[time-nuts] Practical Allan Plots

Hi: I'm working on my Time & Frequency web page and have tried to summarize my simple understanding of what's going on. I could use help in the way of comments. http://www.pacificsites.com/~brooke/timefreq.shtml#Allan Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com

Re: [time-nuts] OT: Audiophoolery

number of dB down from max output. After calculating the noise level it turned out to be maybe 10 dB above 1 mw. So I'd say that excellent speakers may or may not make everything else unimportant. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsi

Re: [time-nuts] Watch Crystal Aging Rates

ta on watch crystal aging? If there was a known aging rate then it could be backed out in the countdown circuit resulting in much better accuracy. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisioncloc

[time-nuts] Higher measurement rate to improve TIC quality?

an be made 10 times in each second (the test signal is changed to a 10 Hz square wave), then the point on the Allan curve is now a facter of 10 lower. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisio

Re: [time-nuts] 10MHz to 32MHz?

Hi John: Is there any data on how the Reflock II does as the basis of a GPSDO compared to other ones? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com John Ackermann N8UR wrote: > You might look

Re: [time-nuts] Odd request

Hi Tom: I've been looking at patents for secondary clocks and find that there's two class numbers: 368/59 is Horology/Secondary and 968/548 is Horology/stepping secondary. Do you know what the difference is between the two top class numbers both called Horology? Have Fun, Bro

Re: [time-nuts] GPS: ADEV or MDEV?

rters and only needs manual tweaks about once a year. Have Fun, Brooke Clarke http://www.PRC68.com http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Tom Van Baak wrote: >>>Can someone do a similar numerical analysis of these two >>>factors: t

Re: [time-nuts] GPS: ADEV or MDEV? (Tom Van Baak)

fered by the difference in the definition. Quite amazing. They also can be used as a kind of sampling scope. As I remember it the data is arranged in a strange way. There might be a driver available from Agilent to do the scope thing. Have Fun, Brooke Clarke http://www.PRC68.com

Re: [time-nuts] retry: PRS10 has spurious frequencies

Hi Henk: Here is a spectrum plot from my PRS10. But it's also connected to the SR620 so I'm not sure where the spurs are coming from. Have Fun, Brooke Clarke http://www.PRC68.com http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Henk ten Pierick

Re: [time-nuts] retry: PRS10 has spurious frequencies

Hi: Sorry. That was a phase plot in the same folder on my computer. Here's my spectrum plot. Have Fun, Brooke http://www.PRC68.com http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Brooke Clarke wrote: Hi Henk: Here is a spectrum plot from my PRS10.

Re: [time-nuts] GPS Disciplined Oscillators

xtended. I expect that they all would bottom out and go horizontal in after a few days. But at different stability values. Seeing that would answer your question in a better way. I have some T&F info at: http://www.pacificsites.com/~brooke/timefreq.shtml Have Fun, Brooke Clarke, N6GCE ht

Re: [time-nuts] Updated VLBI tutorial available on gpstime.com

Hi Tom: I didn't see in the VLBI slides what was done to "tune" the delay line, but did see a hint that there's been a firmware upgrade for it. Can you elaborate? I like the Cursor Clock on your web page. Have Fun, Brooke Clarke http://www.PRC68.com http://www.paci

Re: [time-nuts] Fury Realhamradio listing

Hi Said: The Fury is at: http://resco.ucol.mx/Fury/gpsstat.htm Tom's Z3801A #4 is at: http://www.leapsecond.com/gpscon/gpsstat.htm Is the Fury command set the same as the Z3801 or did they add commands for the Fury? Have Fun, Brooke Clarke http://www.PRC68.com http://www.pacificsite

[time-nuts] Simple Interpolator

Hi Magnus: I tried looking at the HP 5335A manual, but the one on the Agilent site has an unreadable A4 schematic. Do you have a high resolution A4 schematic, or better a schematic of the interpolator? Have Fun, Brooke Clarke http://www.PRC68.com http://www.pacificsites.com/~brooke

Re: [time-nuts] Gentlemen, unlimber your Broadband Connections

bookmarks so I usually make my own. I have gotten Microchip to change from chapter titles that were meaningless to their now fine bookmarks. But so far my attempts to get the Army to change have not succeeded. More at: http://www.pacificsites.com/~brooke/Mpdf.shtml#Nav Have Fun, Brooke Clarke

Re: [time-nuts] LF time signal emulation

around you house top to bottom. Have Fun, Brooke Clarke http://www.PRC68.com http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Palfreyman, Jim L wrote: > Folks, > > Living in Australia we are generally out of range of the LF time signals > (WWV

Re: [time-nuts] I've lucked it!

