Re: [time-nuts] How quartz crystals are (were) fabricated
-- Date: Wed, 31 Jul 2013 19:14:58 -0400 From: Bob Camp 2) I'll *guarantee* that the workers in the pictures didn't show up for work on a normal work day dressed like that. -- Fascinating video - well worth the 40 minutes spent watching it. Yeah - I noticed the manicured and painted nails as well as women dunking trays into etching baths in their Sunday Finest... Aside from the manufacturing process showing how labor intensive it was, it also added yet another dimention to what Rosie the Riveter's contribution to the war effort. ___ 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 Prototype Boards
With Glass/Epoxy protoboards being so expensive, I have bought several lots of a phenolic perf board for prototypes off the web and they have been the most inexpensive boards I have ever found. I don't feel bad about trashing failed prototypes.. Search your favorite site for 7x9cm PCB Blank Circuit Board - you will find plenty. Also - I tend to do point-to-point wiring by soldering 30ga kynar wire wrap wire to the pads. Silver plated - solders well... I have an old pair of flush cutters with a nick in the blade that works perfectly as a wire stripper... ___ 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] Net4501's cheap..
Seller obviously figured out that somebody feels they are of value and adjusted the selling price to see what he can squeeze out of them. I'd suggest making a $20 offer if you want to try to drive the price back down to what is reasonable Message: 6 Date: Sun, 19 May 2013 18:07:51 -0500 From: Didier Juges shali...@gmail.com To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Net4501's cheap... I snatched one for $20 and they are now $59 or best offer. ___ 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] NTPTool V2.0 - useful (free) utility
On and off I have been receiving error messages from various pieces of equipment about NTP errors from my pool of Symmetricom receivers. I finally found NTPTool at: http://www.geardownload.com/internet/ntp-server-tool-download.html (Click on the blue download image above the thumbnail image of the screenshot) It lets me flood NTP requests to my servers and I was able to find which one was dropping replies under high traffic. (I was able to open multiple instances and generate thousands of requests per second). (Problem solved - Bad gig SFP in the switchport connecting to the server) ___ 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] GPSDO Alternatives
While the Trimble Tbolts are still out there and reasonably available, are there any newer alternatives in the same general price range? ___ 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] Frequency generator and counter on same external reference
Good heavens, no. By doing so, they both have the same reference and the measuremets actually means something. I have a stack of HP stuff (3586, 3386 and assorted counters) all T'd off my Tbolt without issue. The only caveat is that you don't put too much stuff across the T-bolt output so as to load it down to the point where some device can't get clocking. Before you hit that point, you may need a high quality (low jitter) distribution amp in the timing chain. Date: Thu, 29 Nov 2012 09:42:39 + From: Chris Wilson Subject: [time-nuts] Frequency generator and counter on same external reference? I am repairing an 18GHz counter and it has a 10MHz external reference port. So does my elderly Marconi 2019A sig gen. Is there any potential issue having them both referenced off my Thunderbolt GPS referenced standard, at the same time? ___ 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] Frequency generator and counter on same external reference
Kind of funny you bring that up. I have an old Fluke 1900A counter (plastic case) that radiates 10mhz clock that deafens my receiver. It only took me a week to find the intermittent source of interference Boy, did I feel stupid... - Date: Thu, 29 Nov 2012 08:45:04 -0800 From: Chuck Forsberg Subject: Re: Frequency generator and counter on same external reference Two rules to follow. 1 - use well shielded cables for the 10 MHz distribution if you wish to receive WWV 10 off the air ... ___ 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] Sure Electronics GPS
