Re: [time-nuts] Austron 2100 LORAN C manual I have a pdf!

Hello Paul, I wanted to say 'Thanks' - I downloaded that recently. I'm obviously interested in any Austron schematics; manuals; references; datasheets... . 73's, John AJ6BC On Thu, Jul 30, 2015 at 9:46 AM, paul swed wrote: > In looking at the threads and putting away the Austron catalog I re

[time-nuts] MTI-Milliren OCXO Issue

Hello All, Just wondering - has anyone made any recent purchases with MTI-Milliren regarding OCXO's? I've had a recent interaction with them that makes me think their OCXO's could go the way of the dinosaur; maybe it's just me; hoping someone on the list has some recent experience with MTI-Millir

Re: [time-nuts] Instrument BASIC

at 4:25 PM, John C. Westmoreland, P.E. < j...@westmorelandengineering.com> wrote: > Magnus, > > There's an outside chance a buddy of mine may know what to do - I will > check with him but no promises unfortunately. > > It could take a few days. > > The lib on SourceFo

Re: [time-nuts] Instrument BASIC

There are a lot of TCLs on sourceforge > Regards > Paul > WB8TSL > > On Sat, Feb 27, 2016 at 5:01 PM, John C. Westmoreland, P.E. < > j...@westmorelandengineering.com> wrote: > > > Magnus, > > > > I used to be responsible for a couple of labs in the late 90's e

Re: [time-nuts] Instrument BASIC

2016 at 3:17 PM, Magnus Danielson < mag...@rubidium.dyndns.org> wrote: > John, > > On 02/27/2016 11:01 PM, John C. Westmoreland, P.E. wrote: > >> Magnus, >> >> I used to be responsible for a couple of labs in the late 90's early >> 2000's >

Re: [time-nuts] Instrument BASIC

Magnus, I used to be responsible for a couple of labs in the late 90's early 2000's where we had several of these. First - do you have this option installed: Add Agilent Instrument BASIC 1C2 ? We automated the VSA's using GPIB and TCL. I jumped through some hoops to make the TCL library public

Re: [time-nuts] Springer textbooks >10 years old now available for download as PDF at no cost

Thanks Gregory! Happy 2016! John W. AJ6BC On Tue, Dec 29, 2015 at 5:42 PM, paul swed wrote: > Scott, > Thank you for sharing these with Time-nuts. > I have to say some good reading over the winter. > Regards > Paul > WB8TSL > > On Tue, Dec 29, 2015 at 3:16 PM, Scott Newell > wrote: > > > At 1

Re: [time-nuts] Loran C returning to a station near you...

Time-Nuts, Was better than 500 nS accuracy ever achieved with Loran? 73's, John Westmoreland AJ6BC On Tue, Jul 14, 2015 at 10:18 PM, Dale Cannon wrote: > Folks, > > > > I know that there is a longing for LORAN-C to return, but this weekend, I > did a Google Maps flyover of each of the US LORA

Re: [time-nuts] Any other useful purpose for Austron 2100F or SRS FS700 receivers in US

Hello Jim, Would you happen to have complete schematics for the Austron 2100F? 73's, John AJ6BC On Sat, Jul 11, 2015 at 2:38 PM, paul swed wrote: > They can be useful as a comparator between two references as long as you > have a LORAN C simulator to drive the system. > I built up a unit 3 ye

Re: [time-nuts] leap second video from NICT Japan

Hello Dikshie, Thanks for sharing this. Wow, not sure we had anything in the US that was comparable - crowd actually applauded. Best Regards, John W. On Sat, Jul 4, 2015 at 5:15 PM, dikshie wrote: > Hi, > This is leap second video from NICT Japan. > https://www.youtube.com/watch?v=p_VV7d3GEh

Re: [time-nuts] Ublox 6T receiver, noisy PPS.

