Re: [time-nuts] The USCG really wants to bury Loran-C

Poul-Henning Kamp wrote: http://news.bbc.co.uk/2/hi/americas/8653754.stm At least they didn't hit the building with the tower! I like how the BBC helpfully offers several more demolition videos at the end. --David Forbes ___ time-nuts ma

Re: [time-nuts] What time is it anyway?

asked the Navy. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] OT - New Mexico travel and the VLA

he planet. --David Forbes ___ 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] nubie querie

g task and succeeding. I work on radio telescopes, so I know how big a task that is. --David Forbes ___ 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] 5370A vs 5370B

out failure. So your 25C office can use a much quieter fan. Our telescope at 3500m altitude, on the other hand, needs all the fan noise it can get since the thin air is only 50% as effective at cooling as sea-level air is. -- --David Forbes, Tucson, AZ http://www.ca

Re: [time-nuts] nubie querie

number of state variables. So the cesium clock is one of the few gadgets whose future behavior can be predicted to any reasonable extent. --David Forbes ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailma

Re: [time-nuts] nubie querie

At 10:25 AM -0800 3/4/10, Brooke Clarke wrote: Hi Tom: In the last slide you show a sand timer. Do you have accuracy data for it? Wouldn't that depend on the consistency with which the human flips the hour glass? They don't flip themselves, you know. -- --David Forbes, Tucso

Re: [time-nuts] Rb Oscillator - rather fundamental question

e-bias to Gnd and Vcc from the input pin of the MCU, are usually sufficient. --David Forbes ___ 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] Quasi-OT: The nixie watch is again available

. http://www.nixiewatch.com/ And no, it doesn't have a rubidium oscillator. But you can adjust the crystal oscillator frequency (test point provided) and obsess over its inadequacies as a precision time source. And the Woz wears one. -- --David Forbes, Tucson, AZ http://www.cathodecorne

Re: [time-nuts] Low temperature coefficient capacitors for DMTD

th the PPS capacitors. --David Forbes ___ 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] Sidereal time

IG time from a GPSDO directly. The time accuracy needed is ~1 millisecond. LST is calculated using the canonical 10 digit number cited previously. --David Forbes, the HHSMT, Arizona ___ time-nuts mailing list -- time-nuts@febo.com To unsu

Re: [time-nuts] HP 5245L Question

gled way. Nixies are still viable display elements, and they can be driven nicely with the TD62084 or the similar TI SN75468. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscr

Re: [time-nuts] HP 5245L counter circa 1967 humor

http://www.decadecounter.com/vta/articleview.php?item=639 -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instruc

Re: [time-nuts] Digital Clock kit - no Integrated circuits!

cade. My twin brother built a clock out of some old Beckman hollow-state counters... http://www.selectric.org/tubeclock/index.html -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscri

Re: [time-nuts] HP 5245L counter circa 1967 humor

idea. I'll look for those plugins. I actually remember thinking about getting the video amplifier many years ago, but that was in the year 6 BE (before ebay). -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing

Re: [time-nuts] HP 5245L counter circa 1967 humor

get more sensitivity out of my 5245L so that it would respond more reliably to the tiny 32kHz signal on my nixie wristwatch oscillator. I'll be tuning up a lot of them in the coming weeks. I have a parts unit on hand (burned-up oven) and an original manual. Both come in handy. -- --

Re: [time-nuts] are any time-nuts also random-nuts?

character set on his arm. ASCII is on the other arm.) --David Forbes, Tucson AZ ___ 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] Datum Exactime 9390-6000 question

ugh to upgrade via a free PROM from Symmetricom; the other was too old for them to be interested in upgrading (other than selling us a new one, of course!). So we're researching replacement possibilities and limping along with software that substitutes the correct year into the data string

Re: [time-nuts] OT: Wanted desperately - LS-120 disk drive

ight now tho' ... D. David, I typed LS-160 into Google (the USA version), and got lots of hits for currently available drives, both new and refurbished. They sell for USD60-100. Are they unavailable in the UK? --David Forbes, Tucson AZ USA _