I have purchased many items over the past few years from Sure and have never been dissapointed in that I receive. They do seem to have multiple seller accounts, each with different items - sureelectonics sureelectronics1 sureelectronics2 etc. Any way, I did a serch by seller and found a MG1613S Bluetooth/RS232 /USB UART GPS Module Demo Board item # 350239551536 by seller sureelectronics1 Don't know if this is the exact unit being discussed, but it may be a start. As usual, shipping is from China - delivery will take perhaps 2 weeks but If you aren't in a hurry you will probably be happy with what you receive. ___ 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] GPS jamming susceptibility
In the RC Model Airplane world where some brave souls are experimenting with autonoumous (UAV) flight , it is usual that they have a part-15 video downlink and/or telemetry at 900mhz or 2.4ghz and unless you put a trap on the input to the GPS receiver to significantly reduce those frequencies it can be expected that receiver de-sensing will occur and it is likely you will loose a very expensive 'toy' A shorted stub is often all that is needed, but it is often required... ___ 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] 60 KHz Receiver
If you want to see a R E A L L Y big vlf antenna check out thest two links. The first is about Soviet and US VLF antennas used for submarine communications during the cold war, and the second has a copule of photo's at the end of the powerpoint presentation of the installation in Cutler, Maine. http://coldwar-c4i.net/VLF/design.html www.eee.metu.edu.tr/~eekmekci/documents/vlf_antennas.ppt ___ 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] PICTIC II Parts - SOIC to PDIP Adaptor
Would something like eBay 180460919851 be a suitable adaptor? The description says that it takes .1 header pins on .3 centers 'ready for socket insertion'. I'm sure that there are other places (Sparkfun) that sell similar adaptors for those that have an aversion to on-line auction sites for one reason or another. ___ 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] DS-1 from 10MHz
I'm running more than a few days late on mail, but my inclination would be to
order a custom programmed SI5355 from Silicon Labs for $5 - no minimum quantity
and 2 week turnaround. Admittedly the part is a qfn (SMT Quad Flat-pack
No-leads) but it is easy, can run off an external user provided reference
clock, and has reasonable jitter ('typically 50ps - not as good as an SI570 but
a whole lot better than an AD9851 DDS), and for a T1 clock should be perfectly
suitable.
From the Silabs page:
The Si5355 is a highly flexible clock generator capable of synthesizing four
completely non-integer related frequencies up to 200 MHz. The device has four
banks of outputs with each bank supporting two CMOS outputs at the same
frequency. Using Silicon Laboratories' patented MultiSynth fractional divider
technology, all outputs are guaranteed to have 0 ppm frequency synthesis error
regardless of configuration, enabling the replacement of multiple clock ICs and
crystal oscillators with a single device. Through a flexible web configuration
utility
called ClockBuilder™ (www.silabs.com/ClockBuilder), factory-customized
pincontrolled
Si5355 devices are available in two weeks without minimum order
quantity restrictions. The Si5355 supports up to three independent,
pin-selectable
device configurations, enabling one device to replace three separate clock ICs.
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[time-nuts] A very different analog clock
This is for the Uber-Timenerds http://www.adafruit.com/blog/2010/06/24/multimeter-clock-styled-after-the-simpson-260-multimeter/ ___ 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] Info on Rockwell TU00-D130-031-9230
The ugly header is a 2mm spaced header instead of the 'normal' .1 header (2.54mm). You will find that you can use a laptop 2.5 drive adaptor connector will typically have 2mm to 2.54mm headers that can be 'adapted. I suspect that you can purchase 2 row 2mm headers on that on-line auction site as well... ___ 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] The WWVB Atomic Clock Kit #7