Hello Dan, I have a LEA-6T running; have a nice external antenna, etc - it's been running for several days - I will check the 1PPS and report if I find anything like what you've discussed. Regards, John On Fri, Jan 16, 2015 at 4:03 PM, wrote: > Hi All, > > I've been playing a Ublox 6T re

Re: [time-nuts] gravity, space and time

Folkert, If we had a 'Time Quake' - would we even know? Regards, John W. On Fri, Dec 12, 2014 at 12:42 PM, folkert wrote: > > Hi, > > If I understood it well, we should occasionally encounter gravitational > waves going through, well, the whole galaxy. As time and space are > intertwined, thos

Re: [time-nuts] 1900kHz radiolcation testing on east coast US?

wrote: > Recorded last night. Audio bandwidth is a few kHz, but as mentioned before > the signal is about 20 kHz wide. > > https://www.dropbox.com/s/bnp8zcpgw86l6ww/1910.wav?dl=0 > > This morning (14:21 UTC) nothing is heard > > Frits W1FVB > Whitefield, NH > >

Re: [time-nuts] 1900kHz radiolcation testing on east coast US?

Hello, Can someone please post a *.wav file of what it sounds like provided you have an SDR set-up? If you need someplace to post - please send the file to me offlist and I'll put it on either an ftp site or http. I am not so convinced what I saw wasn't noise or some stations from China transmit

Re: [time-nuts] 1900kHz radiolcation testing on east coast US?

John AJ6BC On Mon, Dec 8, 2014 at 2:05 AM, John C. Westmoreland, P.E. < j...@westmorelandengineering.com> wrote: > Is the signal still there? > > I looked here on the West Coast - don't really see anything. > > Thanks, > John > AJ6BC > > > On Mon, Dec

Re: [time-nuts] 1900kHz radiolcation testing on east coast US?

Is the signal still there? I looked here on the West Coast - don't really see anything. Thanks, John AJ6BC On Mon, Dec 8, 2014 at 12:42 AM, Dr. David Kirkby (Kirkby Microwave Ltd) < drkir...@kirkbymicrowave.co.uk> wrote: > On 8 December 2014 at 07:24, Chris Wilson wrote: > > This is audible h

Re: [time-nuts] "GPS once a day issues" ?

Bob, You mean the Sun, correct? Regards, John On Oct 20, 2014 4:16 AM, "Bob Camp" wrote: > Hi > > Yes, but there’s this large object in the sky that modifies the ionosphere > as it travels in a “about one a day” track. It appears to be coming up just > about now, but I do need more coffee to b

Re: [time-nuts] LTE-Lite module

Said, What tool(s) did you use to generate that data and output the graph? Thanks, John On Fri, Oct 17, 2014 at 6:10 PM, S. Jackson via time-nuts < time-nuts@febo.com> wrote: > Jim, > > Here is the resulting 10MHz phase noise plot from the 20MHz TCXO output: > > > In a message dated 10/17/201

Re: [time-nuts] Lightning arrestors for GPSDO antenna

Hello Dave, I think we had a similar question recently - and I have been told the PolyPhaser products are gas tubes - I haven't opened one up yet. TESSCO sells these online - you can find them here: https://www.tessco.com/products/displayProducts.do?groupId=90143&subgroupId=91046 Regards, John W.

Re: [time-nuts] GPS jump

Hello Jim, I am just a novice here - but, when you say noticeable, can you please tell us how noticeable? What is a small downturn vs. a noticeable one? I just put up an outdoor GPS antenna. If there is anything I can do to possibly help, please give me instructions. I do not have direct access

Re: [time-nuts] WTB: GPS Antenna Splitter

ing > splitters are often less pricy than the HP/Agilent/Symmetricom/Microsemi > ones. > > -- > > Björn > > > Hi: > > > > This works great and has minimal cost. > > http://www.prc68.com/I/4GPS.shtml > > > > Have Fun, > > > > Brooke

Re: [time-nuts] WTB: GPS Antenna Splitter

Dave, Can you please let us know what you go with for your splitter choice? I noticed companies like EndRun Technologies use ones from these folks: http://gpsnetworking.com/GPS-antenna-splitters.asp TESSCO might stock those if you ask them. Regards, John W. On Mon, Oct 6, 2014 at 6:09 PM, Bob

Re: [time-nuts] Yokogawa TA320 Time Interval Analyzer

Hmm, I think they are Japanese: http://www.yokogawa.com/ydk/mr/marine/cs/ydkmr-ma-cs-contactus-top-en.htm Regards, John Westmoreland On Mon, Oct 6, 2014 at 4:14 PM, Dr. David Kirkby (Kirkby Microwave Ltd) < drkir...@kirkbymicrowave.co.uk> wrote: > I see this on eBay > > http://m.ebay.com/itm/220

