Re: [time-nuts] Replacing electrolytics - any disadvantages of high temp ones?
On Fri, 24 Jun 2011 11:11:34 -0700, GMail / AnalogAficionado analogaficion...@gmail.com wrote: Sorry to perpetuate the OT discussion, but there is an excellent series of articles by capacitor design engineer Cyril Bateman called Understanding Capacitors, published in EWWW magazine in the late '90s. The article on electrolytics covers almost anything you might want to know about them, and is a very worthwhile read. I highly recommend the whole series. Cyril had the articles posted on his own website some time ago, which I can no longer find. But, they are still available online if you search around. - Chad. . This site has links to many of Cyril Bateman's articles, including the EW series on capacitors. http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6t=153start=2 -- kc0ukk at msosborn dot 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] latest on the lightsquared 'saga'
Mike, The saw filter is between the antenna and the LNA. You're correct as to the sensitivity measurement; it is -146 dBm acquisition and -159 dBm tracking. It also specs 1PPS accuracy of 22ns, 1 - sigma. Here is a link to the data sheet: http://www.ilotus.com.sg/sites/all/themes/zeropoint/pdf/tx/TX%20Oncore%20-%20TDS%20(Ver%203.5.0).pdf On Tue, 8 Mar 2011 07:33:38 -0500, Mike Feher mfe...@eozinc.com wrote: That sounds neat. My recollection of SAW filters from many moons ago is that they have a fair amount of insertion loss. One always has to consider trade-offs. Do you know if it is placed after the antenna and before the LNA, or, is it after the LNA? Also, you probably meant -159 dBm of sensitivity, and, I expect that is on a one Hz basis. 73 - Mike Mike B. Feher, EOZ Inc. 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 office 908-902-3831 cell -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Matt Osborn Sent: Monday, March 07, 2011 2:59 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] latest on the lightsquared 'saga' iLotus has the new TX Oncore timing receiver with a built in saw filter and -159db sensitivity. Has anyone had a chance to put it through its paces? -- kc0ukk at msosborn dot 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 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. -- kc0ukk at msosborn dot 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] latest on the lightsquared 'saga'
iLotus has the new TX Oncore timing receiver with a built in saw filter and -159db sensitivity. Has anyone had a chance to put it through its paces? -- kc0ukk at msosborn dot 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] On Finding Things
On Sun, 8 Aug 2010 02:38:53 +1200, Steve Rooke sar10...@gmail.com wrote: Well, that does make a lot of sense, it's just a pity that searching for the item you want frequently ends up fruitless but I agree that if you search for anything, your sure to find it. Senior moments are lifesavers; after a few moments I've forgotten what is was I was looking for and there it is. Of course, I've also forgotten why I was looking for whatever it was and my interests take a possibly new turn. Keeps life fresh. -- kc0ukk at msosborn dot 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] Symmetricom 5115A Phase Noise Allen Deviation Test Set on ePay
On Tue, 6 Apr 2010 19:58:14 +1200, Steve Rooke sar10...@gmail.com wrote: Time to check under the lounge suite cushions for that spare change :) 230458691424 I really like his 'Floopy Drives'. -- kc0ukk at msosborn dot 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] Thermal time constant
Jack Smith at Clifton Laboratories built a replacement for the 1502 chart recorders. An early prototype can be seen here: http://www.cliftonlaboratories.com/mar_2007.htm On Thu, 11 Mar 2010 04:51:00 +, Mark Sims hol...@hotmail.com wrote: Gawd, tell me about it... I just got through rebuilding the drive roller in half a dozen Tektronix YT-1 and YT-1S chart recorders for the 1502B/1520C/1503B/1503C TDR's -- kc0ukk at msosborn dot 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] Wrist Watch for Time Nuts
On Wed, 24 Feb 2010 12:03:32 -0500, Bob Camp li...@rtty.us wrote: Hi A square foot of solar cells fashioned into geek stylish hat would keep it running for quite a while. - Has anybody actually poked at one of these yet? Bob The MSP430F5438 combined with a Zarlink ZL70250 RF transceiver http://www.zarlink.com/zarlink/hs/82_ZL70250.htm is an unbeatable combination for low power consumption. The 'A' version of the MSP430 offers even better performance when released. The MSP430 controls and samples up to 1500 12 samples per second from multiple analog inputs while sleeping 750 msec out of each second. The Zarlink offers two way communications (keeps the device synced with the PC). The data transfers are managed by the MSP430 DMA through an SPI port to the Zarlink. We should end up with 1 milliamp current draw at maximum throughput of 3000 bytes per second. -- kc0ukk at msosborn dot 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] Loran C sounds
A hog driver and time-nut; heck of a combination. I kept my feet on the ground back in the '60s. but always had my spirits lifted when Spooky showed up. Heard you guys flew the wings off those planes. Boeing is replacing all 242 wing sets for another 20 years of service. Thanks for your service, Peter. On Fri, 12 Feb 2010 07:29:39 -0800, Peter Putnam pico.2...@sbcglobal.net wrote: My A-10 aircraft -- kc0ukk at msosborn dot 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] Strange event on my Z3805A [REVISED to correct links]
