Re: [time-nuts] Rooftop antenna and splitter

-antenna-farm.jpg https://www.satsignal.eu/ntp/2019-01-08-1330-23b-GPS-antenna-farm.jpg and I have a simple outdoor L1 antenna & splitter too. Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blue

Re: [time-nuts] new R+S phase noise test set

You and me both!!! A serious attack of TEA! David -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of Didier Juges Sent: 11 April 2019 18:13 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] new R+S phase noise test

Re: [time-nuts] Spectracom 9189 no longer syncing after power cycle and WRNO? Anyone else have same issue?

Thanks Paul - that fixed it:  I moved the antenna to a really clear area and left it on for a few hours.  It then came back to life. Much appreciated. On 4/10/2019 5:56 PM, paul swed wrote: David Suggestion. See if you can upgrade the firmware if possible. Then turn on and let it run a long

[time-nuts] Spectracom 9189 no longer syncing after power cycle and WRNO? Anyone else have same issue?

ut if not I'll look to see what might have happened due to the power cycle. Thanks, David. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.

Re: [time-nuts] Garmin 18x GPS WNRO

it.  All were fine through the event.  I expected they would be as I had brought the GPS-35s through the last rollover.  I like Garmin.  I wish Trimble had put this feature in the Thunderbolt. David N1HAC On 4/8/19 10:03 AM, Tom Van Baak wrote: > Thanks to that Pulsar / Garmin thread some we

Re: [time-nuts] Garmin GPS12XL V3.51

I checked today the GPS12XL I have, and that came up with a date in August 99, before dying a few minutes later. Firmware 4.57. [] John John, I think my 12XL firmware 4.60 is OK. Perhaps you can update the firmware? Cheers, David -- SatSignal Software

Re: [time-nuts] Garmin GPS12XL V3.51

correct, but maybe that's stored data it's using? When it boots, it shows 4.60 (1966-2003) as the software, so perhaps you can update? Whether that fixes the issue I don't know Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu E

Re: [time-nuts] Looking for the hp Standard

t. But a search of older manuals, for equipment one does not own, often bears useful results. -- Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom. Registered in England and W

Re: [time-nuts] Your board off list

David We have a couple of your boards and repeatedly go back using them One thing for us all the music is at 5 MHz, result we have to multiply adding one more source for variance.5 and 1 MHz output are not important. Is there a relative easy way to convert to 5 MHz.Thank youBert Kehren

Re: [time-nuts] Accuracy/drift of Garmin GPS 16 HVS 1 PPS output under invalid fix conditions...

pplies just to its NTP serving function or to the PPS output as well. Worth asking http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=272 Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@bluey

[time-nuts] Ashtec Z12 GPS units for sale in UK

Ramco auction in UK has some Ashtec Z12 GPS units with L1/L2 choke ring antennae in their latest auction. Be warned these are probably 10V antennae. David ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http

[time-nuts] GN-GGB0710 GPS Antenna Mounting Thread

The bit of threaded tubing I found at the hardware store that fits perfectly is labeled: ProLine plumbing and heating products BN-750NLB 877250 Nipple (Niple) 1/4 inch x 1/4 inch x 6 inch MIP for installation instructions visit: www.bkproducts.com I was surprised by the 1/4 inch bit, as it seems

[time-nuts] GN-GGB0710 GPS Antenna Mounting Thread

FWIW I just poked around my shop and found something that fit perfectly. It was a 5/8 inch plumbing 'barb'. So I just went to to a big-box hardware store (Lowes) and went to the plumbing section. The sales person agreed with me that it seemed to be tapered and I found a nice 8 inch length of b

Re: [time-nuts] Spectracom 9189 password reset? Instructions in manual don't work :-(

the back of the unit should clear the passwords - it clearly does not! I'll post to the group should I find a solution - there is one other member who is after a fix too. With best regards David. On 2/10/2019 2:11 PM, Jason Rabel via time-nuts wrote: Thank you for everyone's suggest

Re: [time-nuts] Spectracom 9189 password reset? Instructions in manual don't work :-(

mpare against a commercial unit) operation of a cape and SD card image I am putting together (first PCBs arriving next week) for the Beaglebone - the plan being to have a low cost design available for anyone wanting their own NTP server (or just wants a GPS cape for their BB). David.

