friend did and it works fine. I've run my timing stuff off a battery-backed power-supply normally used for firealarms. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] FE-5680A heat sink

-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time

Re: [time-nuts] FE-5680A heat sink

:-) Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] FE-5680A thermal management

In message be50c3a72eba61449c804b2c8b4ae38101ebb...@neptune.rakon.net, Murra y Greenman writes: With the FE-5680A I had the opportunity to study things in more detail. The PRS10 manual has some good info. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP

Re: [time-nuts] Thunderbolt stability and ambient temperature

and sensible insulation, if you rip out the compressor, you can use the cooling circuit to do active temperature control if you want. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [time-nuts] Thunderbolt stability and ambient temperature

in their temperature controlled lab so the temperature can stabilize. At this point they may start to wonder how they can verify the pt100 temperature sensor they put in the middle of it all actually works when the temperature never changes... Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Thunderbolt stability and ambient temperature

not stay as reflective. By the time you add this layer to the construction I mentioned, you care about the difference between 0.98 and 0.99. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3

Re: [time-nuts] Thunderbolt stability and ambient temperature

impedance as thermal inertia and you get a much better picture... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Thunderbolt stability and ambient temperature

: The thermal mass need not be solid blocks of metal, regular ceramic bricks or tiles work fine. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

Re: [time-nuts] Thunderbolt stability and ambient temperature

of bottled water will still be full up when the child graduates from college, and has kids of his own. Unless UPS or DHL decides to leave your package stranded on a loading dock in -20°C for a couple of days. In the lab I *might* use water, for shipping I never would. -- Poul-Henning Kamp | UNIX

Re: [time-nuts] Thunderbolt stability and ambient temperature

wiggling about, and when you change the modes of freedom for the atoms, they may have to wiggle harder. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] Thunderbolt stability and ambient temperature

and voltage references. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Thunderbolt stability and ambient temperature

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing

Re: [time-nuts] Time/freq from digital TV

, they are very keen on traceability. On the transmission side they don't care much because the network delay these days can approach tens of seconds... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [time-nuts] Lifetime of glass containers

molten glass has been poured out through a narrow slot and subseqently rolled further, like dough for a flatcakes can be recognized by having both sides having an opaque layer. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956

Re: [time-nuts] Z3815A pinout

plausible that either HP/Agilent produced it to customers mechanical specs or that Customer got a subassembly and did the mechanics themselves. Logos and serials indicate the former, the cables indicate be either. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP

Re: [time-nuts] Alternative WWVB Spectracom solution

-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time

Re: [time-nuts] HP and other equipment failure

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

Re: [time-nuts] HP and other equipment failure

a spare tube... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

Re: [time-nuts] OT: Re: HP and other equipment failure

get back to time-nuttery ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Measuring speed of light or reproducing a metre

like that... However, the meter you get is not long enough, due to the lack of vacuum and excess of copper atoms. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what

Re: [time-nuts] OT Prototype Boards

In message caf_se-av85uzwvkp2zeil10dcdeohroj0wne1d-13vawcwt...@mail.gmail.com , Robert Darlington writes: Machinists know that 1 inch is exactly 2.54cm or 25.4mm. It's a definition, not a coincidence. The crucial word in that statement being a :-) -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Frequency subtraction with D-flip flops

the same thing. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time

Re: [time-nuts] The auction site?

barrages of spam. I think now that it has become totally mainstream, that is not an issue anymore. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] Lead acid battery noise levels

to verify this. I did find some comments on an audiophile forum that indicated that gel cell batteries are not known for low noise levels (: Don't even think about advice from audiohomoeøpathicists, the 99.9% which isn't downright bullshit is incorrect. -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] How dangerous if a Rb lamp broken?

was just speculating. You would. He did. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Interesting (meaningless?) measurement.

of the same magnitude. For additional fun: Play with the phase-angle setting on the generator :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

Re: [time-nuts] GPS Spoofing

. The ones you can't spoof are Loran-C. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] GPS Spoofing

trust DoD to not play with GPS. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] GPS Spoofing