I've seen similar results when the receiver switches satellites. Multipath?? On Mon, 1 Feb 2010 23:43:01 +1300, Steve Rooke sar10...@gmail.com wrote: Seems that things have started to return to some normality but variations in the EFC are very high. The status line from the unit as reported shows everything is OK and it's tracking 7 sats. Trace of proceeding 60h from current time 1st Feb 10:30 UTC http://homepages.slingshot.co.nz/~sar10538/GPSCon_export_current_60h.png Steve -- kc0ukk at msosborn dot 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] Strange event on my Z3805A [REVISED to correct links]
Steve, I'm much more wizened than wise, but my understanding is that crystal jumps do not come back. They stay at their new frequency. I did notice on your graph of the event that there were changes in the sat. constellation at the beginning and end of the anomaly. I've seen similar moves on both my Thunderbolt and Fury GPSDOs. All seem to be related to satellite switching. One was so repetitive I was able to identify the offending satellite. On Tue, 2 Feb 2010 15:00:50 +1300, Steve Rooke sar10...@gmail.com wrote: On 2 February 2010 11:11, Matt Osborn kc0...@msosborn.com wrote: I've seen similar results when the receiver switches satellites. Multipath?? It does that all the time as sats come in and out of view but I've never seen an event of this magnitude before. If you look at the trace for the preceeding 36h you can see peaks where the unit switches stats but those peaks are decades less than this peak. I also see that the EFC voltage changes very significantly, is this perhaps one of the infamous crystal jumps we have spoken about I wonder. The area of interest is that it appears somewhat unstable after the event but is improving now. Multipath, I don't think so as nothing has changed here and I live in an urban area well outside the city. Nothing has been errected or changed as far as I can see. Cheers, Steve -- kc0ukk at msosborn dot 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] Motorola M12+T - On board oscillator phase noise spec and/or part number
The crystal on my M12+T is marked top to bottom: 32.768 KDS0530 I would imagine it is a custom device from KDS http://www.kds.info/index_en.htm On Tue, 23 Dec 2008 11:06:30 +0200, Stephan Sandenbergh step...@rrsg.ee.uct.ac.za wrote: Hi All, Has anyone been able to figure out the part number and/or measured the phase noise of the quartz oscillator on board the Motorola M12+T? -- kc0ukk at msosborn dot 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] DMTD mixer question
Thanks for the info. I saw the development system for $149 and thought the exposure would be worth the price if the exposure lasted more than 60 days. Webpack sounds as if it will do the job. On Fri, 26 Dec 2008 23:38:02 -0800, Hal Murray hmur...@megapathdsl.net wrote: Webpack is good enough to get a lot of work done. You might want some of the fancier features. You probably don't want to pay for ISE if all you are doing is hobby stuff. -- kc0ukk at msosborn dot 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] DMTD mixer question
On Sat, 06 Dec 2008 02:54:48 +1300, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote: At least a couple of us have the Spartan 3E board. Is the ISE evaluation software time limited? -- kc0ukk at msosborn dot 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] GPSDO recurring Time Interval aberation
I've been tracking my Fury GPSDO (ROM version 1.21) equipped with an Isotemp OXCXO134-10 oscillator for a couple of weeks now and have noticed that the Time Interval (TI) spikes around 20 to 40 nsec everyday at 17:45 UTC (11:45 AM CST local time). There are minor spikes (5 nsec) every 2 to 3 hours, but I find the large spikes to be very curious. The oscillator itself has no idea of the time of day (does it?), the Fury generated EFC follows the spike and brings the TI back into line within tow or three minutes. There are no unusual charges to the EFC prior to or after the spike. I've already tracked ambient temperature over several days and have seen nothing unusual. I'm going to monitor line voltage next. Has anyone else ever seen such behavior? -- kc0ukk at msosborn dot 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] M12+T more confusion
I'm not a Labview expert, but I've seen Labview do that with messages from other devices. Labview (or more likely, its programmer) has issues dealing with threading issues. On Fri, 21 Nov 2008 00:58:36 -0500, Norman J McSweyn [EMAIL PROTECTED] wrote: Gentlemen: Why would the M12+T swap the order of messages? I write @@Hn and @@Eq in that order to the board and it gives it back to me in reverse order. Tried @@Cf then resending the messages. Still the same. Then did it AND swapped the order of the messages. Still the same. The manual says it's first in, first out regarding the serial buffer. I'm using Labview 8. Norm n3ykf ___ 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. -- kc0ukk at msosborn dot 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] Jackson Labs Fury Isotemp OCXO134-10