[time-nuts] Spectracom 9189 password reset? Instructions in manual don't work :-(

l, is that the unit never presents me with a "login" prompt - I have to enter "login" followed by username and password - or put another way, it boots and is already at user level login. Thanks for any help - it would be great to get this unit back u

Re: [time-nuts] Wanted manual Tracor 308A Rubidium Frequency Standard

On Thu, Feb 07, 2019 at 10:50:36AM +0100, Heinz Breuer via time-nuts wrote: > Hello, > I just bought an old Tracor 308A Rubidium Frequency Standard and would like a > manual for it. > > Either pdf or a paper manual is fine. I will of course pay for it. Shipping > would be to Germany. >

Re: [time-nuts] HP5065A on eBay WARNING

On Sun, 3 Feb 2019, 19:03 Hi, > > Wanted to warn about the 5065A that has now sold twice on eBay. (Jan 18 > and Feb 2) When it first listed I contacted the seller and told him the > optical unit was missing (A12) and he should not call it "fully > functional" Anyway he sold it for his asking price

Re: [time-nuts] Ublox F9P multi-band GPS receiver

This looks ideal to me: https://www.u-blox.com/sites/default/files/RCB-F9T_ProductSummary_%28UBX-18069985%29.pdf -Dustin == A candidate for a group buy? David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay

Re: [time-nuts] Ublox F9P multi-band GPS receiver

A competitor to the Tallysman antennas is Taoglas: https://www.taoglas.com/product-category/gps-glonass-gnss/l1-l2-l5-antennas/ 3.0 v, $77.47 direct https://cdn.taoglas.com/datasheets/AQHA.50.A.30.pdf Dave ___ time-nuts mailing list -- time-nuts@l

Re: [time-nuts] Ublox Neo M8T no output on TP2 question please?

David, Don't tap the time LEDs. For InCase series NEO-M8T TIME & RAW receiver board (https://www.csgshop.com/product.php?id_product=218), access to PPS is through the 12 pin JST SH socket, its harness or the breakout board it feeds. You can see the breakout board's labelled i

Re: [time-nuts] Ublox Neo M8T no output on TP2 question please?

vice, and yet no PPS time access! Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscri

Re: [time-nuts] Ublox Neo M8T no output on TP2 question please?

From: Chris Wilson Hello David, Thanks for the reply, it came froma recommended Lithuanian source, where others have no issues with similar devices. I e-mailed them re this but got no rely, sadly. Is there any way to interrogate it (not the suppliers ;)) to see if it's

Re: [time-nuts] Ublox Neo M8T no output on TP2 question please?

Best Regards, Chris Wilson. = Are you sure it's genuine ublox? There are many counterfeits about. Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co

[time-nuts] Thunderbolt Schematics?

I have a couple of thunderbolts that appear to have dead com ports. Is there a schematic available? I have another that is working, so I'm sure it's not the USB serial or cable ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] Portable Time Standard

Joe, Would a mobile phone with a good GPS clock meet your needs? Or does it need to be a stand-alone device? 73, David GM8ARV -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv

Re: [time-nuts] Misuse of word "decimate" (was Re: Short term 10MHz source)

an adequate term for improving precision.  Averaging is one form, but not inclusive. David N1HAC On 1/10/19 7:59 AM, Magnus Danielson wrote: > Peter, > > While the word derives back to the Roman times, today it is a > technical term for data-reduction being used in professional

Re: [time-nuts] VHF-UHF Frequency Calibrator

-- I share your concern as to how 11 GHz signals come from tube equipment with point to point wiring. I have a problem at work where a small tact switch is creating bursts of RF when it closes. The problem is caused by discharging the parasitic capacitance inside the switch. ___