See: http://www.prc68.com/I/Loop.shtml I expect this is the chip used in your LF timing receiver since it's the only one I know of that automatically looks for all three frequencies. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Palfreyman, Jim L wrote: > As p

Re: [time-nuts] Software Sawtooth correction prerequisites?

whatever the new name is) chips and there's some preliminary work on a phase detector up to the stability needs of that receiver. Sawtooth correction will be a part of that design. Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http://www.precisionclock.com Jim Miller wrote: > M

Re: [time-nuts] Trimble Mini-T

let's hope it's the latter. For example the Thunder Bolt "data sheet" has Allan type data, see: http://trl.trimble.com/docushare/dsweb/Get/Document-10015/ Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Christopher Hoover wrote: > A new(er?) GPS

Re: [time-nuts] Scanning darkly

Hi Bill: I have some hints & tips about scanning on my how to make pdf documents web page at: http://www.prc68.com/I/Mpdf.shtml#Scan Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Bill Hawkins wrote: > Having too much trouble scanning a fifties m

Re: [time-nuts] austron 2084 Multifilter

Hi Lee: I got mine on eBay. Prior to using it I hadn't appreciated the sferics problem. You'd be surprised at how often the sferics lamp lights. I also tuned the notch filters for the RTTY stations that are nearby. http://www.prc68.com/I/A2100F.shtml#2084 Have Fun, Brooke C

Re: [time-nuts] Z3801A with other GPS receiver

someone would come clean and tell us how HP got around the sawtooth bug in detail, then you could take the output from an M12+T and recreate a data stream that would look just like the 6/8 channel unit including the buggy sawtooth byte. Have Fun, Brooke Clarke http://www.PRC68.com http

[time-nuts] The Observatory Vol Viii 1885

to it. I also have the link on my Self Winding Clock Co. web page: http://www.prc68.com/I/SWCC.shtml Google is archiving books that are in the public domain and making them available as free downloads, or to be viewed on line at http://books.google.com -- Have Fun, Brooke Clarke http://www

Re: [time-nuts] Kode 375-928 Display - Help! RS-422 & RS-485

table. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Jason Rabel wrote: > Interesting you would mention that! After my first post I pulled the board > with the connector and was looking at the traces from the DB-25. One of the > chips nearby is a SN75176AP whic

Re: [time-nuts] HP E1938 oscillator

n the list of manuals for discontinued equipment that he is working to put on line. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Murray Greenman wrote: > Hi, > > Does anyone know where I might find a manual for the HP E1938 'hockey > puck' o

[time-nuts] Pendulums & Atomic Clocks & Gravity

GPS satellite. Granted E-18 can not now be done using the current GPS system, but when atomic clocks get into the E-16 or better area and are in satellites, I think the quality of time transfer will keep up. Just an idea & Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisi

Re: [time-nuts] Pendulums & Atomic Clocks & Gravity

able. Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http://www.precisionclock.com WB6BNQ wrote: > Brooke Clarke wrote: > > >>Gravity also effects atomic clocks, see: http://www.leapsecond.com/great2005/ >>and this puts a limit on what can be done with any atomic clock that

Re: [time-nuts] Pendulums & Atomic Clocks & Gravity

Hi Tom: I get it. It's really "g" that matters and not the force (F = m * g). Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Van Baak wrote: >>Then a pendulum calculator at: >>http://www.ajdesigner.com/phppendulum/simple_pendulum_e

Re: [time-nuts] Pendulums & Atomic Clocks & Gravity

Dent clock at Greenwich in 1885 had an arenoid type compensator to remove barometric pressure effects, later clocks were run in vacuum. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Mike S wrote: > At 01:17 PM 5/26/2007, Brooke Clarke wrote... > >>Just