, maybe we should apply some modern signal-theory and design a new and even more robust VLF signal... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

Re: [time-nuts] GPS Spoofing

) and a loop-antenna about 5m in diameter. Do the math, It's not as easy as you think. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] GPS Spoofing

absolutely useless for navigating planes, cars and automobiles, as they drift tens of degrees per hour. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] Industrial control systems and IEEE 1588v2 time sync

? If you don't need microseconds, you don't need a magic switch, 1588 gets you well below 1msec on regular switches, provided you don't overload that network segment. Regular NTP can also get there, if you tweak the poll-rate down, but 1588 is a more robust protocol. -- Poul-Henning Kamp

Re: [time-nuts] Advantages of differential oscillator structures?

In message 39433ff7-ba50-4e0c-9f11-992aedcd5...@rtty.us, Bob Camp writes: A couple of observations: But you have to admit: 5) Getting into low ppm's at 1 microampere is kind of impressive... There's nothing about phase-noise, so I suspect that's where the trade-off is ? -- Poul-Henning Kamp

Re: [time-nuts] PTPv2 grandmaster with a Z3805A?

that's needed without being marketed as a precision timing NIC? Price. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] ***SPAM*** Cartoon :)

In message 20130822082311.30224406...@ip-64-139-1-69.sjc.megapath.net, Hal Mu rray writes: Is anybody collecting time-nuts cartoons? http://www.gocomics.com/pearlsbeforeswine/ You mean like this: http://faculty.ucc.edu/business-greenbaum/images/NanosecZits.jpg -- Poul-Henning Kamp

Re: [time-nuts] ***SPAM*** Re: ***SPAM*** Cartoon :)

? The strip is simply called Zits I'm surprised how anybody can live on this planet and not know it :-) http://zitscomics.com/ I don't belive their on-line archive stretches that far back... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD

Re: [time-nuts] de Witte's Experiment

. If there is such an effect, why wouldn't it be trivial to measure on a transatlantic fiber ? There is very little temperature variation at the bottom of the atlantic... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] de Witte's Experiment

-picosecond time-transfer over a 200km fiber in AZ: http://tf.boulder.nist.gov/general/pdf/1807.pdf Wouldn't you expect them to have noticed if a Nobel-prize were in reach ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD

Re: [time-nuts] Getting a 5370A tomorrow - How do i test it works

that it's working ok. Start out by running the tests described in the manual. If it passes those, it's fundamentally OK. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [time-nuts] de Witte's Experiment

:-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

Re: [time-nuts] B.V.A. 8600 for sale

In message 572a741b-0213-4f1c-ba59-c2d396a03...@aol.com, Said Jackson writes: These are about $11,000 or so new if I am not mistaken. Depends what options it has... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

[time-nuts] sub-minute time-precision in court-case

the opinion mention if the timestamps were taken on the same clock or if the two clocks were synchronized. Best was a volunteer fireman, but I still find the seventeen seconds slightly incredible. The seventeen seconds are somewhat material to the ruling, but not a decisive factor. -- Poul-Henning Kamp

Re: [time-nuts] sub-minute time-precision in court-case

911 equipment. And yes, there can be quite a delay from you press send until the SS7-message-gateway sees the text-message. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [time-nuts] sub-minute time-precision in court-case

In message 727DE1FE9A784A598E49129B80D2C63C@pc52, Tom Van Baak writes: filename=5071A-xyz.jpg As far as I can see, two of the tubes have their axis parallel to the X-coordinate ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956

Re: [time-nuts] sub-minute time-precision in court-case

-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time

Re: [time-nuts] HP 4193A 4815A probe compatibility?

but steer the amplification of a cell-phone tower, you need to build a two-dimensional calibration table to get usable precision. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [time-nuts] Mains frequency

your house-hold appliances by their distortion patterns :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Crude Survey Technique