[time-nuts] Free* 1 MHz oscillators from HP 5245L counters

Hi All, I have four 1 MHz OCXOs pulled from HP 5245L counters. I think I saved all of the important bits (oven, controller card, cables, AC transformer, etc.) *You can have them for the cost of shipping. (After you contact me I will box them up and see what either USPS or UPS will charge.) P

Re: [time-nuts] question about multi-way measurement

ut the Internet. I'll write to him about that! Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv ___ time-nuts mailing list -- time-nuts@lists.febo.com T

Re: [time-nuts] Short term 10MHz source

Just inside a window can work for a GPSDO.  One of our labs at Dartmouth has metallic-tinted windows, so for that we hang a little puck antenna just outside.  Not ideal, but it gets signal. David On 1/1/19 11:53 PM, Hal Murray wrote: >> I do realise that the long term stability of the

Re: [time-nuts] More ES100 WWVB Measurements

2100 seems optimistic! David N1HAC On 1/1/19 5:31 PM, Graham / KE9H wrote: >> Does anybody know how many other places use the same rules? What does > Canada do? > > https://en.wikipedia.org/wiki/Daylight_saving_time_by_country > > --- Graham > > == > > On Tue,

Re: [time-nuts] uBlox GPS Compendium

hat a good read! Thanks, Julien, for that. Wouldn't it be great if it were to be updated for all the changes since 2009? Happy Holidays! David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitte

[time-nuts] Phase noise comparison between mini GPS clock and Chinese BG7TBL GPSDO

s://www.ebay.co.uk/itm/123519078474 … miniGPS clock range is 400 Hz to 810 MHz, BG7TBL is 10MHz only" https://twitter.com/LeoBodnar/status/1075529001836400646 Can be up to 18 dB different. Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsig

Re: [time-nuts] Modern signal generators

> Coax is always a challenge because the shields leak. FSJ1-50 works for me. Maintaining ham VHF repeaters where I'm putting 100W up the pipe and looking for -114dBm at the receiver, I have had big improvements replacing even good coax with heliax and real silver/Teflon connectors. Of cou

Re: [time-nuts] simple phase finder

Be careful, shielding can lower the Q impressively due to parasitic capacitance. Winding more than about a third of the length results in flux lines not coupling to the outboard turns. Ferrite antennas are fascinating. https://en.tdk-electronics.tdk.com/download/2176996/8d0ef9c30ea64c62edc15b3a28

Re: [time-nuts] new WWVB BPSK dev board

For other reasons and other bands (650m), I am very interested in narrow band SDR, but I have not found a platform to get started on. -Original Message- From: time-nuts On Behalf Of Poul-Henning Kamp Sent: Tuesday, December 4, 2018 1:31 PM To: Discussion of precise time and frequency

Re: [time-nuts] new WWVB BPSK dev board

Maybe the link came through the list OK? On 12/4/18 11:16 PM, David G. McGaw wrote: > Sorry about that garbled link.  Blame Dartmouth's over-zealous IT. Just > look for "rtl-sdr direct sampling mode" at rtl-sdr dot com. > > > On 12/4/18 11:09 PM, David G. McGaw wrot

Re: [time-nuts] new WWVB BPSK dev board

Sorry about that garbled link.  Blame Dartmouth's over-zealous IT. Just look for "rtl-sdr direct sampling mode" at rtl-sdr dot com. On 12/4/18 11:09 PM, David G. McGaw wrote: > Actually, an RTL-SDR can because there is direct access to the ADC > available by soldering to i

Re: [time-nuts] new WWVB BPSK dev board

Any of the RSPs from SDRPlay will cover it and they are great units, starting at $109 US.  I am literally using an RSP1A right now. David N1AHC On 12/4/18 9:08 PM, W7SLS wrote: > Hello, > > Great discussion on this and other topics here. > > Just looked up the specs for t