Re: [time-nuts] Clock level conversion 5V -> 3.3V

Mark, Lots of good parts on this page: http://www.onsemi.com/PowerSolutions/parametrics.do?id=648 But as others are pointing out - it depends Regards, John On Tue, Sep 30, 2014 at 2:46 PM, Mark Haun wrote: > Is there a "best" way to do this without adding phase noise? For example, > a

[time-nuts] GPS-III

Hello All, Does anyone know yet of any companies that are making GPS-III receiver chip-sets/modules yet? Some web-sites on GPS-III: http://www.gps.gov/systems/gps/modernization/ http://www.gps.gov/systems/gps/modernization/civilsignals/ http://www.losangeles.af.mil/library/factsheets/factsheet.a

[time-nuts] OT?: Hittite to be bought by AD

Hello, Thought this could be of interest to some of you: Chipmaker Analog Devices to buy Hittite in $2 billion deal | Reuters Regards, John W. ___ time-nuts

[time-nuts] Maybe A Little Off Topic: connectBlue acquired by u-blox

Hello All, Thought this may interest some of you - I am certainly interested: http://www.u-blox.com/en/ad-hoc-releases/1659-u-blox-acquires-connectblue-adds-wi-fi-and-bluetooth-connectivity.html Best Regards, John W. ___ time-nuts mailing list -- time-

Re: [time-nuts] Phase noise and geomagnetism

Antonio, That is a great question. I am not 100% sure of the answer myself, but I am sure others will chime in. I used to be responsible for an RF lab in which we did a lot of low-noise measurements; had shielded racks, chamber, etc. - I can tell you from experience that anything that can raise

Re: [time-nuts] Japan / Time-Nuts

Tom, If you have time - you may visit New Japan Radio: http://www.njr.com/ 3-10, Nihonbashi Yokoyama-cho,Chuo-ku, Tokyo 103-8456, Japan TEL: + 81-3-5642-8222 / FAX: + 81-3-5642-8220 I believe there are people there that also deal or know those that know about vintage equipment in the area. Reg

Re: [time-nuts] more ADEV tools

Tom, Thank you for posting this. Regards, John Westmoreland On Mar 20, 2014 3:16 PM, "Tom Van Baak" wrote: > I wrote two new ADEV command line tools that some of you may be interested > in. > > adev4 calculates adev for a linear range, from tau to tau step tau. > adev5 calculates adev f

Re: [time-nuts] Another "atomic" clock question

David, Thanks - got it. Best Regards, John W. On Fri, Mar 7, 2014 at 10:53 PM, David J Taylor < david-tay...@blueyonder.co.uk> wrote: > Hello David, > > Not sure what is wrong here - I still can't reach it. > > If it isn't too much trouble - can you send me a screen shot off-list - I > can loo

Re: [time-nuts] Another "atomic" clock question

Hello David, Not sure what is wrong here - I still can't reach it. If it isn't too much trouble - can you send me a screen shot off-list - I can look up the patents as long as the numbers are listed. Thanks! John W. j...@westmorelandengineering.com On Thu, Mar 6, 2014 at 11:09 PM, David J Tay

Re: [time-nuts] Another "atomic" clock question

To the Mike that posted: http://www.pst.netii.net/patents.htm - I tried going to your site - can't reach it. Is the site operational? I wanted to take a look at your patents. Thanks, John Westmoreland On Thu, Mar 6, 2014 at 2:40 PM, Bob Camp wrote: > Hi > > In modern GPS modules the sawt

[time-nuts] Peregrine Ends Prescalers

Hello All, I just found out this last week that Peregrine has decided to EOL all of their prescalers. Thought that could be of interest to some in the group. Regards, John W. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https:

Re: [time-nuts] Software for Brilliant Instruments B1220?