I noted this while looking for a DDS VFO, and thought it interesting and affordable if you are interested in a 60khz WWVB receiver kit for $30 plus postage. As a standard disclaimer, I have no affiliation with the gents producing the kit. The URL is: http://www.qsl.net/k5bcq/Kits/Kits.html And verbage from the site is as follows: This not your father's WWVB clock. Many CW output features and even Westminster chimes have been added. In fact we have 22 selectable parameters for those who like pushing buttons. Since it is very difficult to maintain a 60Khz RF link to WWVB during the day the Atomic Clock indicates when it was last synced to WWVB. This will allow you to experiment with various VLF antennas to see which is best. Antenna orientation is also important and you can experiment there. I've been using some larger ferrite rods (off eBay) with great success. Also tried some Litz wire antennas. Great fun. The best way to describe all of it's features is to walk through the setup process. Power: The Atomic Clock draws 0.22 mA running current, and 1.08 mA beeping current. To reduce power consumption the microcontroller hunts for the correct WWVB signal during the first 10 minutes of every hour. Two AA batteries should last a long time. Construction: A diagram is located on the schematic page. Components on the back are shown in mirror image. Mount a 2pin header on the CMMR-6P-60 for antenna attachment and experimentation. Remember this is “H” field, locate the ferrite rod away from metal and at right angles to Ft Collins CO, WWVB for best reception….mostly in the late evening and very early morning hours. Use: Step forward through the Modes by pushing the Mode button. Backup by holding in the Mode button until you hear the first half second tick. You can repeat this. If you hold the Mode button in for two half second ticks you go back to the “clock”. All data is immediately stored in flash memory at the time you change it. Clean display (no prefix) means you are “set” to WWVB, otherwise U,S,E,L is displayed for Unsynced (no sync detected), Second sync detected (it requires two good sync pulses before updating the time data with WWVB), Error (noise), or Loss of any signal. The microcontroller wll attempt to detect WWVB and sync up during the first 10 minutes of the hour (drawing ~1mA) it will then revert to 0.22mA for the remaining 50 minutes whether synced or not to conserve the battery. You can use #22 (below) to determine antenna effectiveness. Modes/Parameters: Initial default is Clock shown as “HH – MM – SS” with; Offset = -6, Interval = 1min, Beeper On, Call On, Tick On, and Westminster On Offset ….GMT offset selectable from -12 to 12 Beeper On/Off ….One mode provides all sound On/Off for quiet running (wife's request) Beeper Tone …. Frequency selectable from 294 Hz to 2093 Hz Beeper Speed …. Morse WPM selectable from 3 WPM to 40 WPM Beeper Interval …..Selectable output interval of #14 and/or #15 from 1 to 60 minutes. Test mode output including everything for “0” interval Call 1 …. Callsign entry (saved) by number A-Z = 1 - 26, 1234567890 = 27-36 Call 2 ….same as #6 Call 3 ….same as #6 Call 4 ….same as #6 Call 5 ….same as #6 Call 6 ….same as #6 Call 7 ….same as #6 Call 8 ….same as #6 Call On/Off ….Send Morse Code call sign de Callsign Callsign up to 8 characters for output to Beeper, LED, and Key output for rig Time On/Off …. Send Morse Code Time to Beeper, LED, and Key output for rig Westminster On/Off …. Westminster Chimes on Quarter Hour with Hour(s) “Gong” on the Hour Tick On/Off ….One second tick RS232 9600/4800 Baud ….9600 or 4800 Baud selectable for $GPZDA time data RS-232 output Display 12Hr/24Hr …. 12Hr or 24Hr mode shown on the LCD Set Hour …. Manual setting of Hours and Minutes if necessary Set Minute …. Manual setting of Hours and Minutes if necessary Tells you when the last successful setting to WWVB occurred, format: YYMMDDHHMMSS The price for the WWVB Atomic Clock Kit #7 (without the CMMR-6P-60) is $20 plus $2 postage in the USA and $5 postage for DX. The CMMR-6P-60 is available for $10 with no additional postage if ordered with the kit. We did that since several local people already have this WWVB receiver and the other worldwide time standards require different receivers and microcode (which is TBD). ___ 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] Notes on the Driscoll VHF Overtone Crystal Oscillator
Interesting read on a low phase noise oscillator by Chris Bartram GW4DGU http://www.christopherbartramrfdesign.com/blaenffos/oscillator/VLNO.pdf ___ 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] Marginally off topic... Aircraft Automatic Direction Finders as beacon receivers.