Re: [time-nuts] new WWVB BPSK dev board

Actually, an RTL-SDR can because there is direct access to the ADC available by soldering to internal pads: www.rtl-sdr.com/rtl-sdr-direct-sampling-mode/  That will give you 8-bit, 14.4Msps. But as has also been said, a good sound card sampling 24 bits at 192kHz can be used. David N1HAC On

Re: [time-nuts] new WWVB BPSK dev board

successfully tested for lock in Brazil. Is there anyone in Australia want to give it a try? Perth is almost directly opposite Fort Collins. :-) David N1HAC On 12/4/18 2:00 PM, Hal Murray wrote: As was said, IRQ delay is +/-100 mS from the second edge, hardly what a Time-Nut is looking for

Re: [time-nuts] new WWVB BPSK dev board

As was said, IRQ delay is +/-100 mS from the second edge, hardly what a Time-Nut is looking for. David On 12/4/18 1:07 PM, Hal Murray wrote: >> The one thing I wish is that there were access to the synchronized analog >> signal and/or a 1PPS.  Even a top of the minute would be

Re: [time-nuts] new WWVB BPSK dev board

digital interface. 73, David N1HAC On 12/4/18 11:35 AM, Tim Shoppa wrote: > Thanks for the heads up Tom! I ordered one and if it comes before the end > of the year I may have some time over the holidays to do acquisition test > from Maryland and maybe some cross-comparison with GPS PPS. &g

Re: [time-nuts] TimeSource 2500

Have you tried checking/setting the modem control lines (RTS CTS DCD etc) it may need one or more to transmit. Dave On 21/11/2018 23:05, Dmitry Khorkin wrote: > Recently i purchased Symmetricom's Timesource 2500 PRS, but can't find a > way to communicate with it. > Tried both straight and nu

[time-nuts] Size of hex (?) screw in knobs of 5370B time-interval counter

the correct size. Dave, G8WRB. -- Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom. Registered in England and Wales as company number 08914892 https://www.kirkbymicrowave.co.uk/ Tel 01621

Re: [time-nuts] HP 58503B PSU replacement

On Wed, 14 Nov 2018, 18:14 Gerhard Hoffmann > > If more than one replacement unit does not work, then it is not > > improbable that the switcher needs a minimum load to start. > There is a minimum load specified on the 5 V rail, and someone wrote above that the GPS receiver does not meet that req

Re: [time-nuts] HP 58503B PSU replacement

On Thu, 8 Nov 2018 at 21:43, Dr. David Kirkby < drkir...@kirkbymicrowave.co.uk> wrote: > On Thu, 8 Nov 2018, 14:53 George Atkinson via time-nuts < > time-nuts@lists.febo.com wrote: > >> Last month I was at the UK “National” hamfest and in the flea market area >> a s

Re: [time-nuts] HP 58503B PSU replacement

hOn Fri, 9 Nov 2018, 13:49 George Atkinson via time-nuts < time-nuts@lists.febo.com wrote: > Hi Dave, > Thanks for the info. I've already built the analogue supply and it's > working fine. It's interesting that even that 55W supply is operating near > it's -15V limit with the 58503A and the minum

Re: [time-nuts] HP 58503B PSU replacement

On Thu, 8 Nov 2018, 14:53 George Atkinson via time-nuts < time-nuts@lists.febo.com wrote: > Last month I was at the UK “National” hamfest and in the flea market area > a seller had a HP 58503B for sale. It was missing the cover and power > supply (AC mains version)including mounting. However it wa

Re: [time-nuts] Racal Dana 9478 frequency distribution system with option 04B high stability oven (5x10^-10/day aging rate).

On Sun, 4 Nov 2018, 11:51 David C. Partridge FWIW it is trivial to modify these video distribution amps for 50 ohm > output - you just need to change the output resistors form 75 ohm to 50 ohm > on the board after the op-amp. > > David > Three was a discussion about the particular

Re: [time-nuts] Racal Dana 9478 frequency distribution system with option 04B high stability oven (5x10^-10/day aging rate).