(or similar servce) but you need to get coordinates figured out (not trivial!) I would raise a pole or other marker at one end (N or S), calculate when a suitable celestial object crosses your designated line and that to triangulate the opposite end. -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Crude Survey Technique

signal, and I dropped it from the project. If somebody wants a interesting little project, try taking that up again, and see if the 12h wiggles in the PPS signal can be reduced that way. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956

[time-nuts] ESO's historical RS Cs clock

Spotted this: http://www.eso.org/public/announcements/ann13092/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] Shortt Clock Recent Measurements

: www3.alcatel-lucent.com/bstj/vol11-1932/articles/bstj11-2-318.pdf -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Shortt Clock Recent Measurements

In message d82c3cbd5688ab036d49d2d32515a859.squir...@webmail.montana.com, Do n Latham writes: I think if I were to start designing, I'd use a quartz rod instead, I'd go for SiC, like they did for the optics bench in the GAIA satellite -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p

Re: [time-nuts] Shortt Clock Recent Measurements

In message 82901.1386754...@critter.freebsd.dk, Poul-Henning Kamp writes: In message d82c3cbd5688ab036d49d2d32515a859.squir...@webmail.montana.com, Do n Latham writes: I think if I were to start designing, I'd use a quartz rod instead, I'd go for SiC, like they did for the optics bench

Re: [time-nuts] Local Solar Time Clock

power. I don't know the WWVB signal well enough, but decoding DCF77 by mechanical means wouldn't be too hard. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can

Re: [time-nuts] Local Solar Time Clock

In message 52dc152f.6080...@rubidium.dyndns.org, Magnus Danielson writes: Here we would need to do MSF or DCF77, both would be severly challenging to do passively. Not decoding wise. Once you have a robust signal, it's easy... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p

Re: [time-nuts] Morion MV89A position

, if you request 4U rackspace for a cinderblock. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Morion MV89A position

and filled with dry sand will do much better than your alubox. Cat-litter doesn't work, it has too low mass and thermal conductivity, but sand can be bought ovendried and cleaned for various hobby and construction purposes. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [time-nuts] Morion MV89A position

. By the time there was sufficient capacitance there was way too much thermal resistance. I'm not too fond of sand either, but I found it way better than air for double-oven OCXOs. Keeping the box air-tight (and sand-tight!) is pretty important though. -- Poul-Henning Kamp | UNIX since Zilog

Re: [time-nuts] Morion MV89A position

not exist :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

Re: [time-nuts] Morion MV89A position

expect :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

Re: [time-nuts] Morion MV89A position

in the ground? In general burying things is much more trouble than it's worth. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] Morion MV89A position

panel on your battery ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

[time-nuts] LORAN-C Boat-Anchor

I have is based on the Intel 4004 - the worlds first microprocessor, but I have no idea what's inside the one on eBay. Interestingly, the ML 200 can lock on the 4-digit european GRIs but it is not much actual use to a timenut, it is mostly a boat-anchor... -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] strange behavior of 53230A or is the light on, but nobody in?

dead on? I don't get that at all. On all the HP kit I have, ref out is the frequency used by the instrument, so if you feed it an external reference, it is just a copy of that external reference. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP

Re: [time-nuts] Neutrinos not so fast? (defectove connector)

dissertation, being known as the idiot who made a fool of both CERN and SanGrasso in one go. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

Re: [time-nuts] Neutrinos not so fast? (defectove connector)

nanoseconds difference on a signal. It can add a signal where one was missing before, but it does not change the timing of a signal that already made it through by a consistent 60 nanoseconds. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956

Re: [time-nuts] Loran transmitters back on the air.

in the air and at ground. The latter sucks most, which is why you need detailed maps of local corrections. I wonder how much of a role the recent you could loose GPS to stupid politics experience has in this. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since

Re: [time-nuts] Questions about Austron 5000 Loran C receiver

the PDP/8 did. Otherwise: forget all about it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Questions about Austron 5000 Loran C receiver

transformer to attach your antenna. Here is a time-lapse gif with a nights worth of loran-C: http://phk.freebsd.dk/AducLoran/animation.gif Have fun... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since

