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 mailing

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

. --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

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.cathodecorner.com

Re: [time-nuts] nubie querie

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] 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, Tucson, AZ http

[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.cathodecorner.com

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

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

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 unsubscribe, go to https

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

for the 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 list

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

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 unsubscribe, go to https

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

://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 instructions there.

Re: [time-nuts] HP 5245L Question

. 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 unsubscribe, go to https

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

to 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. -- --David

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

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

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. --David

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

, 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 ___ time-nuts mailing list -- time

Re: [time-nuts] Spread Spectrum Spam!

, 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-nuts@febo.com To unsubscribe, go to https://www.febo.com

Re: [time-nuts] Clock Project Help

://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://www.febo.com

Re: [time-nuts] Obscure terms

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] Obscure terms

/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] [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 mailing list -- time-nuts

Re: [time-nuts] 74AC112

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/listinfo/time

Re: [time-nuts] Method for comparing oscillators

://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=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/mailman

Re: [time-nuts] Ten minutes past ten

, 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.cathodecorner.com

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

with lots 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

. -- --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

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, go

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

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@febo.com

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

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 Forbes

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

Re: [time-nuts] Certichron

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-nuts mailing list -- time-nuts

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

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@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

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

. 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.com To unsubscribe, go to https://www.febo.com/cgi-bin

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

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/ ___ time-nuts mailing list

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 more

[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] 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 Dave,

Re: [time-nuts] Voltage standards

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 like being a drunkard on fine Scotch whisky without the buzz. -- --David Forbes, Tucson, AZ http

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

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! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

[time-nuts] Jeopardy questions

? 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 mailing list -- time-nuts@febo.com

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

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. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts

[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, AZ http

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 compensated for.

Re: [time-nuts] Testing frequency using NTP

of magnitude better. Curiously, the icworks.com domain name is now available for purchase. -- --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

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, he's

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

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. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] CE Mark

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

[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. -- --David Forbes

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. That

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 soldering this SMT

[time-nuts] HP 113BR manual scanned

to 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-nuts

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

, 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/ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe

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

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's get it put up there where it will do lots of people some good! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

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

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 follow the instructions there.

Re: [time-nuts] PCB design questions

on the circuit requirements. There is absolutely no reason to have a separate layer for digital ground versus analog ground. One ground plane is plenty. Just segregate the noisy stuff from the sensitive stuff by putting them in different parts of the board. Cheers Dave Partridge -- --David Forbes

Re: [time-nuts] Valpey - VF154

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. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

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

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-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] Low cost logic analyzer

. -- --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

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

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 mailing list -- time-nuts@febo.com

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

CLRFDigit1 later... MOVLW HALF10 -- change HALF10 to 0x2 SUBWF Digit1, W RRF OutByte, 1 -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts

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

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://www.cathodecorner.com

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

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-nuts mailing list -- time-nuts

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

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 transmitting! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time

[time-nuts] Little 3-bayonet connector

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 the actual connectors. -- --David Forbes, Tucson, AZ http

Re: [time-nuts] Modulation on Rb sources

there's too much real work going on. -- --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] Watches

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

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.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo

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

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 digital problems! --David Forbes

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

. 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 interval counter anyways. Have fun! -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

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

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 mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin

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

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@febo.com To unsubscribe

[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

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

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 other benefits too. --David Forbes Tucson, AZ

Re: [time-nuts] Long GPS antenna

-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

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, Tucson, AZ http

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

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

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 need a

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

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?

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 won't

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

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 list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] HP 113BR manual copies

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

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

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://www.cathodecorner.com

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

, 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 http://www.cathodecorner.com

[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 on

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 need;

Re: [time-nuts] OT: RoHS crap

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 Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time

Re: [time-nuts] Wikipedia Dual-modulus prescaler item

At 3:46 PM + 12/21/06, Peter Vince wrote: David Forbes recently mentioned the Wikipedia item on dual-modulus prescalers: http://en.wikipedia.org/wiki/Dual-modulus_prescaler I have looked at that article, and either my brain has slipped out of gear, or there are some errors in both

[time-nuts] Obtaining 32768Hz from 10 MHz

A discussion of driving computer clocks from accurate sources recently came up. While it's true that PCs generally use the CPU clock or the baud rate clock for the timekeeping function, the observation was made that it might be nice to run a standard RTC that uses a 32768 Hz crystal from a 10

Re: [time-nuts] Locking gunn diode

complicated piece of hardware by the time you're done. It's not a task for the timid. -- --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] Failure mode in GPS receivers

it directly to the antenna, netting a 6 dB signal increase, to see if it gets happier. Failing that, is there any diagnostic information presented by any of your receivers that would tell if the signal strength to them had changed recently? -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] HP 10811-60105 OCXO

from a 5245. It has a rectifier, video amp and decade counter on it so the general function is pretty obvious. I hope you mean a 5345, since the 5245 was a much older transistorized instrument that had its own OCXO built into the frame, not as a removable module. -- --David Forbes, Tucson, AZ

Re: [time-nuts] Surplus Guidelines, was: Rubidium Standard

At 10:30 PM -0600 12/10/06, Scott Newell wrote: At 02:39 PM 12/10/2006 -0700, David Forbes wrote: Jason, I'm no expert at these devices, but here's what I've learned in the last year: The Ball/Efratom FRK is the oldest design that's commonly available. Where does the M-100 fall, relative

Re: [time-nuts] HP5065 Frequency processing part II

would not be factory selected. -- --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] Re Certified Time Nut Certificate

be disciplined to GPS if desired by varying its supply voltage and/or rotating it relative to gravity, which activities would certainly qualify one as certifiable. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ ___ time-nuts mailing list time-nuts

Re: [time-nuts] Help with an hp 8642a

it work with what's there already. I once designed some equipment for the phone company - one of their special requirements was convection cooling. After a few cooling fan wild-goose-chases, I can appreciate that. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com

Re: [time-nuts] Rubidium Cesium video

! But it's perfectly harmless in a clock, right? Right? -- --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

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