Re: [time-nuts] Pendulums & Atomic Clocks & Gravity

Hi Bruce: Yes, I saw a mention of that. Sort of like crystal frequency jumps. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Dr Bruce Griffiths wrote: > Brooke Clarke wrote: > >>Hi Mike: >> >>Back in the 1800s clock makers found ways to te

Re: [time-nuts] Pendulums & Atomic Clocks & Gravity

edchenko observatory clock was the ultimate. About 2 milliseconds per day. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Mike S wrote: > At 07:49 PM 5/26/2007, Brooke Clarke wrote... > >>Back in the 1800s clock makers found ways to temperature comp

Re: [time-nuts] Pendulums & Atomic Clocks & Gravity

. Also have "Accurate Clock Pendulums" on the way. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Van Baak wrote: > . . . . . > Those of you really interested in the history, art, and science > of pendulum clocks should see the following six b

Re: [time-nuts] common mode loran comparisons

t; LOARN-C receivers. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com tom jones wrote: > I'm getting great results monitoring daily phase changes of the fallon loran > master station. > I don't have any computer logging from my austron 2100'

Re: [time-nuts] common mode loran comparisons

of the SDR-IQ radios that's speced to go down to 500 Hz (not kHz, but Hz). I'm planning on using it to visualize Bat chirps, see: http://www.prc68.com/I/Bats.shtml#SDR-IQ It should also be great for LORAN-C, but again PC software would be needed. Have Fun, Brooke Cl

Re: [time-nuts] common mode loran comparisons

se in degrees maybe he could show time delay? What is the antenna & equipment being used? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Alan Melia wrote: > Brooke I wonder if you have seen this page from a European friend of mine. > Markus Vester DF6NM &

[time-nuts] Connection Info Wiltron 610C-MS-1042 Xtal Oscillator?

ching a very small photo of the oscillator. -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com <>___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

Re: [time-nuts] Connection Info Wiltron 610C-MS-1042 Xtal Oscillator?

type of grounding on the outputs. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rex wrote: > On Sat, 09 Jun 2007 00:21:54 -0700, Brooke Clarke <[EMAIL PROTECTED]> > wrote: > > >>Hi: >> >>Looking for connection and any other inf

[time-nuts] On Setting the Astronomical Time

t's 8 orders of magnitude away from the precision of UTC. Is there some way to get TT to better than a tenth of a second, or is the earth just too sloppy of a time keeper? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com _

Re: [time-nuts] On Setting the Astronomical Time

eak at 4.133E-7 Hz would be more like 28 days and it would be interesting to see where the others were. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Van Baak wrote: >>Setting your clock using GPS time, or with the known offset UTC is straight >>for

Re: [time-nuts] Connection Info Wiltron 610C-MS-1042 Xtal Oscillator?

Hi Rex: I can figure it out now. Thanks very much, Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rex wrote: > On Sat, 09 Jun 2007 09:09:56 -0700, Brooke Clarke <[EMAIL PROTECTED]> > wrote: > > >>Hi Rex: >> >>Yes, although I w

[time-nuts] Name That Rb Frequency Standard

.5E-9/2E-10 or 7.5 years." Which standard is he reffering to? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

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

Hi Pete: I resemble that remark. There's been quite a bit of discussion of how Google will point you to the IEEE explore web page and show sentence fragments of the actual paper, when the paper is not openly available on the web. Have Fun, Brooke Clarke http://www.PRC68.com

Re: [time-nuts] My Casio G-Shock watch and other fun stuff

o continue running without the time signal and keep very good time. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Palfreyman, Jim L wrote: > John, > > My watch is one of these: > > http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=120108656745 &g

Re: [time-nuts] My Casio G-Shock watch and other fun stuff

Hi Tom: How was that data taken with, a Microset or some other way? It's interesting in that it shows the rate was not adjusted. The Heathkit GC-1000 WWV/WWVH clock adjusted it's rate. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Van Baak wrote

Re: [time-nuts] My Casio G-Shock watch and other fun stuff

s.shtml <- Bats http://www.prc68.com/I/SETSC.shtml#IMP2 <- IMP2 slave clock driver http://www.prc68.com/I/PSOSC.shtml <- Removing the sensor from a camera Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Van Baak wrote: >>Hi Tom: >> >>How was