Hello Richard, Do you mind telling us how far that set you back? I did a quick archive search - I found a post where Shalom stated the BI220 cost: *BI220 is $2,950* They are local to me - so I am going to check out this piece of equipment too - looks like a good/great choice for doing the perfo

Re: [time-nuts] ID this filter

Pete. I bet these guys can help: http://www.klmicrowave.com/filter-specifications.php Regards, John W. On Fri, Feb 21, 2014 at 3:21 PM, Pete Lancashire wrote: > > https://plus.google.com/u/0/photos/111617808980322733757/albums/5982995737892775185 > > Any have the specs ? > > -pete >

[time-nuts] Now For Something Completely Different...GPS Security

Hello Time Nuts, I thought this would be of interest to the group: http://www.ft.com/cms/s/0/fadf1714-940d-11e3-bf0c-00144feab7de.html Regards, John W. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/

Re: [time-nuts] Now For Something Completely Different...GPS Security

" Prof Last cited a report into navigation vulnerabilities* from the Royal Academy of Engineering* <http://www.raeng.org.uk/news/publications/list/reports/RAoE_Global_Navigation_Systems_Report.pdf>that found "there was barely a single area of commerce or industry in the UK that wasn'

Re: [time-nuts] MC100LVEL34

he software > didn't get rid of them all. > > You can assume they'll be reasonably flat past 1 MHz. That's as far as > those plots went. > > -- john, KE5FX > Miles Design LLC > > > > -Original Message- > > From: time-nuts-boun...@febo

Re: [time-nuts] MC100LVEL34

Hello John M., Thanks for the plot. Did you take that out past 1MHz - I assume it stayS 'flat' - maybe not. What explains that little spike at 10kHz for the AD9511? Interesting artifact. Thanks, John W. On Thu, Feb 6, 2014 at 12:44 AM, John Miles wrote: > (Different John here) Some quick

Re: [time-nuts] MC100LVEL34

Hello John, Did you happen to do any phase noise measurements? Thanks, John W. On Wed, Feb 5, 2014 at 10:07 PM, John Pease wrote: > > > > I was wondering how many of you have experience with this > > ECL part from On > > Semi: > >MC100LVEL34 ? > > John, > > I use this part quite a bit. Gre

[time-nuts] ECL Discussion: The On Semi MC100LVEL34 (/2/4/8 Prescaler/Divider)

Hello, I was wondering how many of you have experience with this ECL part from On Semi: MC100LVEL34 ? The url is: http://www.onsemi.com/PowerSolutions/product.do?id=MC100LVEL34 I did search the archive - via Google - last discussion I saw was the new clock distribution part from Linear regardin

Re: [time-nuts] high (spacial) precision GPS in Kickstarter

Hello Daniel, Appears that is precision for position - not necessarily time. I think NIST had a write-up on something very similar. Regards, John Westmoreland On Fri, Jan 24, 2014 at 5:40 PM, Daniel Mendes wrote: > > http://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-gps-receiver > >

Re: [time-nuts] Fwd: REQ: Manuals and Schematics for the Austron 2110

Max, Thanks for your reply. I have sent you an e-mail off list. 73's, John AJ6BC On Wed, Jan 22, 2014 at 8:04 PM, Max wrote: > On 23/01/2014 1:28 PM, John C. Westmoreland, P.E. wrote: > >> Hello Time Nuts, >> >> I hope everyone doesn't mind - I did get a fe

[time-nuts] Fwd: REQ: Manuals and Schematics for the Austron 2110

John Westmoreland -- Forwarded message -- From: John C. Westmoreland, P.E. Date: Sat, Dec 28, 2013 at 7:00 PM Subject: REQ: Manuals and Schematics for the Austron 2110 To: Discussion of precise time and frequency measurement Hello All, Does someone in the group have the manuals and schem

[time-nuts] sand9 TCMO

Hello All, I thought this may be of interest to the group - a start-up company - Sand9 - has developed a temperature controlled MEMS oscillator (TCMO): http://www.sand9.com/product/tcmo/ . Best Regards, John Westmoreland ___ time-nuts mailing list -- t

Re: [time-nuts] 'CPLDs for clock dividers' Thread

Hello Tom, Thanks for replying. I will be interested to see what you end up with for jitter, phase noise, and propagation delay; to name a few. Looks like an interesting part from the datasheet. Thanks, John W. On Sun, Jan 5, 2014 at 8:29 PM, Tom Minnis wrote: > I am working on a PLL design

Re: [time-nuts] 'CPLDs for clock dividers' Thread

Hello All, I was looking at the archives - what was the outcome of this: Thanks to everyone for their advice. I bought a CoolRunner II development board (only $39!) and will let you know how it goes. Matt On Wed, Feb 3, 2010 at 10:59 AM, Matt Ettus https://www.febo.com/cgi-bin/mailman/listinfo

Re: [time-nuts] From Burt - K6OQK...