FWIW it is trivial to modify these video distribution amps for 50 ohm output - you just need to change the output resistors form 75 ohm to 50 ohm on the board after the op-amp. David -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of Dr. David

[time-nuts] Racal Dana 9478 frequency distribution system with option 04B high stability oven (5x10^-10/day aging rate).

I want a distribution amplifier to distribute 10 MHz from an HP GPS receiver to various bits of test kit - spectrum analyzer, VNA, signal generators, HP 5370B time interval counters, signal generators etc. Currently I am using 75 ohm video amplifiers, but I suspect that is sub optimal. I also don't

[time-nuts] Fw: Helium and MEMS oscillators don;t mix well

Ok, one last try: >From AuntMinnie.com, free but subscrip[tion-based newslettter for clinical radiologists and related staff: November 1, 2018 -- A second imaging facility is reporting problems with Apple devices that appear to be related to the operation of the center's MRI scanner. Nearly 10 l

Re: [time-nuts] Helium and MEMS oscillators don;t mix well

Please pardon my usual incompetence posting to mailing lists... 2nd MRI center reports problems with Apple devices Aunt Minnie is a newsletter/site targeting clinical radiologists and technical staff. Dave

[time-nuts] Fwd: Delivery Status Notification (Failure)

2nd MRI center reports problems with Apple devices Aunt Minnie is a newsletter/site targeting clinical radiologists and technical staff. Dave ___ time-nuts mailing list -- tim

Re: [time-nuts] MEMS oscillators

What a hoot! I was an engineer for a company in the early 1970's (1972, 73, I think) where we used an Eidophor projector for a large arena crowd projecting the Indie 500 on a huge screen The arena held about 10,000. The technology didn't last for more than a few years as I recall. Dave W6TE -

Re: [time-nuts] How can I measure time-delay of a cable with HP 5370B time-interval counter?

On Mon, 29 Oct 2018 at 09:43, Tom Van Baak wrote: > David, > > Just to see if your setup is working: > > 1) Set the pulse generator to as fast a risetime as possible; ns or less. > Use a low pulse rate (100 Hz is fine). > Unfortunately, I don't have such a pulse gene

Re: [time-nuts] How can I measure time-delay of a cable with HP 5370B time-interval counter?

;s bad. If you need a cable checked, I can do it as I have 7S12 plugins. Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of Dr. David Kirkby Sent: 29 October 2018 00:50 To: time-nuts@lists.febo.com Subject: [time-nuts] How can I measure time-delay

[time-nuts] How can I measure time-delay of a cable with HP 5370B time-interval counter?

ied it with them locked to the same 10 MHz reference, but I somewhat doubt that is the cause of these issues. I must be missing something, but I'm not sure what it is. -- Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, A

Re: [time-nuts] Boulder / UC-Boulder JILA

Can't help you there, but be sure to swing by McGuckin Hardware. 😊 -Original Message- From: time-nuts On Behalf Of Eric Scace Sent: Tuesday, October 23, 2018 12:48 PM To: Time Nuts email list Subject: [time-nuts] Boulder / UC-Boulder JILA Hi all — Although I live in Boston at prese

Re: [time-nuts] Oscillators

Hi Bob, I'll be on vacation for the next two weeks and out of internet range part of the time. Please consider my earlier request at the appropriate time. Best regards, Dave Smith -Original Message- From: time-nuts On Behalf Of Bob Martin Sent: Wednesday, October 3, 2018 1:48 PM To:

Re: [time-nuts] Oscillators away

Hi Bob, Thanks for making these available to group members. I could make use of either of your Rb, 10 MHz., osc's (17 or 18). I am in need of a high stab osc for my Amateur Radio microwave rover station. These stabilize the Tx/Rx frequencies in the transverters. Best regards, Dave Smith W6TE

