Re: [time-nuts] GPS Timing Antenna Failure - Long

PCBs caused by trace contaminants and dendrite growth. A PCB with sustained flame is shown, powered by a lithium coin cell -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Ange

Re: [time-nuts] GPS Timing Antenna Failure - Long

/13/2018 6:42 PM, Hal Murray wrote: I can't count the number of times flux and whisker growth has caused problems in circuitry and connectors. A whisker might explain things. Would that also show up as over-current? ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of L

Re: [time-nuts] GPS Timing Antenna Failure - Long

tps://www.datamatik.no/media/produkt/gps-4.pdf> <https://www.wmo.int/pages/prog/www/IMOP/meetings/Upper-Air/Systems-Intercomp/Doc3-4(1)Vaisala.pdf> <http://www.wless.ru/files/Accessaries/Antenna/sl1200%20product%20spec%20v7_1210.pdf> ... -- Best wishes, Larry McDavid W6FUB Anahei

Re: [time-nuts] GPS Timing Antenna Failure - Long

ailure. If flux was the problem, I'd expect it to work poorly when first installed, or maybe decay slowly over time as something changed. ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts m

Re: [time-nuts] GPS Timing Antenna Failure - Long

have a schematic for the board or is the layout so simple that it is self evident once you look at the board? Stay tuned for film at 11 -DC de NR1DX manu...@artekmanuals.com On 5/12/2018 4:07 PM, Larry McDavid wrote: I recently had an unexpected failure of a white-conical-dome HP/Symmetricom

[time-nuts] GPS Timing Antenna Failure - Long

Reference (timing) antennas use a simple patch antenna instead of a quadrafilar antenna and that old solder flux residue will attenuate the even amplified GPS signal out of this antenna. I welcome your constructive comments. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los

Re: [time-nuts] Need a Watch Recommendation

sot P-touch as a retirement gift from IBM. Got the watch, as they say. I can say it is very accurate for a non-disciplined watch if you wear it every day -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyl

Re: [time-nuts] Fast Rise/Fall Time Pulser

datasheet. Why would you want to set the output level higher than that at which the risetime is fastest? ~ 1 vpp seems enough. Larry On 10/11/2017 8:29 AM, David DiGiacomo teli...@davmar.org [TekScopes] wrote: On Tue, Oct 10, 2017 at 11:01 PM, Larry McDavid <lmcda...@lmceng.com> w

Re: [time-nuts] [TekScopes] Fast Rise/Fall Time Pulser

hop/index.php?main_page=product_info=124_id=295 This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output is provided. Price is US$68. I've ordered one of these for testing. Is anyone here using one of these? -- Best wishes, Larry McDavid

[time-nuts] Fast Rise/Fall Time Pulser

295 This is built on a small PWB with integral BNC connector, powered by 5 vdc through a USB B connector; a trigger output is provided. Price is US$68. I've ordered one of these for testing. Is anyone here using one of these? -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, n

Re: [time-nuts] TAPR GPS Kits

for the shipping from him to you and he will be in touch when the plates are ready to ship. Thanks, Steve WB0DBS -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts

Re: [time-nuts] TAPR Oncore M12+ kit

quickly on a weekend afternoon. I mill keyed BNC and DBx connectors all the time. ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsu

Re: [time-nuts] HP E1938

ented at repurposing, will be able to think about this problem and come up with a simple solution to interfacing with these boards. No need to buy insert type connectors. I never had any trouble making cables that connected to these units using plain vanilla DB25's. Rick N6RK On 4/15/2017 10:42 AM,

Re: [time-nuts] HP E1938

en has all the connectors and power supplies, and GPS, etc. If any other time nuts have experience with each of these methods to obtain a E1938 oscillator, please let us know. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near

[time-nuts] UltrAtomic Clock

le reading it across a room! -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ 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] UCCM GPSDO

this "UCCM" designation. But, what is the origin of this term and is it valid? -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, g