Re: [time-nuts] bad lcd readout on austron 2100 loran

http://www.prc68.com/I/HaT.shtml and Austron stuff at: http://www.prc68.com/I/A2100F.shtml Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Dan Durgin wrote: > I have an Austron 2100F Loran-C clock receiver which works perfectly, but > the lcd readout is dead or

Re: [time-nuts] Exact Rubidium frequency

the 10 turn pot http://www.prc68.com/I/FTS4060.shtml <- C field step size near 1E-14, 3 digit thumb wheel. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Peter Vince wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] > > Ev

Re: [time-nuts] Exact Rubidium frequency

tweak the C field for the peak (dip?) and it will be on frequency. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Hal Murray wrote: >>I have also seen the frequency of a Hydrogen Maser given as both >>1,420,405,751 Hz and ...752 Hz. I would be very surp

[time-nuts] Troubleshooting SR DG435 Four Channel Digital Delay/Pulse Gen

appears. Connecting an external 10 MHz to the clock input and with the INT/EX switch in either position the same error is there. The on line manual does not have schematics. Any thoughts? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com

Re: [time-nuts] Troubleshooting SR DG435 Four Channel Digital Delay/Pulse Gen

Hi Bruce: The common pin has a 100 ns period wave at + and - 500 mv. One of the center pins on the INT/EX switch had + and - 1 volt at 100 ns period. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Dr Bruce Griffiths wrote: > Brooke Clarke wrote: > >>

[time-nuts] Watch Real or Fake?

the balance wheel. -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.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] more info on bad lcd readout on austron 2100F

Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Dan Durgin wrote: I did some more investigating over the weekend on my bad lcd on the 2100F Austron Loran unit. The LCD has 76 (!) pins, and appears to be soldered in place 8 digits with colons and +- signs can just b

Re: [time-nuts] Signature Block-

r web pages it takes a search to find it. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Ulrich Bangert wrote: > 1234 test > > Ulrich Bangert > [EMAIL PROTECTED] > Ortholzer Weg 1 > 27243 Gross Ippener > > > ___

Re: [time-nuts] Oncore VP problem

data. Not carrier phase, but is based on ranges and range rates to all the satellites. The other thing I've wondered about is how did HP correct the but in the early sawtooth error back when SA was on? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Cl

Re: [time-nuts] manual request: Austron 2201A

ble to the receiver. http://www.prc68.com/I/Q5200.shtml But how is a mystery. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rob Kimberley wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] > > Jamie, > > Have checked and hav

Re: [time-nuts] Active LF Antennas

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi Tom: Do you mean the AMRAD LF active antenna? http://www.prc68.com/I/LF-Ant.shtml Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Tom Clifton wrote: > Is the Doug Baker LF antenna still availa

Re: [time-nuts] manual request: Austron 2201A

been some special consideration that caused Quantic to use such a strange scheme. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rob Kimberley wrote: > Hi Brooke, > > Good to hear from you. > > The Austron 2029A used 10 MHz LO and a 75.42MHz IF. Pow

Re: [time-nuts] HP 5370B low frequency modulation

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hi Didier: Would you elaborate on the comment "Gold plated connectors are a well known example." Do you mean when soldered with Lead Tin solder instead of a silver bearing solder or something else? Have Fun, Brooke C

[time-nuts] LORAN-C Programmatic environmental Impact Statement (PEIS)?

.1D (related to Environmental Impacts). http://www.navcen.uscg.gov/loran/default.htm What gives? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.f

Re: [time-nuts] SMA Connectors was: HP 5370B low frequency modulation

made a big problem for satellite components which must use connector savers with a log of every connection and of course always done with a torque wrench. Are modern SMA connectors specified for more matings? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Didier J

[time-nuts] NTP Time Server Ping Timing Stability

r any given path would be quite small because of the quality of the timing? Or if I was pinged would the wander of the satellite in the link show up or is my stock PC so crude it swamps the satellite wander? 148.78.32.98 or 148.78.32.97 not sure if those are visible on the net. -- Have Fun, B

Re: [time-nuts] NTP Time Server Ping Timing Stability

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Hal: I'm in Califoria on the other side of the country from Atlanta, GA where the big dish is located. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Hal Murray wrote: > ); SAExi