Re: [time-nuts] Spread Spectrum Spam!

he FM broadcast band, on the other hand, are defined by field strength. That's the only cheat-proof way to specify emitter power testing. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-n

Re: [time-nuts] Clock Project Help

http://www.tayloredge.com/ And there are many more out there. I'm not selling nixie clocks myself any more, though. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://ww

Re: [time-nuts] Obscure terms

of ton. (A 1/2 ton truck can carry 1.5 tons if you're in a low-income area.) --David Forbes, Inchland ___ 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] Obscure terms

, and I'm mighty glad of that. --David Forbes, Tucson, Free Republic of Arizona ___ 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] [OT] Help needed with HP 16700A

often had the "standard" 50 pin telephone style connector (the 50 pin version of the "Centronics" printer connector). Then there were both 50 and 68 pin high density connectors, which were smaller. --David Forbes ___ time-nuts maili

Re: [time-nuts] Ten minutes past ten

ust 1, 2009. A talking watch says, "Ten-ten AM ..." as the hands show 10:10. How far back does that tradition go? Bill Hawkins Bill, The time of 8:18 is also used. They are both used simply because the hands are symmetrical on the face. -- --David Forbes, Tucson, AZ http://www.ca

Re: [time-nuts] Method for comparing oscillators

://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-4223-5- ND Dave M -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mai

Re: [time-nuts] 74AC112

ca II show stock in the USA. It costs less than a dollar. This is a Harris (formerly RCA) product line that was purchased by TI. --David Forbes ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/lis

Re: [time-nuts] HP 3458A ISOLATOR DTACK err @ pwr up

ts of free time. --David Forbes ___ 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] HP5370A self test fault characteristics and diagnosis

works. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Z3805 initial behaviour after power up

fting and therefore be useless for the test. Nevertheless, 25 years later we expect the whiz-bang engineers at HP to have thought of the problem and solved it. --David Forbes, Tucson ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,

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

orked as well as any model can, given the clumpiness of failures. P.5-13 gives the temperature failure rate multiplier for ECL chips: 25C 0.10 45C 0.27 55C 0.42 65C 0.63 75C 0.94 85C 1.4 95C 1.9 So my off-the-cuff guess of failures doubling for every 10C rise is not too wrong. --David F

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

weight and maintenance reasons. Given that many of these ECL chips are no longer made, keeping them cool for long life is of utmost importance. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@f

Re: [time-nuts] Consumables or the Time Nut

?? Thanks Stan, W1LEFN41srCape Cod Stan, I did this recently. The ink is soluble in, of all things, water! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Certichron

r, so it's a good indicator of a website's time source.) So I don't have much faith in their service, if they can't even get their website's clock right. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-

Re: [time-nuts] OT: 10 MHz data capture, help

tion using their drivers to continuously log the digitized data to a file as binary or ASCII values. Here's a 30MSPS card: http://www.advantech.com/products/PCI-1714U/mod_GF-HQHV.aspx --David Forbes, Tucson ___ time-nuts mailing list -- time-nuts@feb

Re: [time-nuts] PCB connector for a 10811A

ctor from Digikey might do the trick. EDC306150-ND single sided 15 pin .156" pitch EDC307300-ND double sided 2x15 pin .156" pitch -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo

Re: [time-nuts] Tektronix 603/604, looking for any documentation

xplore. > >Thanks in advance for any help about this. > >--ga German, I have a 603 manual at the office. I could mail it to you if you wanted to pay postage, or I could scan a few pages of interest. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ _

Re: [time-nuts] Never mind Thunderbolts...