Approaching off topic, but possibly of interest as Loran and WWVL is on the fringes of this... I have several dead King KR-85 ADF untis that I want to repair and press into service as 505khz beacon monitors. Designed primarily for receiving 200khz to 500khz non directional beacons, they came out of 1970's vintage private planes and to date I have not been able to come up with a service manual with schematics (short of paying $70 for a manual at Esso Air). Is there any chance that anybody out there may be able to assist with at least a partial copy of a manual These things are interesting - run on 12 volts, typicaly have an IF strip in the 150kc range and have a digitally generated vfo that has a TTL divider chain and a PLL for generating a sine wave. BFO included! And the front end on these things have pretty good input filters divided into three bands - 200khz-400khz, 400khz-800khz and 800khz-1600khz (Yup - covers the AM radio band) to reduce intermod fro out of band stuff. Conversion to 137 or 185khz would be awkward, but theoreticaly should be possible, likewise conversion to ham 160m, or down to 60khz or 100khz for other fun stuff. They have a balanced loop input as well as an unbalanced sense antenna - lots of potential! 73 - Tom in St. Louis ___ 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] 5070B once more.... (actually capacitors)
The word we got from our Dell National Accounts rep was that there was a run of contaminated electrolyte affectring several capacitor manufactures. Gee, go figure QC issues in a country still painting toys with lead based paint... Any way, I recently purchased a pile of low ESR caps from Mouser to fix five machines from the junk pile at work to build more linux utility boxes. (perhaps $40) Turned out being a lot harder than I had anticipated as the internal ground planes on the Dell Motherboards made the old caps dogs to remove, and the new ones very hard to solder back in without cold joints. After the first one, I returned the others to the pile and picked up other machines with good motherboards and bad hard drives or power supplies to get the rest of the machines I needed. Guess I failed rework-101... Message: 6 Date: Sat, 23 May 2009 22:04:54 + (GMT) From: Robert Atkinson robert8...@yahoo.co.uk Subject: 5070B once more (actually electrolytics) I'm not sure if the espionage story is true. However there is a problem with electrolytics. the modern ones have got a lot smaller and run hotter due to incresed PSU switching frequencies. From: g4...@g4fre.com Date: Saturday, 23 May, 2009, 2:30 PM I just got hit by this issue in my Dell GX270. Its the one i use for HPIB instruments/HeatherDoing a web search i found lots of posts on they used faulty capacitors. ___ 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] Rockwell GPS Chipset
Any chance it is a Jupiter? http://www.gpskit.nl/gps-readme.html If so, they are fine receivers. THe header pins are 2mm spcing - same as used on laptop hard drive adaptors ___ 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
Also used on old lighthouse tubes used for uhf and low microwave applications fro the '40's and '50's. If my memory serves me, these tubes were found in devices like the airborne APX-6 IFF Transponder in which the greatest hazard was the detonators used to destroy the device should a plane go down over enemy teritory... An instrucor in the 70's made sure we were paranoid about both the berylium oxide and explosives... ___ 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] What Price Precision?
For those who are ARRL members, they now have archives of QST on-line. I stumbled across a two part series in the Sept and Oct 1952 QST ehtitled: What Price Precision? The economics of Frequency Standards By George X.M. Collier W0EG The article highlights Crystal Charactgeristics,Hammarlund FS135C Standard, Millen 90501 standards in part 1 then goes into building your own in part 2. The ordinary ham could attain 1x10-7 on a 100kc standard! A delightful look back ___ 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] Thunderbolt temperature spikes