Re: [time-nuts] Questions about Austron 5000 Loran C receiver

of their 2100's, I would appreciate it. My aim is to disassemble them and find out more about how these receivers actually work. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [time-nuts] Questions about Austron 5000 Loran C receiver

they are different name scheme both receivers are 2100F and look the same. Hmm, interesting. Youre r.G and r.107 look a lot like each other, and nothing much like my r.107 -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD

Re: [time-nuts] Questions about Austron 5000 Loran C receiver

. There may be enough to allow you to figure out how to put another computer on the 5000, but it would be a lot of work, no doubt about that. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [time-nuts] Austron 2000C Loran C Receiver

chains here. Yeah, I usually hear the Chayka too here in Denmark. Unfortunately the 8000 GRI of the eastern Chayka is extremely bad for S/N as pretty much any and all integral kHz CW stations do not average out like the do for 2, 3 or 4 digit GRis. -- Poul-Henning Kamp | UNIX since Zilog Zeus

Re: [time-nuts] Loran in the US

than LORAN-C. It's mentioned somewhere in the ILA's archives, probably early '80ies. The idea has been partially validated by DCF77's phase-coding. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3

Re: [time-nuts] Loran in the US

technology, with a data-channel so receivers don't have to have a hard coded list of all transmitters. That would make roll-out a matter not for governments, but for airports, harbours and other interested parties, like for instance DME. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p

Re: [time-nuts] Loran in the US

for precision timing and positioning [using that particular system, of course]? Well, that could be your own choice, you can tell your receiver which transmitters you trust. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [time-nuts] Loran in the US

, as you well know all our problems these days are there isn't enough God in the constitution or something. Thats why some people in the military is looking into a modern more lightweight version of Tactical Loran for use when GPS is jammed. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p

Re: [time-nuts] Loran in the US

of a problem. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts

[time-nuts] MicroLogic ML200 Loran-C

that it is based on an Intel 4004 microcomputer and after resocketing some ICs it seems to work better. If anybody has any information/manuals etc. for this beast, I'd love to get hold of a copy. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC

Re: [time-nuts] MicroLogic ML200 Loran-C

on highways, but neither contains any relevant details. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] Loran in the US

Has anybody asked them how good timefreq they're trying to deliver ? I would assume that they are aiming for a backup for GPS in telecom-GPSDO context. If so, frequency stability is priority number one and time is probably just better than 100msec or so -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] MicroLogic ML200 Loran-C

In message 2561.12.6.201.116.1331169308.squir...@popaccts.quikus.com, J. For ster writes: Last seen, the 4004 chips were much in demand (perhaps by gamers) And chip-collectors But they're not leaving that receiver as long as there is smoke in them. -- Poul-Henning Kamp | UNIX since

Re: [time-nuts] Loran in the US

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list

Re: [time-nuts] Loran in the US

surprised if LightSquared nuking GPS reliability doesn't have something to do with this. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [time-nuts] Three HP oldies

Format gif to preserve computer generated details like lines and text. PNG is also a good choice, both for pictures and for graphics. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [time-nuts] WWVB BPSK Receiver Project?

I've just used my hacked up rig. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [time-nuts] WWVB BPSK Receiver Project?

. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing

Re: [time-nuts] WWVB BPSK Receiver Project?

signals, once they have phase-code, are pretty good for frequency stabilization, you just need to use an averaging time of 24 hours. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [time-nuts] WWVB BPSK Receiver Project?

into a smaller chip. That's how I found out that the circular-buffer averaging comb-filter is a much better and stronger signal discriminator than almost anything else you can come up with, for frequency/phase reception. See for instance: http://phk.freebsd.dk/loran-c/CW/ -- Poul-Henning Kamp

Re: [time-nuts] WWVB BPSK Receiver Project? (fwd)

another USB profile or whatever. The ARM chip is plenty powerful to do pretty much anything you are to on its own once you give it the code to do so. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

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