I think that I've managed to keep a low profile here, trusting that I would learn more if I refrained from random interjections of ill-informed thoughts. However, there comes a point in every man's life... A year or two ago, I took advantage of Said's offer and purchased one of the Jackson Labs OEM external OCXO Fury units and am attempting to put it to work. I've decided to use an Isotemp OCXO134-10 oscillator and have several decisions which I would like to vet with those of you that have been down this road before. The Isotemp unit has an EFC range of 0 to 8 Volts; the Fury has an EFC range of 0 to 5 volts. Using my HP 53131A, I'm able to adjust the Isotemp to 10 MHz +- 5 mHz with an EFC voltage of 4.64 volts. That is within the adjustment range of the Fury, but I'm not sure of the accuracy of the HP53131A. Should I construct a resistive network ala Brooks Shera to 'boost' the EFC range just in case or would I be better off just using the Fury 'as is'? Secondly, the Jackson Labs advises that since the Fury uses the external oscillator as its clock, that the oscillator should be powered up before the Fury itself. I was hoping that I would be able to use a single power switch to power both the oscillator and the Fury simultaneously, but now I'm not so sure. Finally, are there any of you that have used the Isotemp OXCO134-10 with the Fury? Have any of you worked out the various SERVO settings that the Fury makes available? I'm interested in the DAC gain, EFC scale, EFC dampening and Phase compensation. Any and all advice will be gratefully accepted. -- kc0ukk at msosborn dot 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] SVN23/PRN32 useable
On Sat, 23 Feb 2008 09:59:46 +0100 (CET), Magnus Danielson [EMAIL PROTECTED] wrote: Hi! The SVN23/PRN32 will be set useable 2008-02-26T18:00:00Z. PRN 32 is being tracked here in Minneapolis, MN on a M12M-T. Looks good! -- kc0ukk at msosborn dot 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] SVN23/PRN32 useable
On Wed, 27 Feb 2008 09:33:48 +1300, Kiwi Geoff [EMAIL PROTECTED] wrote: I have tried to pick up PRN32 on various Garmin GPS's but I think it is just an almanac issue - may have to wait until tomorrow for those to work. My Garmin eTrex Vista is tracking PRN 32, so you're probably correct. -- kc0ukk at msosborn dot 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] SVN32 and GPS receivers, 32-bit limitations
On Sat, 9 Feb 2008 15:21:30 -0800, Tom Van Baak [EMAIL PROTECTED] wrote: My rash prediction is that no one is going to see SVN32 with an Oncore VP, M12, Thunderbolt, and maybe a few others. Then again, I wonder if things might magically improve in a week when they set it healthy. PRN32 shows up intermittently when performing a site survey with an iLotus M12M Timing receiver. It's never tracked and does not appear again after a position fix has been achieved. -- kc0ukk at msosborn dot 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] SVN32 and GPS receivers, 32-bit limitations
On Sat, 9 Feb 2008 21:13:24 -0800, Tom Van Baak [EMAIL PROTECTED] wrote: PRN32 shows up intermittently when performing a site survey with an iLotus M12M Timing receiver. It's never tracked and does not appear again after a position fix has been achieved. -- kc0ukk at msosborn dot com Cool. What tool or moto binary message did you use to see this? I used Motorola's WinOncore12 ver 1.2 on both 8 and 9 Feb 2008 with the same results. I did save a binary log file on 9 Feb. I intend to do another survey tomorrow night with SynTac (TAC32?) from CNS Systems Version 2.7.4 . -- kc0ukk at msosborn dot 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] 59501A GPIB D/A PRGRMR
These folks list manuals for the HP-59501A. They can be a bit spendy, but they are original manuals, not copies. http://yourmanualsource.com/ On Tue, 27 Mar 2007 18:44:28 +0200, Arnold Tibus [EMAIL PROTECTED] wrote: Hello the Time Nuts group, perhaps it is not the right place to look for such things, but I am searching already a long time, w/o any positive results, the user and as well the service manual for the HP-59501A GPIB D/A PRGRMR, a programmable DC-source . -- kc0ukk at msosborn dot com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Circuit diagram for Efratom FRK-HLN 5 Mhz oscillator board
These folks have one for sale, they may be able to help http://www.aptecelectronics.com/prod03.htm On Wed, 28 Feb 2007 21:25:39 +0100, Arnold Tibus [EMAIL PROTECTED] wrote: Hello Ulrich and hello Nigel (nice to meet you here as well!), I would like to help if possible, as I am owner of a FRK-HLN with 5 MHz output. I own as well a operation and maintenance manual for the FRK (H or L) , but I realized quite soon, that the content of my oscillator with 5 MHz is quite different as described and shown in am. manual, talking of the different 10 MHz circuits and boards, not mentioning the 5 MHz issue. I tried to find out the differences, but I stopped. Since then I am as well looking for the correct manual and circuits for the FRK-HLN-1A2B2A, EFRATOM Part No. 703-200-8 5 MHz. Nigel, of course I am interested to help and to exchange informations, I have anyway to answer your last letter. I wonder if somebody could help with the special issue of manual. greetings to all, Arnold, DK2WT On Wed, 28 Feb 2007 19:54:53 +0100, Ulrich Bangert wrote: Hi folks, please allow me to ask the group on behalf of the future member Nigel Allinson whether anyone has an schematic diagram of the 5 MHz low noise oscillator board that Efratom used in the HLN (!) version of the FRK. TIA Ulrich Bangert, DF6JB ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -- kc0ukk at msosborn dot com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