My own gut feeling is that it is a glitch making its way through one of the power supplies. Its decay looks like it could be capacitive... Pr thermal. or (fill in the blank) I'm using the brick power supply povided and it is possible that they generate transients, or poorly react to normal line garbage. I'm off for a week of forced vacation (hernia repair - picked up too many boat anchors at hamfests...) but plan to proceede with building linear supplies with battery backup. Once I'm isolated from the mains the glitches will prove themselves by their presence or absence. If anybody out there has a red box Thunderbolt that runs off a single dc supply - could you graph the temperature and see if you have similar spikes? Also, I note that there is a Thunderrbolt E out there with a different connector layout (has a BNC connector for the antenna input instead of an F connector) and touts improved holdover times. On the off chance that anybody has one of those, do they also suffer these glitches? ___ 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] Thunderbolt temperature spikes
I too am seeing them - four or five events during a 24 hour time period. Below are 50 temp readings before and after an event. 32.82 32.82 32.82 32.82 32.82 32.82 32.82 32.82 32.82 32.83 32.92 32.91 32.90 32.89 32.89 32.88 32.87 32.87 32.87 32.86 32.86 32.85 32.85 32.85 32.85 32.84 32.84 32.84 32.84 32.84 32.84 32.84 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 32.83 ___ 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] Thunderbolt Data Plotting
Well - I have lots and lots of raw numbers, and no really good way of plottinng it. I'm hardly a linux guru, but would gnuplot be a suitable tool for graphing data like the snipper below? 374741 -0.5 0.00 0.7314587 32.10 0 130 18.2 158 4.0 12 1.8 132 3.2 157 9.0 152 5.8 138 12.0 133 6.2 374742 -0.4 0.00 0.7314491 32.10 0 130 18.0 158 4.4 12 1.8 132 3.4 157 9.0 152 5.8 138 12.0 133 6.4 374743 -0.3 0.00 0.7314491 32.10 0 130 18.2 158 4.4 12 1.8 132 3.4 157 9.2 152 5.8 138 12.2 133 6.2 374744 -0.2 0.01 0.7314491 32.10 0 130 18.0 158 4.6 12 1.8 132 3.4 157 9.2 152 5.8 138 12.0 133 6.0 374745 -0.2 0.02 0.7314491 32.10 0 130 18.0 158 4.8 12 1.8 132 3.2 157 9.2 152 5.6 138 12.2 133 6.2 374746 -0.1 -0.01 0.7314491 32.10 0 130 17.8 158 4.8 12 1.8 132 3.6 157 9.2 152 5.6 138 11.8 133 6.2 374747 0.0 0.01 0.7314491 32.10 0 130 17.4 158 4.8 12 1.8 132 3.4 157 9.4 152 5.8 138 12.2 133 6.6 ___ 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] Thunderbolt Loop Damping
The manual doesn't give much direction on tweaking the disciplining parameters. Also, not having anything better to compare results to, I'm pretty handicapped. Has anybody done any tweaking and perhaps can offer any suggestions? Over the weekend I was able to get a GPS antenna on the roof coupled to the receiver in the basement by using an abandoned run of RG6 (Thanks Direct-TV! - The ATT U-Verse doesn't fade during storms...) Logging of the 10mhz shows it stays pretty much under 0.05ppb. The Excel graphs are easy to generate, but not easy to use if that makes sense. Limited to 32k datapoints per graph and very difficult to zoom in on. Also, Is anybody else as confused as I am by negative ppb numbers??? is 0.00ppb the 10x-11 baseline so that -0.01ppb is really 0.009ppb? Tom ___ 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] Thunderbolt Power Question
As the requirement is for a few milliamps it appears that All Electgonics has an inexpensive DC DC converter http://www.allelectronics.com/make-a-store/item/DC-32/DC-DC-CONVERTER/-/1.html that runs off of +5v. All I have to do is to run the -19v output throught a negative regualtor and its a done deal. ___ 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] Thunderbolt Power Question
As I sit here reviewing the power requirements for the Thunderbolt, I note that the -12v is only 10ma. Does this indicate that it is only used for the RS232 output and if so for a battery backup I can cheat and only service the +12v (750ma)and +5v (400ma)? ___ 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] THUNDERBOLT STATUS LED'S