Bruce Griffiths wrote: > > The setup is reasonably straight forward to duplicate. > However a pair of Helmholtz coils isnt optimum. > 3 pairs would be better as it may not be convenient/possible to align > the apparatus with the Earth's magnetic field, > > There are coil arrangements that produce

[time-nuts] Boatanchor docs: HP AC-4 counter module manual

second. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Any experienced HP 2804A thermometer users out there?

oducts/sensors.aspx?id=37 I used a National Instruments data acquisition system. The system was able to measure temperature changes down to about 0.01C with averaging. You would need to calibrate the sensors against a standard if you want accurate temperatures. They recommend an ice bath for that wor

Re: [time-nuts] beryllium oxide

d.sei...@comcast.net wrote: > Since we're on the subject, what does BeO typically look like when it's used > as a washer, heatsink, etc. I ask because I tend to keep everything and I > modify things all the time. Is there any way besides being painted that it > could pass as Al? > > -Dave D

Re: [time-nuts] beryllium oxide

t safe even to have a job making sure it's safe! The exposure prevention method is to never breathe the dust. That means keeping it wet or encapsulated at all times. A single particle of beryllium in the right place at the right time can be enough to cause problems. So yeah, don't mes

Re: [time-nuts] Voltage standards

it, although I don't personally handle the stuff. We also have a few obsolete receiver Dewars lying around... one of them could be retrofitted to hold a cryogenic standard if we felt like it. But there's the "rent" of regularly buying that LHe to keep the standard cold. Kinda l

Re: [time-nuts] Time-zones and World time..

ime (eg. 12:00 is when the >sun is at its highest). That caused major problems for the >railroads. > >-Chuck Harris Chuck, I don't think you meant to say sidereal time, which is based the stars, not the sun. There are 366.25 or so days in a sidereal year! --

[time-nuts] Jeopardy questions

e there in a year? It is indeed amusing how the word "year" so muddies this simple parameter of celestial mechanics, by inserting politics into the question. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mai

Re: [time-nuts] How many seconds in a year?

ut alas they do not. So there is no way to build a clock today that is guaranteed to count seconds correctly in future years, short of having it receive leap second announcements twice a year and adjust its timekeeping accordingly. -- --Da

[time-nuts] Sound and time

At 12:16 PM + 10/11/08, Poul-Henning Kamp wrote: > >As former sound technician... I used to do that stuff too, being the bass player/sound guy in a cheesy bar band. Loads of fun! Any more time nuts with sound reinforcement experience? -- --David Forbes, Tucson, A

Re: [time-nuts] AC Connector On HP 5061B

WB6BNQ wrote: > Tom Van Baak wrote: > >>> On the DA you will want to ensure all your output cables are of >>> identical length as this will ensure that all signals are in phase at >>> the timebase input(s). It's a small thing really a fraction of a >>> picosecond but it's there and easily compen

Re: [time-nuts] Testing frequency using NTP

to see the effects of the PLL. A sound card that uses a directly divided crystal oscillator, if such things exist, should be several orders of magnitude better. Curiously, the icworks.com domain name is now available for purchase. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/

Re: [time-nuts] Temp control of LPRO

WB6BNQ wrote: > Hi Neville, > > In all seriousness, I thought the Rubidium physics package is heated for > reasons. Now that you are heat sinking it, what has happened to the current > draw > for the whole unit ? Or am I misunderstanding something ? > > BillWB6BNQ > He's not cooling it,

Re: [time-nuts] Nixie - tube clock - 16 Digit Readout !

GHT " nixie clock kit , >whatever that really is --> > Tim, There is a Yahoo group called NeoNixie that is devoted to the art of creating nixie clocks. A few of its members - the ones who want their clocks to be somewhat accurate - are also members of this group. -- --

Re: [time-nuts] CE Mark

rectly to end customers in the EU, do NOT need to CE mark my American made products. -- David Forbes, Tucson AZ, Estados Unidos Americanos ___ 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] Leap Second quirk, Another hanging bridge

Hal Murray wrote: > I've got a couple of GPS units that use the SiRF chips feeding NTP. I was > looking for low cost units for time keeping. They don't work very well. The > time offset of the NMEA message wanders/jitters by about 100 ms. I can > easily correct for a constant offset, but I c