Re: [time-nuts] NTP Time Server Ping Timing Stability

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY HI Poul: Thanks for the paper reference. The plots starting at Fig 6 answer my question. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Poul-Henning Kamp wrote: > In message <[EMAIL PRO

[time-nuts] HP E1938 Web Page

d all the images are way too coarse to be useable. Is there a way to convert it to something that can be read? http://www.prc68.com/I/HPE1938.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com ___ time-nuts maili

Re: [time-nuts] HP E1938 Web Page

oad a .hpg file. Maybe I need a plug-in? Autocad can drive an HP pen plotter to create .hpg files, but don't know about loading them. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Scott Newell wrote: > ); SAEximRunCond expanded to false > Errors-To:

Re: [time-nuts] HP E1938 Web Page

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Scott: Yes. Can it be read? How did you do it? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Scott Newell wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED]

Re: [time-nuts] HP E1938 Web Page

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: Scott will convert the files and I'll post them when they arrive. I've also added a Windows control program to the page. You may need to force a reload to see the new items. Have Fun, Brooke Clarke http://www

Re: [time-nuts] HP E1938 Web Page

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Rex: Too soon to say. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com Rex wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > On Tue, 28 Aug 2

[time-nuts] Why 7 Day Week

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: While surfing I came across this: http://www.ac.wwu.edu/~stephan/Astronomy/7day.html -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com ___ time

Re: [time-nuts] Fwd: FAASafety.gov - General Information "Termination of 121.5 MHz Beacons fo...

quickly confirm if it's a real emergency. The fancier versions have built in GPS. A year or more ago a hiker was saved by one of the 406 MHz beacons. I would hope to see a rental business at national parks were hikers disembark on long treks. Have Fun, Brooke Clarke http://www.PRC68.com

[time-nuts] [OT] Why did HP use a non standard connector on the 8411 Converter

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: Does anyone on this list know why HP used a non standard connector to join the 8411 harmonic frequency converter to the 8410 network analyzer? -- Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] [OT] Why did HP use a non standard connector on the 8411 Converter

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi John: Is there a reason to not use the standard "D" series connectors that can have coax connectors along with the normal contact pins? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.c

Re: [time-nuts] [OT] Why did HP use a non standard connector on the 8411 Converter

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Thanks John: Makes sense. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com John Day wrote: > At 02:40 PM 9/11/2007, you wrote: > >>Is there a reason to not use the standard "D&q

Re: [time-nuts] HP E1938 Web Page

ctrum analyzers" along with links to related app notes, etc. http://www.thegleam.com/ke5fx/gpib/readme.htm <- tool kit http://www.thegleam.com/ke5fx/gpib/pn.htm <- Phase Noise Overview Have Fun, Brooke Clarke http://www.PRC68.com http://www.pr

Re: [time-nuts] HP E1938 documents

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Jeffrey: I've posted the jpg versions and taken down the gifs. http://www.prc68.com/I/HPE1938.shtml You may need to to see E1938pdfdocs.zip Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisioncloc

Re: [time-nuts] Is this off topic?

ng time. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Bill Hawkins wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Thursday night I went to see Jame

Re: [time-nuts] HP phase-noise measurement seminar coursebook

ded your Phase Noise software but have not yet tried it out on my 4395A. http://www.prc68.com/I/4395A.shtml I think all that's needed is to enter 0 dB into the Noise Response window instead of the +2.5 db for a peak detector and -0.5 db for RBW correction needed for analog SAs. Have Fun, Brook

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

e no units indicators to cause confusion. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam CHazlitt wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Hello,

Re: [time-nuts] E1938

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Rick: If the aging drift is up in frequency then there might be an advantage in starting at the low end of the window. Any idea of how these age? Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] E1938

66.com/%7Eshera/index_fs.htm Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Rick Karlquist wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > This

Re: [time-nuts] Brooks Shera

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Peter: The code on that page is for the divider that Tom did in a PIC. It's not the Shera GPSDO. http://www.prc68.com/I/PRC68COM.shtml#TVB Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com

Re: [time-nuts] Austron 2000C on EBay

;t see the analog meter and mechanical switches instead of the pushbuttons and LCD. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Don Johnson wrote: > ); SAEximRunCond expanded to false > E