/snip Date: Mon, 23 Jun 2008 09:24:35 -0700 (GMT-07:00) From: Richard W. Solomon [EMAIL PROTECTED] Subject: Re: [time-nuts] THUNDERBOLT STATUS LED'S If there is NMEA Data available, there is a design utilizing a PIC chip that will indicate 3D GPS Fix. It was published by W1AUV. 73, Dick, W1KSZ / end snip This si something that has been on my laundry list for quite a while. Some time ago I became enchanted with the PicAxe chip and determined that reading $GPGSA data for the value of 3 is a pretty easy thing to do. For those not familiar with the picaxe is as a pic with a bootloader built in and a free Basic-Like compiler. While it is somewhat limited in what it can do, and the speed that it can do it, the price is extremely attractive... http://www.rev-ed.co.uk/picaxe/ $GPGSA,A,3,04,05,,09,12,,,24,2.5,1.3,2.1*39 Where: GSA Satellite status AAuto selection of 2D or 3D fix (M = manual) 33D fix - values include: 1 = no fix 2 = 2D fix 3 = 3D fix 04,05... PRNs of satellites used for fix (space for 12) 2.5 PDOP (dilution of precision) 1.3 Horizontal dilution of precision (HDOP) 2.1 Vertical dilution of precision (VDOP) *39 the checksum data, always begins with * ___ 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] Simple NMEA Display
From: Luis Cupido [EMAIL PROTECTED] Can anyone point me to any simple program, must run on older machines (windows 98) be and free. I mean very basic stuff for sanity checks of system antena etc. -- Very basic, Very Simple and very Free.. Use the hyperterminal program that comes with windows 4800 baud 8,N,1 and just look at the serial data http://www.gpsinformation.org/dale/nmea.htm for information on how to decode by hand Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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] GPS World Web page
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY WOW!!! What a resource. Something for everybody from the kid that is geo caching to the physicist. Nice digital delivery too.. http://www.gpsworld.com/ Tom Get easy, one-click access to your favorites. Make Yahoo! your homepage. http://www.yahoo.com/r/hs ___ 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] WinOncore
I just received an older 8 channel Oncore GPS board - still not sure if it is a timing or navigation part... In any event, I have found plenty of documentation on it, but so far none of the links for the Motorola eval software WinOncore (presumably free) seem to be functional. Can someone help me out? All I want to do is to be able to easily read the binary output, set date/time (etc) and change output to NMEA as needed. I have several MAX-232 parts so getting good RS-232 isn't going to be an issue. Tom in St. Louis __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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.
[time-nuts] Snopes on the Danish Question
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY http://www.snopes.com/college/exam/barometer.asp __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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] Parallel voltage regulators
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY This has been a fascinating and educational thread! I have always been aware of noise coming from switching regulators - just have Argo or Speclab look at your laptop's sound card with no input signal and there is plenty to look at until you go to battery power. I had never considered diode switching noise in linear supplies, nor birdies from an assortment of logic devices - though I am a believer in healthy distribution of bypass capacitors... Now if Sears only sold Diehard batteries that put out 3.3 volts... __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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] Parallel voltage regulators
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Thanks for all the good feedback! Looks like the LM388 is the way I'm to go. Got to toddle off to the local surplus shop in the morning to see what they have in the goodie bin. If they don't have it eBay is full of them. Tom __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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] 60khz NTP Server?
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Thanks for all the replies on-list and off! I also found a list of manufactures at: http://tf.nist.gov/general/receiverlist.htm Tom __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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.
[time-nuts] 60khz NTP Server?
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Does anybody know of a product that is an NTP server that gets its time source from WWVB at 60khz? There are lots of Atomic Clocks out there but I haven't seen one that does what I want. If I had money I'd be purchasing Symetricom SyncServers (I don't) and a lot of locations don't have Internet. Tom __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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.