[time-nuts] Lady Heather for Z3801A

Does Lady Heather software support the HP Z3801A GPSDO? I recently read that it supports "most GPS receivers" but I have not heard that it supports the Z3801A. It would be great if it can do this... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near

Re: [time-nuts] quartz thermometers

tever was having its temperature measured. ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailm

[time-nuts] Racal Option 04E OCXO

I have many pictures and complete schematics of the Racal 04E optional OCXO used in many Racal counters. Ask if interested. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list

Re: [time-nuts] LAST CALL for Symmetricom 58532A antennas

I bought two and the shipping was $12 within the US. Sent via the Samsung GALAXY S5 Original message From: Philip Pemberton Date: 01/18/2016 10:53 AM (GMT-08:00) To: Discussion of precise time and frequency measurement

Re: [time-nuts] FE 405/5680/5650 caution !!!!

and has 20 ps time resolution. In my case, it is desirable because it is a lot smaller than the 5370B and it has USB, GPIB and (best for me) Ethernet connectivity. The TimeLab software has drivers built in for the 53230A. Larry McDavid On 12/12/2015 10:43 AM, Bert Kehren via time-nuts wrote

Re: [time-nuts] PM6680 or 53131A for TimePod

https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Dipleidoscope

one second of GMT and performance telegraphed to Greenwich for checking) http://www.parliament.uk/about/living-heritage/building/palace/big-ben/building-clock-tower/building-great-clock ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland

Re: [time-nuts] Dipleidoscope

Hazi wrote: Hi, I am trying to get in touch with larry McDavid , I came across a I.E. Dent Dipleidoscope and I was wondering if he would give me some insight on it. I would be able to send some pictures if you would request. Thanks, Jim -- Best wishes

Re: [time-nuts] Dipleidoscope

esume you've googled and come up with the book by Dent on its use via google books? https://books.google.com/books?id=9QlbQAAJ=frontcover=gbs_ge_summary_r=0#v=onepage=false Brent On Mon, Nov 9, 2015 at 12:16 PM, James Hazi <jwh...@msn.com> wrote: > Hi,  I am trying to get in touch w

Re: [time-nuts] Dipleidoscope

amp; Company survives today and still produces custom clocks, spanning three centuries of clock making excellence. Alas, through personal correspondence, the Dent & Company today seems unaware of the Dent Dipleidoscope. Larry On 11/9/2015 9:16 AM, James Hazi wrote: Hi, I am trying to g

[time-nuts] Z3801A and FE-5680A Allen Variances

Would someone familiar with the facts please report the long-term Allen Variance of the HP Z3801A and the FE-5680A. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts

Re: [time-nuts] Racal Dana 1992 universal counter

and a special Air Force ATE standard. Mine came with the Air Force setting. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com

Re: [time-nuts] Setting Clocks in the Mid 1800's

://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html Sanjeev Gupta wrote: On Sat, Nov 1, 2014 at 11:23 AM, Larry McDavid lmcda...@lmceng.com wrote: I gave a presentation on the Dent Dipleidoscope at the Harvard conference of the North American Sundial Society in 2013. If anyone

[time-nuts] Setting Clocks in the Mid 1800's

to run with minute scheduling, accurate time became much more important! Best of all, the Dent Dipleidoscope is astonishingly easy to use! Larry McDavid NASS Sundial Registrar And, multiple HP Z3801A owner... times change! -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los

Re: [time-nuts] Magnetic Resonance Spectromater; was Re: Loran, GPS, Lightning, Timing

and follow the instructions there. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] Loran, GPS, Lightning, Timing

... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ 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] SatStat on Windows 7

I just tried to run SatStat for the HP Z3801A on my new Windows 7 64-bit computer and it reported it would not run under that OS. What are folks using? -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland

Re: [time-nuts] Looking for WWVB digital wall clock with digital 24 hour UTC display

years ago. Larry On 2/19/2014 3:52 PM, Richard (Rick) Karlquist wrote: Can anyone recommend a atomic wall clock that displays in digital 24 hour UTC? Looking for largest possible digits and LED preferred over LCD, under $100. Any brands to avoid? Rick ... -- Best wishes, Larry McDavid

Re: [time-nuts] Z3816A Control and Cleaning

not familiar with that abbreviation. Joe ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] Z3816A Control and Cleaning

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. -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland

Re: [time-nuts] Z3816A Control and Cleaning

WB4UIV ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Harvard, Time and the Dipleidoscope

. So, as Time Nuts, we can appreciate that time accuracy has come a long way in just 150 years! If you should happen to be in Cambridge for this event, do visit The Coop bookstore near the Harvard campus. It is an amazing, 5-story high place! Larry McDavid W6FUB On 11/12/2013 9:32 AM

Re: [time-nuts] WWVB new modulation scheme monograph

://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012) ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman

Re: [time-nuts] WWVB new modulation

scheme? Larry On 11/3/2012 4:32 PM, Charles P. Steinmetz wrote: This has probably already been posted more than once, but if anyone is still looking for a description of the new WWVB modulation scheme: http://tf.boulder.nist.gov/general/pdf/2651.pdf (Sept. 2012) ... -- Best wishes, Larry McDavid

Re: [time-nuts] Javad's J-Shield

: Page 19 - 30 in the latest edition of GPS World. http://editiondigital.net/publication/?i=125872 Interesting read.. ... -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time

Re: [time-nuts] Trimble Thunderbolt GPS Antenna

#150753929036 Datasheet http://antcom.com/productsheets/2G15A-XTB-1-N_D.pdf -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

[time-nuts] Z3801A Power Connector

I unexpectedly came into a small supply of the 3-pin Universal Mate-N-Lock connectors that plug into the power connector on the rear panel of the HP Z3801A GPSDO. If you need one of these and can't readily find it locally, contact me off-list. -- Best wishes, Larry McDavid W6FUB Anaheim, CA

[time-nuts] More Racal 9462 OCXO

and I'm only reporting the listing. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman

Re: [time-nuts] Distribution amp - Use a video amp unit ?

is easy to modify and I can greatly improve the specs by running it at +/- 15V rather then the +/-5V it now uses. So, my opinion: Video distribution amps can work but you'll be right on the edge of the spec'd limits all around. ... -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles

[time-nuts] Racal OCXO Option 04E

. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] TM 5680-0211 for 5680A series Rubidiums

of the 5680A series Technical Manual. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] Racal-Dana 1991 w. Option 4C - what is that ?

precision 10 MHz source. Option 04E provides the Racal 9462 and there are other ocxo versions, such as Option 04A, that offer better performance than 04C but not so good as Option 04E. Larry On 1/30/2012 9:24 AM, cfo wrote: On Fri, 20 Jan 2012 09:18:32 -0800, Larry McDavid wrote: One does

Re: [time-nuts] Racal-Dana 1991 w. Option 4C - what is that ?

, they have bases in .DE ... -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] My Racal-Dana 1992

and WWVB zero crossing as an ultimate frequency reference as well as detecting changes in the ionosphere. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Racal-Dana 1992 Startup -- GPIB!

... -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] Thunderbolt Supply

welcome your suggestions! Larry W6FUB On 2/14/2011 10:06 AM, ewkeh...@aol.com wrote: Yes I am doing it with some very low cost switchers off ebay, followed by linear regulators as I mentioned previously. Works great. Bert Kehren ... -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles

[time-nuts] Thunderbolt Supply

output. I'm asking if list members have a favorite power supply for this unit, why and where I can obtain one. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) ___ time-nuts mailing list -- time

Re: [time-nuts] Thunderbolt Supply

supply rather than a switching supply. I had a TBolt die while connected to a switching supply in an environment where there were frequent power outages. ... -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On Behalf Of Larry McDavid ... I'm