Hello Burt, Yes - we also wish good health and much contentment in the New Year to you as well and to our fellow time-nuts! 73's and 88's as they apply!, John & Audrey AJ6BC On Mon, Dec 30, 2013 at 10:28 PM, Burt I. Weiner wrote: > Gang, > > Best wishes to all for good health and much conte

[time-nuts] REQ: Manuals and Schematics for the Austron 2010B

Hello time-nuts, Another request - does someone in the group have the manuals and schematics for the Austron 2010B - disciplined frequency standard? Thanks and Happy New Year! John Westmoreland ___ time-nuts mailing list -- time-nuts@febo.com To unsubsc

Re: [time-nuts] REQ: Manuals and Schematics for the Austron 2110

ll. > I will have time to scan it in a couple of days. > > Christmas greetings from Norway! > > - Harald > > P.S. I have been a long time lurker on the time-nuts list, but I believe > this is my first useful contribution :-) > > -Opprinnelig melding--

[time-nuts] REQ: Manuals and Schematics for the Austron 2110

Hello All, Does someone in the group have the manuals and schematics for the Austron 2110 - microprocessor controlled disciplined frequency standard? A lot of the Austron manuals are on the 'net - but I cannot find the one for the 2110 (yet). Thanks In Advance! John W. __

Re: [time-nuts] Austron

Hello Thomas, Yes - I was aware of that. And there is another company in there too I think - EndRun Technologies. Someone from that company told me about Austron. I am hoping someone on this list was employed by or worked for Austron. Thanks, John Westmoreland On Thu, Dec 26, 2013 at 10:41 P

[time-nuts] Austron

Hello Time-Nuts! I hope everyone is enjoying their Holiday Season! I have a question - I have been doing a little research lately on the company that used to be in Austin, TX - Austron - they seemed to have filed quite a few patents in areas of interest to our group. Here's one just as an exampl

Re: [time-nuts] Future of Time splinter meeting atAmericanAstronomical Society

Hello All, I read some of the material. Some of it makes it sound that the proposal is so earth-shattering and mind-bending that no mere mortal can understand what it means. So, are they talking about basing it off of a physical phenomena, like one of the atomic clocks at NIST or something like

Re: [time-nuts] national nc2001 atomic clock on eBay

I do like the name "Atomichron NC 2001" - pretty cool name for something made in 1954. I agree - before I would buy it I would have to see some shots of the innards. I think the seller did himself a misservice by not putting it in a more orderly location before posting that picture. Regards, Jo

Re: [time-nuts] Off Topic Sortof: Board Rework Stations

t; > > >On Thu, Nov 14, 2013 at 4:33 PM, Bob Camp wrote: > > > > > > > Hi > > > > > > > > If you look at the eBay listings they mention in some of them that > what > > > > they are selling is "without lenses". My impres

Re: [time-nuts] Off Topic Sortof: Board Rework Stations

k at the eBay listings they mention in some of them that what > they are selling is “without lenses”. My impression was that you needed to > focus the IR (like with a lens) to really get it to work well. I did not > dig far enough to sort that part out. > > Bob > > On Nov 14,

Re: [time-nuts] Off Topic Sortof: Board Rework Stations

. > > You will need to practice on a few scrap boards before you try to solder > something valuable. In the hands of a skilled operator, it does beautiful > work. > > --- Graham > > == > > > On 11/13/2013 9:00 PM, John C. Westmoreland, P.E. wrote: > >> Hello

[time-nuts] Off Topic Sortof: Board Rework Stations

Hello All, I was wondering if anyone on this list has used the T862++ rework stations on the PCB's you work on - http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dtools&field-keywords=t862%2B%2B&rh=n%3A228013%2Ck%3At862%2B%2B Are these as good as advertised? Thanks In Advance, John West

Re: [time-nuts] Trimble 34310-T EFC Question

Hello Bob, If you think you are getting any high frequency into the EFC control - it may be worth putting a(nother) low-pass filter in there. Are you measuring noise on that line? Do you have a snap-shot of a schematic? Or, can you take a picture of that circuit? I would hazard a guess you don

Re: [time-nuts] video of CSAC GPSDO

higher available Cesium > reference > > though, and not much more than some used decades-old functional FTS > Cesiums > > selling on Ebay. Please call the office for quotes on CSAC units. > > > > Thanks, > > Said > > > > On Nov 4, 2013, at 17:27, &