[time-nuts] Improving the stability of crystal oscillators
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY While the website is not explicitly about frequency measurement, there is an interesting bit on improving the stability of crystal oscillators with external heater controllers. While it may not be suitable for long term high stability control it might be suitable for many other purposes. http://www.qrss.thersgb.net/Crystal-Ovens.html The main page is also a good read: http://www.qrss.thersgb.net/Receiving-QRSS.html#Introduction Need a vacation? Get great deals to amazing places on Yahoo! Travel. http://travel.yahoo.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] Lucent WR-92066 L10 RFG-XO
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I also bought one that hasn't arrived yet. With the XO in the part number I am under the belief that it is a crystal oscillator, not Rubidium. I may be wrong, but the unit with the Rubidium oscillator is probably LUCENT RFTG-M-RB KS24019 L105B FOR CDMA MINICELL I also think there was some discussion perhaps 6 months ago about these units. Did anybody ever get a pair of them working? - Date: Tue, 02 Oct 2007 16:25:06 -0700 From: Bill Janssen [EMAIL PROTECTED] Subject: [time-nuts] Lucent WR-92066 L10 RFG-XO on : text/plain; charset=ISO-8859-1; format=flowed OK I bought one of those Rubidium's off of that E*** place and I am wondering whatI am getting. Is it obvious how to power it up or do I need a manual, Some one on here had some pictures, that I didn't book mark. Anyone have details of that device or did I just order another door stop. Thanks Bill K7NOM Yahoo! oneSearch: Finally, mobile search that gives answers, not web links. http://mobile.yahoo.com/mobileweb/onesearch?refer=1ONXIC ___ 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] HP-3566 Mini Manual
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Nice web page at KO4BB's Home Page: http://www.ko4bb.com Lots of good stuff including a 30 page brief operating manual for the 3586. Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more. http://mobile.yahoo.com/go?refer=1GNXIC ___ 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] GPSDO Question
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I have gathered everything I need to assemble a GPS Disciplined Oscillator. I have the Brooks Shera controller assembled, am about 99% done on the linear power supplies for +/- 5V, 12V supplies and a separate 24V oven heater supply. The GPS Engine is purring away happily with a good active antenna - spewing NMEA data and 1pps to anything willing to listen to it. The HP-10811 oven is sitting happily in a working 5328A counter that I'm willing to cannibalize, but do I need to? Is there any reason why I shouldn't put the controler in the 5328 case so I can use it as a counter as well as timing source? 73 - Tom in St. Louis Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mailp=summer+activities+for+kidscs=bz ___ 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] HP-5328A Channel C Board Replacement Question
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I am replacing a defective Channel C board in my trusty 5328 counter. The old board is PN# 05328-20016 and the replacement (off eBay) is 05328-60045. Not quite plug-N-play... The new board has an SMA connector (I can handle that) and also has three wires hanging off it the old board doesn't... A blue wire 'jmp' and two grey wires 'TP-' and 'TP+' They have push on connectors that obviously go to a .010 post somewhere in their former life. I have no clue.. Can someone enlighten me? 73 - Tom in St. Louis Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.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.
[time-nuts] Crimping VS Soldering
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] The key is the gas tight connection between the surfaces. If moisture and/or oxygen can't get in the conection will remain true. Back in an earlier life in the telecommunications industry connections went from soldered to wire wrapped in the 70's. We were all distrustful of a 'twisted on' connection until it was explained to us. The proof was in the pudding (so to say) when after a year or two statistical analysis revealed that the post-install trouble rates plummeted with the advent of wire wrap, but after 10 years started creeping back up as the frame blocks reached the end of their reliable life as circuits were reterminated on those little square posts with the less than perfectly square corners... Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search http://search.yahoo.com/search?fr=oni_on_mailp=graduation+giftscs=bz ___ 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] Time may not exist
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Just to stir the pot a little - I'm providing a link to Discover magazine - a tome of great repute and a source of information on scientific discoveries of epic magnitude... Enjoy... http://discovermagazine.com/2007/jun/in-no-time Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more. http://mobile.yahoo.com/go?refer=1GNXIC ___ 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] Fury GPS
Wow - only $750 in quantity of 20 or $1k in singles. That's not much more than what you spend putting together your own. By the time you come up with the HP-10811, controller, power supplies and GPS you have come close. So, can I borrow $1k from someone? :) Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos more. http://mobile.yahoo.com/go?refer=1GNXIC ___ 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] Active LF Antennas