Re: [time-nuts] HP 523B frequency counter & Sputnik

ml#Sputnik Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Tom Van Baak wrote: > > A little known piece of Sputnik history... > > http://www.hparchive.com/Journals/H

Re: [time-nuts] HP 523B frequency counter & Sputnik

nd of Universal Coordinated Time (USNO)." Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Tom Van Baak wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > >

Re: [time-nuts] Improving the stability of crystal oscillators

dback circuitry. This was done for the HP E1938 10 MHz oscillator, see: http://www.prc68.com/I/HPE1938.shtml and the paper: The Theory Of Zero Gradient Crystal Ovens, R.K. Karlquist, L.S. Cutler, E.M. Ingman, J.L. Johnson, T. Parisek Have Fun, Brooke Clarke, N6GCE http://www

Re: [time-nuts] Improving the stability of crystal oscillators

resistance back to temperature. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam [EMAIL PROTECTED] wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > &

Re: [time-nuts] Improving the stability of crystal oscillators

ipedia.org/wiki/Clapp_oscillator In the 1930s GR patents he's showing an inductor in series with the crystal and Wiki dates the "Clapp Oscillator" 1948 where a capacitor is in series. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com

Re: [time-nuts] Improving the stability of crystal oscillators

them to work. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Don Collie wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Has anyone concidered usin

[time-nuts] Improving the stability of crystal oscillators

emperature sensors on the copper and aluminum. If the thermal time constant could be made very close to 24 hours, or integer multiples of that, it might be possible to predict the inner temperature allowing compensation. Has this already been done? -- Have Fun, Brooke Clarke http://www.PRC6

Re: [time-nuts] Improving the stability of crystal oscillators

es. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Bruce Griffiths wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Brooke Clarke wrote: > >&g

Re: [time-nuts] Improving the stability of crystal oscillators

must have just used the long time constant to slow down the changes, or was he actually using the time of day as a function of frequency? Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Rich

Re: [time-nuts] Improving the stability of crystal oscillators

Hi Bruce: Details on your experiment please. Hole/pipe diameter, material? Depth? Delta T at different depths vs surface ambient? Soil type? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Bruce

Re: [time-nuts] Improving the stability of crystal oscillators

ity where I am. The Wisconsin data was in loam which I think means a fairly good insulator. They had the widest temperature variation (15 c delta @ 120 cm down). I've got sand and clay after the first foot or so which may be a better thermal conductor implying less variation. Have

[time-nuts] Info Wanted on O-1814/GRC-206 Rubidium Frequency Standard

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: I've received this unit, but know nothing about it. Need power connector voltages and pinout, manual or whatever I can find out. O-1814/GRC-206 Rubidium Frequency Standard -- Have Fun, Brooke Clarke http://www.

Re: [time-nuts] Info O-1814 Rb Freq srd

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Nigel: Thanks very much for that link. I'm even more impressed by the M-100 Rb. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astr

[time-nuts] Time Interval Counter by Standard Electric Time Co

d before, maybe in a movie or documentary. Still looking for info on the O-1814/GRC-206 Rb source and it's Efratom M100 Rb brick. see: http://www.prc68.com/I/O1814.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.sh

[time-nuts] Scopes and 1 PPS signals?

a narrow pulse to be measured that don't cost an arm and leg? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam ___ time-nuts mailing list -- t

Re: [time-nuts] Scopes and 1 PPS signals?

faster than the main trace which would be 20 ms/sq, way too slow to see the pulse. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Alan Melia wrote: > ); SAEximRunCond expanded to false > Err

Re: [time-nuts] Scopes and 1 PPS signals?

el that would allow you to see it on the scope. > > BillWB6BNQ > > Brooke Clarke wrote: > > >>Hi: >> >>While trying to figure out the O-1814 Rb source I found a 1 PPS signal that's >>less than 10 us wide. But using an HP 54501A DSO it'

Re: [time-nuts] Scopes and 1 PPS signals?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Daun: The previous message suggested using a 74123 one shot, and the FatPPS uses a 74HC123. But $45 seems a bit high for just this measurement. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com

<    5   6   7   8   9   10   11   12   >