Re: [time-nuts] 10 MHz -> 16 MHz

Another chip to suggest that I have used is the Texas Instruments CDCE913 (and family).  Wide range of input and output frequencies. If you have a programmer, it has on-board EEPROM.  Otherwise, it programs through I2S. David N1HAC On 10/1/18 3:40 PM, Bob kb8tq wrote: > Hi > > If t

Re: [time-nuts] One of my Thunderbolts is drifting

s drifting Hi If one shows 38,000 ns error, it’s no longer locked. It may *think* it’s doing ok, but it most certainly is unlocked. What is the DAC voltage doing? ( in some cases the DAC takes a long time to get to a limit and trigger an error flag). Bob > On Oct 2, 2018, at 3:08 PM, D

Re: [time-nuts] One of my Thunderbolts is drifting

Nothing has been changed in the settings for weeks. Is that the only way? -Original Message- From: time-nuts On Behalf Of Mark Sims Sent: Tuesday, October 2, 2018 2:41 PM To: time-nuts@lists.febo.com Subject: [time-nuts] One of my Thunderbolts is drifting Try the !h keyboard command to

[time-nuts] One of my Thunderbolts is drifting

After several weeks of seeing the two sine waves solidly locked, now one of my TBs is drifting. Both instances of LH show six sattelites green, and discipline mode normal. One shows RMS 2nS, the other 38,000+ What's wrong here? ___ time-nuts mailing li

Re: [time-nuts] XKCD on time

to participate. 😊 -Original Message- From: time-nuts On Behalf Of Artek Manuals Sent: Friday, September 28, 2018 12:55 PM To: time-nuts@lists.febo.com >> skipp via time-nuts Subject: Re: [time-nuts] XKCD on time David 1) Before I make a donation what is your plan to contr

Re: [time-nuts] XKCD on time :)

When I am global dictator, we will all run on GMT and all time zones, summer time, DST and similar nonsense will be abolished. I am accepting campaign donations! 😊 -Original Message- From: time-nuts On Behalf Of Hal Murray Sent: Friday, September 28, 2018 2:59 AM To: time-nuts@lists.feb

Re: [time-nuts] A silly question ...

Even with a DSO, if you sync to the Thunderbolt output, you can watch the free running osc drift relative to the Thunderbolt. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_

Re: [time-nuts] A silly question ...

Correct. David N1HAC On 9/27/18 12:55 PM, Dave B via time-nuts wrote: > ... Because I'm sure I should be able to figure this out for myself! > > I have (as many of you do also) one of the venerable Trimble Thunderbolt > devices.  No problem with that.  All works fine, and

Re: [time-nuts] Looking for Motorola VP Oncore for HP 58503a

but a good GPSDO at a good price is: http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=301 and you can program the output frequency over a wide range. Takes up far less space and far less power. I'm using mine with my IC-R8600 receiver. Che

Re: [time-nuts] Chronverter truemodulator diagram trying again

I got both posts ... -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of paul swed Sent: 26 September 2018 15:05 To: Time-nuts Subject: [time-nuts] Chronverter truemodulator diagram trying again Hello to the group. seems it didn't post last night try

[time-nuts] A Monday morning smile

We brought up our second Thunderbolt last week. We use these to provide a standard frequency for all our test gear, and in our calibration process for production boards. One unit feeds engineering, and the other feeds production, with a spare unit on the shelf, so that if either the engineering

[time-nuts] Radio time station transmitter using the Raspberry Pi

rogram is useful if you have a clock that otherwise does not get any reception. Before running this program, make sure you follow your local laws with regard to restrictions on radio transmissions." Lists DCF77 WWVB MSF and JJY. Cheers, David -- SatSignal Software - Quality software for you

Re: [time-nuts] Lost GPS lock or 1PPS recently?

On Thu, Sep 06, 2018 at 06:35:23PM -0400, Scott McGrath wrote: > Actually we DID have a radio based system that provided sufficient accuracy > it was called eLORAN but it was killed by US politicians because they did not > want a much more inexpensive to operate system ???competing??? with GPS.