[time-nuts] Seriously vintage time nut

Here's a fellow using a BIG tuning fork frequency standard in 1929 for some industrial data acquisition system using 16mm movie film as the medium... http://www.shorpy.com/node/4218?size=_original Then feel free to look at all the photos on the site - they're fascinating. -- --Da

Re: [time-nuts] Test equipment-level phase noise PLLs

Matt Ettus wrote: > In looking into extremely low phase noise synthesizers, I have come > across the new HMC700LP4 chip from hittite, which seems to have the > best figure of merit I have found, -227 dBm/Hz. That gives you > -107dBc/Hz at 20 kHz offset at 6 GHz according to the datasheets. > > Th

Re: [time-nuts] Frequency divider design critique request

Jim Lux wrote: > At 10:41 AM 7/11/2008, David C. Partridge wrote: >> M >> All, >> >> CPLD - wassat? OK, OK I have some idea, but that's about all I know. >> Anyway these are probably BGA stuff which I couldn't hope to hand solder >> anyway - it's enough of a stretch for me to think of hand solderi

[time-nuts] HP 113BR manual scanned

scan if anyone's interested in this ancient stuff. Let me know. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] Rb references for audiophiles?

g with their transmitting/receiving circuitry, for introducing jitter. Not once did they contemplate putting the oscillator next to the DAC where you might say it rightfully belongs. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ ti

Re: [time-nuts] HP 105 manual finally scanned

than the shipping charge. It's built like a tank, and is definitely worth hanging on to! I run the scanner with VueScan by Hamrick Software. It does an excellent job of controlling the older SCSI scanners. I have an old Adaptec SCSI to PCI interface card in a computer with a new motherboard

Re: [time-nuts] HP 105 manual finally scanned

>lacking the first two pages, in December 2007. > >regards > >Nigel >GM8PZR Hmm... If I'd realized he had scanned the thing, I probably wouldn't have bothered. They seem to be equivalent in quality. But it's still not on the Agilent website, so let&#x

[time-nuts] HP 105 manual finally scanned

-manual librarians, perhaps you could pass it along to them. It's been a rather glaring omission from their collection for a long time now. And I'll be happy to take it down from my website if such things as manuals for obsolete electronic items shouldn't be exposed to the w

Re: [time-nuts] EFRATOM FRK Connector ??

e. I think you can still download their catalog online. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follo

Re: [time-nuts] PCB design questions

isy stuff from the sensitive stuff by putting them in different parts of the board. >Cheers >Dave Partridge -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Valpey - VF154

Something made out of some resistors and capacitors will produce a decent result. You might want to add an amplifier after that. And don't expect good frequency accuracy or phase noise, since these are meant to clock a microprocessor, not provide an accurate frequency reference.

Re: [time-nuts] Zeta Labs X76 Multiplier 7600 MHz Output Model 5856-01

.6 GHz output power should go up quickly with a smaller increase in input power. The trouble is, the ideal operating power is probably about 4 dB less than the power required to blow out the diode. Good luck with it! --David Forbes ___ time-

Re: [time-nuts] Low cost logic analyzer

it is designed to solve your problem. Since it knows about I2C bus, it should be easy to set up the triggering for your case. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Power monitoring

Hal Murray wrote: > My power went out the other day. That reminded me that I've always been > slightly curious about that area. Our telescope suffers from flaky mountain power, so we have to do this sort of thing. The problem is sending a message that the power went out to the university camp

Re: [time-nuts] 5 MHZ PIC PPS Divider?

e change is indeed non-trivial if you want to make 100 KHz from 5 MHz. However, if you don't need the first stage to be the correct 100 KHz, it's a lot easier. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts maili

Re: [time-nuts] 5 MHZ PIC PPS Divider?

git1, W BTFSC STATUS, Zero CLRFDigit1 later... MOVLW HALF10 <-- change HALF10 to 0x2 SUBWF Digit1, W RRF OutByte, 1 -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ __

Re: [time-nuts] Joining Antenna Cables (Again)

t. But you can make those. I have purchased the corresponding connectors from Digikey and used a short length of RG188 cable to make an adapter from whatever to whatever else. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-

[time-nuts] How best to compute local time from GPS

p DST, so I have no experience in this matter.) 5. Considering that the source code is being provided with the clock, are any of you fine folks interested in getting one of these gadgets to see what you can do with it? I await your reasoned replies. -- --David Forbes, Tucson, AZ http://w

Re: [time-nuts] need recomendation for a portable 10mhz reference oscilator

> The E1938A oven has exceptionally high thermal gain so variations in the > OCXO frequency due to ambient temperature changes may well be insignificant. > Before proposing drastic/dangerous measures David should attempt to > measure the E1938A frequency variations as a function if temperature to

Re: [time-nuts] need recomendation for a portable 10mhz reference oscilator

eries. The result of all this is that the oscillator's temperature and power supply voltage would be nearly constant. Those are conducive to stability. The only unstable part of the environment is physical motion. Just sit still when you're transmitti

[time-nuts] Little 3-bayonet connector

ephone made in the 1970s. The only submini bayonet connectors I find mentioned with Google are the Kings KM which is like the BSM which Tektronix used, and Google gives a photograph. It has two bayonet pins. Unfortunately, if no one makes it anymore, data will be hard to find, much less t

Re: [time-nuts] Modulation on Rb sources

ur level is supposed to be, but I could drag my FRS-N into the lab and measure it if you're interested. Just not this month since there's too much real work going on. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-n

Re: [time-nuts] Watches

sideline if the quantity and price are sufficient to make it worthwhile. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Chronometer contest sponsored by IEEE Spectrum

ailable crystals and resistors. That way, it's an engineering challenge instead of a procurement challenge, since IEEE is about engineering. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list -- time-nuts@febo

[time-nuts] OT- Fixing product by attaching the scope probe

my boss always made me find the source of the trouble. We did ship some boards with rows of 150pF SMT capacitors on register select inputs of an IDT bit-slice ALU due to a die shrink that made the internal registers get corrupted with fast incoming edges. Talk about analog solutions to digit

Re: [time-nuts] New Time nut FRK-H repair questions --- IT Works!!

hook up a very slow PLL to the EFC input to keep it locked, assuming that your GPS signal is reliable. There are designs for such PLLS, for example Brooks Shera's, on the web. Of course, the PLL is a time interval counter in addition to a servo loop, so you'd be building a time int

Re: [time-nuts] Fury Interface Board: How about TI OPA277?

ulation with an LM128 or such. PSPICE only has the >LM128 so I am just testing this out. > >-George The REF19x series is very good at this sort of job. Also 8 pins. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mai

Re: [time-nuts] Danish Question

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Scott Newell wrote: > > So, who's going to submit this urban legend to Snopes for them to track down? > > It already is there... http://www.snopes.com/college/exam/barometer.asp __

Re: [time-nuts] M100.pdf

Thanks for publishing that manual on your site. I recommend removing the spaces from the file name - they play havoc with web browsers and command-line OSes. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list --

[time-nuts] Solving the right problem

Greg Burnett wrote: > The question about the relationship between SPDIF (and AES/EBU) clock jitter > and audio DAC fidelity is of interest to those of us (who can hear these > differences). For example, might there be a second order effect (with a > high sensitivity coefficient) regarding the e

Re: [time-nuts] time-nuts, frequency counters

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY CHazlitt wrote: > > So, here is my question, do Rubidium standards drift that much over a period > of years to where they have to be brought back on frequency? If so, what is > tuned on the Rubidium to do so, C-field? Yes,

Re: [time-nuts] new paper on Allan Variance errors

inct advantage of working at a university - our IP addresses are all in the societies' and journal companies' databases as having site licenses, so institutional papers are freely downloadable. I won't say that it makes up for the distinctly lower pay scale, but there are oth