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Is the Doug Baker LF antenna still available? If so, how does one go about obtaining one? Get the Yahoo! toolbar and be alerted to new email wherever you're surfing. http://new.toolbar.yahoo.com/toolbar/features/mail/index.php ___ 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] Active LF Antennas
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Brooke - you scored a bullseye on that one. I had a couple of false starts, but got an email back from Frank Gentges suggesting I contact Far Circuits for the PC boards ($11.50 for the set which includes shipping). Now to obtain the rest of the parts... I received an HP-3586C via UPS today and it is in great shape. Hoping to do some playing around with LF as well as FMT with K5CM and his gang of FMT-Nuts... So many great ideas and only 24 hours in a day... Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ___ 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] HP-3336A - High Precision Attenuator
Greg Burnett hit the nail on the head. It is a machined base with four solenoids. I'm a bit hesitant to start taking screws out of it as I'm not sure what holds what together... Though if it is dead, what additional harm can I do... Any waym the assembly seems to have an HP part number of 1979a - anybody ahve a schematic on either the high precision attenuator for the 3336a or something on the HP part number 1979a? I have photo's I can email if it would help. Tom in St. Louis Yahoo! oneSearch: Finally, mobile search that gives answers, not web links. http://mobile.yahoo.com/mobileweb/onesearch?refer=1ONXIC ___ 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] HP-3336A Manual
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] I perused the pdf manual and came up more confused than when I started... My problem seems to be in the Option 005 high precision attenuator (as I can best tell). There is an aluminum box between the circuit board and the front panel 75 ohm, 135 ohm and 600 ohm outputs. That mysterious 'box' seems to be open. I'm not sure if it is just an impedence matching assembly, or if it includes the option 005. As the front panel level control is changed, the raw 50 ohm board output measures between +5 and -5 dbm and every time the display crosses a -3dbm threshold (-3, -13, -23 etc) you hear a relay click and the raw output jumps back up 10db. Hope that clarifies more than confuses... Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mailp=summer+activities+for+kidscs=bz ___ 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] HP-3336A Level Generator Question
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] The UPS man just delivered a care package from my latest ebay purchase!!! I fired it up and found the front panel displayed properly, but no output on the 75ohm BNC connector, but the rear panel 21-60mhz aux works fine as mesured by a 5328a counter. Pulled the bottom off and note that the 50 ohm output into the matching box has good signal - problem in the 50/75/150/600 assembly. Question - as I believe I only really 'care' about a 50 ohm output is there any reason not to use the raw 50 ohm output? At this time, I have no way of measuring levels (3586 is a future purchase) so I have no way of knowing how much the output levels are dependent on the matching assembly and what protections the matching assembly affords the output of the generator. Also - the 5328a has an undisciplined high stability oscillator, and the 3336a doesn't. At 10mhz they agree within .8hz +/- .5hz wandering around over the course of an hour. Not too bad for $125 on eBay for the pair of them (including shipping). Hope my luck holds... Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html ___ 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] HP-5328A Manuals / Schematics
I'm wanting to work on the divider chain to incease the gate time from 10 seconds up to something much longer forr increased resolution. Are these on-line somewhere? Tom in St. Louis Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool. http://autos.yahoo.com/carfinder/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Lucent RFTG-M-XO reference question
Before I go and spend $150 on eBay for one - I would like to know if they can be used as a stand-alone GPS desciplined oscillator without the 10mhz input from the rubidium unit. Also - has anybody found a manual on-line for one of these guys? 73 - Tom in St. Louis There was an older posting from Oct 2005 describing the RFG-M unit: The board you are describing is used in the Lucent RFG-M-XO reference frequency generator. It takes in 10 MHz on J2 from a Rubidium oscillator and disciplines the Efratom SC cut OCXO on the main board from the 10 MHz input. The output from the OCXO is converted to 15 MHz and supplied as the reference output on J4. The RFG-M-RB and RFG-M-XO normally mount together in a chassis (which I didn 't get) and the modules are connected to the chassis by a harness with a DB15 on the chassis end. The pin out for the harness is as follows: DB15M TO/Pin# Description Pin # 1RFG0 - P1-1+24v 1.3A/0.6A 2RFG0 - P1-2Common 3RFG1 - P1-1+24v 0.6A/0.4A 4RFG1 - P1-2Common 10 RFG0 - J3-1 Alarm 11 RFG0 - J3-2 Alarm 12 RFG1 - J3-1 Alarm 13 RFG1 - J3-2 Alarm A second interface cable ties the RB to the XO as follows: RBJ5 XOJ5 Pin #Pin# 15 33 The male DB9 is P1 and pin 1 = +24v @ 400ma, Pin 2 = Common. This will power up the board so you can verify operation of the OCXO. Unfortunately that is all the information I have on the unit. Hope this helps. Give spam the boot. Take control with tough spam protection in the all-new Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_html.html ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