Re: [time-nuts] Thunderbolt tuning DAC theory of operation

Stu, I read this basically when it was posted. I would like to thank you for posting this. The theory on how to discipline an OXCO is something that I want to learn more about - and posts like this help with that a lot. So, thank you Stu - much appreciated! Best Regards, John Westmoreland On

Re: [time-nuts] video of CSAC GPSDO

publicly :) > > About one tenth of the price of the next higher available Cesium reference > though, and not much more than some used decades-old functional FTS Cesiums > selling on Ebay. Please call the office for quotes on CSAC units. > > Thanks, > Said > > On Nov 4, 2013,

Re: [time-nuts] video of CSAC GPSDO

Said, How much do the CSAC's run? Thanks, John Westmoreland On Mon, Nov 4, 2013 at 5:14 PM, wrote: > Hello, > > fyi KF5OBS did a nice video review of the CSAC GPSDO (and Lecroy high end > scope) that's posted on Youtube now: > > > http://www.youtube.com/watch?v=CogN630jUSs&feature=c4-overv

Re: [time-nuts] Surface Mount OCXO Questions

f other transceivers in the trunk of a > police car - with 40A of > lights flashing, etc.) > > Bob LaJeunesse > > > > > > From: "John C. Westmoreland, P.E." > >To: Discussion of precise time and frequency measurement

Re: [time-nuts] Surface Mount OCXO Questions

easier to get the full performance out of the part with a 12 Volt power > feed > than a 3 Volt power feed, not that you can't get full performance with a > 3.3V feed. > > I am sure their parts meet specs, you just need to understand them. > > P.S. - I would stick with linea

Re: [time-nuts] GPSDO choices

Dave, I have an LC_XO and a GPSDO, both from Jackson Labs. There are more than just a few of us also that are a part of the OpenHPSDR effort that have evaluated the units (GPSDO) for over 1 year now (I have a project that is a bit overdue...but that is another story...) But, I haven't seen one s

Re: [time-nuts] Surface Mount OCXO Questions

ell not have > designed it in ….. > > Bob > > On Oct 30, 2013, at 8:37 PM, John C. Westmoreland, P.E. < > j...@westmorelandengineering.com> wrote: > > > Graham and Time Nuts, > > > > (thanks for the answers.) > > > > I have another question -

Re: [time-nuts] Surface Mount OCXO Questions

some require an open thermal hole underneath > the oven. I have seen all three cases. As usual, it is suggested that you > read the [] manual. > > Best regards, > --- Graham / KE9H > > == > > > > On 10/29/2013 9:18 PM, John C. Westmoreland, P.E. wrote: > >> Hello

[time-nuts] Surface Mount OCXO Questions

Hello, I was wondering if I could get some recommendations on surface mount OCXO's vs. the traditional through hole. I was also wondering on the board layout - if you found it necessary to leave a thermal moat so to speak - and what worked best. Maybe the OCXO has an internal air barrier that ma

Re: [time-nuts] Anyone Know What The Models Were In This NIST Paper?

land On Tue, Oct 29, 2013 at 6:31 PM, Bob Camp wrote: > Hi > > That’s always one of those “we can only tell you if you work for the US > government” sort of things. If anybody knows it’s one of those “you better > not tell” things. > > Bob > > On Oct 29, 2013, at 8:4

Re: [time-nuts] Trimble Mini-T

; of space either. I was just curious. > > Thanks, > John > > > > On Tue, Oct 29, 2013 at 4:55 PM, Bob Camp wrote: > > > Hi > > > > I believe they were not making enough of them to make it worth > continuing > > production. > > >

[time-nuts] Anyone Know What The Models Were In This NIST Paper?