Re: [time-nuts] Long GPS antenna

an amplified antenna, and the antenna was placed on top of a 5-story building with the receiver in the basement. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] OT: Audiophoolery

ear 800 watt amplifier and some really big speaker cables to sound half-decent. These speakers, driven by a 100W consumer Kenwood amp and/or 16 gauge zip cord, sounded rather thin. Of course, the solution was 12 gauge zip cord that cost 15 cents per foot. -- --David Forbes, Tuc

Re: [time-nuts] Most accurate clock on your wrist

Neon John wrote: > I've been waiting with baited breath for a GPS watch. NOT a NAVAID on > the wrist but a simple GPS-synced watch. It would seem to me that > making a miniature GPS receiver would be much easier than making a > WWVB receiver. > > Unfortunately that watch ain't it. Gad, they nee

Re: [time-nuts] "Antelope Audio Launches The Isochrone 10M Affordable Atomic Clocking Device"

s ovenized crystal will get you to .1% accuracy easily, with lower jitter than a phase-locked rubidium oscillator. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Most accurate clock on your wrist

s programmed with open-source code, so you can mess with the programming if you like. --David Forbes http://www.nixiewatch.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Source for DC power connector on HP 5061 and 5065?

5.47 each, hundreds in stock. It's the non-mil-spec version but they are compatible. I just verified compatibility on the 6 pin version, which for some reason we used a lot of on our 12 meter radio telescope. --David Forbes ___ time-nuts mailing

Re: [time-nuts] Source for DC power connector on HP 5061 and 5065?

John Ackermann N8UR wrote: > Subject line says it all... I'm looking for the DC input power connector > used on the HP 5065A Rb and 5061A Cs standards. Finding the > manufacturer/part number would be great; a source would even be better > (a source giving them away for free would be best, but I wo

Re: [time-nuts] Standards for units

7 frames/second that cinematographers have grown to love to hate. There's a volume of the RCA Review that came out in 1953 that is all about the NTSC color system development process. It's fascinating reading. Available at your local university library. -- --David Forbes, Tucso

Re: [time-nuts] Standards for units

tlworld.com/r.howitt/Calculator.htm -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] HP's typewriter 'n' stuff

her's Selectric Typewriter Museum that was used as the "expert source" in the 2004 Bush memo scandal. All this typewriter font stuff is blindingly obvious if you look closely at the characters typed on the page. -- --David Forbes, Tucson, AZ http://w

[time-nuts] HP 113BR manual copies

nterested. It's quite the manual, describing some clockmaking stuff you don't usually get from HP. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Low Drop Out Voltage Regulator

t 27V when the AC power is good, otherwise at 24V. For a non-super-critical application, this should be sufficient. The frequency error as a result of the voltage change is documented in the Rb source datasheet, I would hope. -- --David Forbes, Tucson, AZ ht

[time-nuts] Beckman WWV receiver

Mike Fahmie wrote: > 2006 FMT results have appeared at: > > http://www.arrl.org/w1aw/fmt/2006/2006-fmt-results.html > > -Mike- Mike, Hi. That's quite a rack of boat anchors you have there. Do you have a manual for the Beckman WWV receiver? I have one of these receivers, but it's not working o

Re: [time-nuts] Odd request

Tom Van Baak (mobile) wrote: > > But one easy way to do it today is start with a $5 standard > quartz clock display. 1) Either run a precise synthesized > 32 kHz signal into it (replacing the xtal), or drive the little > bipolar stepper yourself. > > A 50 millisecond +1.5 VDC pulse is all you nee

Re: [time-nuts] OT: RoHS crap

ther question, but it appears to drive our economy judging from the amount of advertising space devoted to the gadgets. I stil haven't tossed my 2 year old broken DVD player that needs a new motor worth a dollar but unavailable due to planned obsolescence. Shame on you, Toshiba! -- --David F

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