Re: [time-nuts] Lost GPS lock or 1PPS recently?

We just put up another GPS antenna for our backup thunderbolt, and now IT is blaming that for why our wifi is sluggish. And it happens whether the new antenna is even connected! https://www.kb6nu.com/theyll-do-it-every-time/ I should have known.. (KC6ETE here) __

Re: [time-nuts] Lost GPS lock or 1PPS recently?

On Tue, 4 Sep 2018, 18:35 John Sloan, wrote: > Folks: > > > > Yesterday (2018-09-03) afternoon (about 22:00UTC, 16:00MDT) I noticed one > of my three home-made GPS-disciplined NTP servers had lost its GPS lock. > After some forensics on my part, this (2018-09-04) morning (about 16:00UTC, > 10:00M

Re: [time-nuts] FTDI UT232R-200 USB to Serial Converter (BARGAIN ALERT)

Edgeports are wonderful boxes if you buy them on Ebay etc. I can usually grab an 8 port box for $50. They just work. VERY configurable. -Original Message- From: time-nuts On Behalf Of Gregory Beat via time-nuts Sent: Wednesday, September 5, 2018 11:12 AM To: time-nuts@lists.febo.com Cc

Re: [time-nuts] NIST

On Fri, Aug 31, 2018 at 10:23:14PM -0700, Hal Murray wrote: > > pla...@gmail.com said: > > Which satellites? Most are here: https://celestrak.com Tracking programs > > are abundant. > > I was thinking of geo-sync, but if position info is widely available then I > guess I should be interested

Re: [time-nuts] Lots of Off Topic discussion

I consider saving WWV/WWVH/WWVB to be ON topic.  They may not be as precise as some on this list like to achieve, but they are publicly available methods of time dissemination.  I am very concerned that factions of NIST consider that this should no longer be part of their mission. David

[time-nuts] Lots of Off Topic discussion

Guys, The noise level has risen rather high lately. I really think that discussions of jamming of GPS and other systems are not relevant. The loss of WWVx is also mostly OT as I don't believe that anyone seriously still uses it for a time/frequency reference these days. Dave ___

Re: [time-nuts] Fwd: Re: law and regulation applying to time.. was Re: OOPS on my wwv legal post

s the transmission of standard frequency and time signals by the transmitter DCF77 (Working Group 4.42)." DCF77 being the 77.5 kHz transmitter. Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitte

[time-nuts] UK: Annual maintenance: 3–21 September 2018

/products-and-services/time/msf-outages Question to time-nuts: could you manage with a daytime outage of WWVB for over two weeks? Haven't heard many UK folk complaining during previous maintenance periods. Cheers, David -- SatSignal Software - Quality software for you Web:

Re: [time-nuts] law and regulation applying to time.. was Re: OOPS on my wwv legal post

h would be £12/pound. When it comes to time (the subject of this list), I'm not sure where the UK stands legally. I will ask on the newgroup uk.legal.moderated https://groups.google.com/forum/#!forum/uk.legal.moderated which is visited by solicitors, students of law, and people wanting l

Re: [time-nuts] Cal standards, WWVB, etc. was Re: WWV and legal issues

actually in existence.  For those looking for that type of standard, it may be better to rely on the Navy VLF transmitters such as NAA on 24kHz.  Who knows, but I expect they are not up to be defunded. David N1HAC On 8/30/18 1:23 PM, jimlux wrote: On 8/30/18 8:15 AM, Mike Bafaro wrote: According

Re: [time-nuts] Petition to Maintain WWV, WWVH, WWVB

Unfortunately, this one is inaccurate.  It talks of impact to radio controlled "Atomic Clocks", but does not mention WWVB, only WWV and WWVH. David N1HAC On 8/24/18 3:51 PM, Adrian Godwin wrote: There seem to be 2 : https://na01.safelinks.protection.outlook.com/?url=h