Hello, Does anyone know what Models A, B, C, and D were in this paper? Or maybe had a good idea? http://www.nist.gov/customcf/get_pdf.cfm?pub_id=50196 Thanks! John Westmoreland ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to htt

Re: [time-nuts] Trimble Mini-T

oduction. > > Bob > > On Oct 29, 2013, at 7:30 PM, John C. Westmoreland, P.E. < > j...@westmorelandengineering.com> wrote: > > > Hello, > > > > I was talking to a distributor here in San Jose and they told me the > > Trimble Mini-T is no longer availa

Re: [time-nuts] GPS time module

Thanks for the comparison Said. I am glad I have an LC_XO. ;) Regards, John Westmoreland On Tue, Oct 29, 2013 at 4:35 PM, wrote: > Sorry in advance guys, > > I could not resist doing a short comparison between our LC_XO module and > this new Selig/RF-Suisse 1x1 module. Please excuse this bl

[time-nuts] Trimble Mini-T

Hello, I was talking to a distributor here in San Jose and they told me the Trimble Mini-T is no longer available. Does anyone on this list know why Trimble decided to stop making it? The distributor doesn't know. Thanks, John Westmoreland ___ time-nu

Re: [time-nuts] 3-D GPS antenna?

Peter, I took a look at the article - interesting and thanks for posting the link. Regards, John Westmoreland On Wed, Oct 9, 2013 at 2:11 PM, Peter Gottlieb wrote: > http://www.technologyreview.**com/news/519811/a-cure-for-** > urban-gps-a-3-d-antenna/

Re: [time-nuts] GPSDO choices

Oct 7, 2013 at 9:15 PM, Paul wrote: > On Mon, Oct 7, 2013 at 8:01 PM, John C. Westmoreland, P.E. > wrote: > > I didn't realize the issue here was the BNC connector and your dislike of > > the MMCX style connector that is pretty much a standard for passive GPS > >

Re: [time-nuts] Detecting GPS and other jammers

Bob, I think what you have pointed out is interesting - I have even given it more than a passing thought on how to design what is on the CellBusted site. I am working on a design of my own on how to detect low-power RF signals using a wide-band method of detection. 73's, John Westmoreland AJ6BC

Re: [time-nuts] GPSDO choices

f-the-line equipment, so soldering/rework to me is almost a way of life. Best Regards, John Westmoreland On Mon, Oct 7, 2013 at 6:28 PM, Paul wrote: > On Mon, Oct 7, 2013 at 2:52 PM, wrote: > > Paul, > > try the Jackson Labs GPSTCXO eval kit. > > On Mon, Oct 7, 2013 at 5:5

Re: [time-nuts] GPSDO choices

Paul, I can speak for a few of us over in the OpenHPSDR group that are also 'time-nuts' - We have the GPSTCXO eval kit that Said is speaking of and we have been very satisfied. It is a great fit for what we're doing. We are working on a new board now that is near completion that can either have

Re: [time-nuts] Clock Driver Design

Hal, > SN74LVC1G125 - Single Bus Buffer Gate with 3-State Output TI does all of their testing: f = 10MHz for the chip - that is in the datasheet. If you drive it too hard, expect it to drive too much capacitance, etc - yeah - the voltage waveform will suffer. But, using it within the spec - I t

Re: [time-nuts] Clock Driver Design

Tom, OK - one question for now if that is OK - your video amp - is it base-band or broadband? Regards, John W, On Thu, Sep 26, 2013 at 11:11 PM, Tom Minnis wrote: > Thanks for all your thoughts on the subject. Let me play back what I have > learned and how it may apply to my challenge. One

Re: [time-nuts] Clock Driver Design

Bob, Totally agree. 24mA of drive at 3.3V is pretty nice in a small footprint for the parts we are discussing. Of course as you have pointed out you can drive them at 5V too. Mini-circuits is a good place to look too - especially for us hobbyists: http://www.minicircuits.com/products/DesignerK

Re: [time-nuts] Clock Driver Design

Tom, If you are building your own board - I have used this part: SN74LVC1G125 - Single Bus Buffer Gate with 3-State Output and it is suitable for the job. I have measured the performance of the logic family - and what I observed follows what is in the spec sheets from TI. I did not officially

Re: [time-nuts] JL LC_XO Performance

oduct). > > > http://jaunty-electronics.com/blog/2012/10/review-jackson-labs-gpstcxo-eval-board/ > > Hope that helps, > Said > > On Sep 20, 2013, at 16:42, "John C. Westmoreland, P.E." < > j...@westmorelandengineering.com> wrote: > > > Bob, &g

Re: [time-nuts] Leap second smear at Google

Christopher, Obviously GOOG needs a time-nut on their staff! Interesting stuff! John W. On Fri, Sep 20, 2013 at 6:48 PM, Christopher Quarksnow wrote: > Besides the famous Android stint described in Google bug 5485 > https://code.google.com/p/android/issues/detail?id=5485 that took 2 years >

Re: [time-nuts] JL LC_XO Performance

Bob, Oh yes - but he would want to refrain from comment I would think. Regards, John On Fri, Sep 20, 2013 at 4:31 PM, Bob Camp wrote: > Hi > > I'd bet that Said has seen a few of them ….. > > Bob > > On Sep 20, 2013, at 6:37 PM, "Jo

Re: [time-nuts] JL LC_XO Performance

So, I take it no one has looked at these units yet? Thanks, John Westmoreland On Thu, Sep 19, 2013 at 7:51 PM, John C. Westmoreland, P.E. < j...@westmorelandengineering.com> wrote: > Hello All, > > I just spoke with JL - I should have one of the Jackson Labs' LC_XO's

[time-nuts] JL LC_XO Performance

Hello All, I just spoke with JL - I should have one of the Jackson Labs' LC_XO's in my hands soon (TCXO option) - I was wondering if any of you have had a chance to look at it - and what your opinion is of the unit? If you have taken any detailed measurements you would like to share - that will b

Re: [time-nuts] GPSDO vs Rb standard

Azelio and Fellow Time Nuts, Isn't the GPS 1PPS signal supposed to be 'precise' to within what error? I imagine this is in the specs of the specific receiver - but I was wondering if some of you have actually measured what that is - and could report the numbers that you have found. Thanks! John

Re: [time-nuts] Req: Decent GPS AntennaActive/Passive Recommendation

Thanks Jim. Best Regards, John W. On Mon, Sep 16, 2013 at 9:25 PM, Jim Lux wrote: > On 9/16/13 6:43 PM, John C. Westmoreland, P.E. wrote: > >> Hello Everyone, >> >> While we're on the subject - not to get too far off on a tangent - I have >> been doing '

Re: [time-nuts] Req: Decent GPS AntennaActive/Passive Recommendation

Hello Everyone, While we're on the subject - not to get too far off on a tangent - I have been doing 'web-research' on this - but can someone recommend a great site or reference for the specifications of the GPS signaling sent down by a GPS satellite? For instance, I learned that PPS for a milita

Re: [time-nuts] Req: Decent GPS AntennaActive/Passive Recommendation

Hello Everyone, Thanks for the feedback - I certainly have a lot to think about. Seems eBay could be a preferred vendor for antennas. I don't need anything too fancy - but I would like something that does OK in wind and rain, I don't have to worry too much about snow at my current location - and

Re: [time-nuts] Req: Decent GPS Antenna Active/PassiveRecommendation

Hello David, The polar orbiting APT antenna looks interesting. Thanks again for the pics! And - I know your call sign now too! 73's, John AJ6BC On Sun, Sep 15, 2013 at 2:14 AM, David J Taylor < david-tay...@blueyonder.co.uk> wrote: > Hello David, > > Thanks for the pic! > > Well, I need some

Re: [time-nuts] Req: Decent GPS Antenna Active/Passive Recommendation

Hello David, Thanks for the pic! Well, I need something that I can put outside, in the weather, with my verticals, and other antennas. I am a Ham radio enthusiast, and I want something I can properly mount and can be an all-weather device and can live happily 'in the farm' so to speak. I should

[time-nuts] Req: Decent GPS Antenna Active/Passive Recommendation

Hello Time Nuts, I hope this isn't too off topic. Can I please have some recommendations for a decent active or passive GPS Antenna to add to the antenna farm that doesn't break the ole' piggy bank? Thanks In Advance, John Westmoreland ___ time-nuts ma

Re: [time-nuts] GPS outage?

Fellow Time Nuts: Is this a site to be trusted?: http://adn.agi.com/SatelliteOutageCalendar/SOFCalendar.aspx Regards, John W. On Fri, Sep 6, 2013 at 6:41 PM, John C. Westmoreland, P.E. < j...@westmorelandengineering.com> wrote: > Lisa, > > Thanks for this update. How ma

Re: [time-nuts] GPS outage?

Lisa, Thanks for this update. How many Resolution-T receivers are out there? Not to go off on another tangent - but I have heard something about 'GPS jamming during the America's Cup'. Hmmm. Regards, John Westmoreland On Fri, Sep 6, 2013 at 8:54 AM, Lisa Perdue wrote: > Trimble has confir

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