Re: [time-nuts] History Channel "In Search of" Time Travel

interesting if this were also downloadable - YouTube or whatever. Cheers, David -- SatSignal Software - Quality software for you Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv ___ time-nuts mailing list -- time-nu

Re: [time-nuts] History Channel "In Search of" Time Travel

You're a movee star! -Original Message- From: time-nuts On Behalf Of Tom Van Baak Sent: Friday, August 17, 2018 2:08 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] History Channel "In Search of" Time Travel Check out History Channel tonight (Friday, Au

Re: [time-nuts] 1PPS for the beginner

://www.pbworks.com/ I have several there - easy to edit, and free. Didn't need to read a manual page at all. Hope it would be free for time-nuts too. Examples: http://funcubedongle.pbworks.com/ http://planeplotter.pbworks.com/ Cheers, David -- SatSignal Software - Quality software written to

Re: [time-nuts] NIST

unobtainability of spares such as the high-power valves, I understand. You're right that many devices rely on these LF transmissions, but so do many FM radios rely on analogue transmissions which are going, if not already partially gone, in Europe. Thanks, David GM8ARV -- SatSignal Software - Qu

Re: [time-nuts] Bicentennial GOES satellite clock

On Sun, Aug 12, 2018 at 07:48:52PM -0400, Bob kb8tq wrote: > Hi > > Well???. there???s also the solar flare that vaporizes the planet earth :) > > A flare big enough to take out all the sat systems would disrupt a lot more > than just navigation. > It also probably is big enough to take out HF

Re: [time-nuts] 10 MHz 'failover' switch?

Not quite what you are looking for, but I implemented a pair of thunderbolts with no common parts (dual antennas power etc) into a simple RF switch. The production manager flipped the switch on Mondays, and if either system wasn't working I had a third system in a box ready to replace. So for any

Re: [time-nuts] Alternatives for Thunderbolts

I'm looking for two more receivers to implement "Pair and a spare" redundancy for our engineering lab and production. Are these below compatible with Lady Heather? Any thoughts as to overall quality etc? Any other suggestions? [] David VanHorn Lead Ha

[time-nuts] Alternatives for Thunderbolts

2047675.c15.m1851 https://www.ebay.com/itm/GPSDO-Symmetricom-Inside-GPS-10MHz-1PPS-GPS-Disciplined-Clock-GPS-Ant-Display/112412375250?hash=item1a2c4cb8d2%3Ag%3AmokAAOSwPh5ZHrG4&_sacat=0&_nkw=trimble+thunderbolt&_from=R40&rt=nc&_trksid=p2047675.m570.l1313.TR2.TRC1.A0.H0.Xtrimb

Re: [time-nuts] Setting Time on WSPR Radio Transmitter

I have wondered if a slightly incorrect time on the phone might point to use of a "Stingray" or similar device. ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and fo

Re: [time-nuts] TNS-BUF order update

Parts availability is a bear at the moment. It appears that the MLCC makers got tired of racing to see who could make the least money, and they are discontinuing tons of low profitable parts. I have equivalents for most of my parts designated already, but we are having to reach into alternates fo

Re: [time-nuts] Setting Time on WSPR Radio Transmitter

"Exactly" on the time nuts list... 😊 ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___

Re: [time-nuts] GPS Antenna Grounding/Lightning protection.

About that "cone of protection" http://lightningsafety.com/nlsi_pls/cone-of-protection-myth.html -Original Message- From: time-nuts On Behalf Of Bill Hawkins Sent: Monday, June 18, 2018 3:16 PM To: o...@ozindfw.net; 'Discussion of precise time and frequency measurement' Subject: Re: [

Re: [time-nuts] Affordable PoE 6-digit time displays?

Thanks, all - sounds like either finding a cheap IRIG display or hacking up a pi/arduino/etc. version will be the path forward. The IRIG displays I can find quickly on ebay are still priced for people building music studios, so... RPi 3 B+ supports PoE with an extra hat, and you can get pi-powere

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