Re: [time-nuts] Yukon to make Daylight Saving Time permanent after final time change Sunday

GMT EVERYWHERE!! -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO  80301 USA phone: 303-417-1345  x110 email: david.vanh...@backcountryaccess.com  ___ time-nuts mailing list --

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

I remember opening up those military crystals and sanding them down with Ajax cleaner to raise the frequency or rubbing a little solder on the plate to lower it for CW transmitters. High school days.  -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H

Re: [time-nuts] USB over optical fiber

, but did you perhance try adding some clamp-on ferrite chokes to the cable? Dana On Fri, Dec 6, 2019 at 10:05 AM David Van Horn via time-nuts < time-nuts@lists.febo.com> wrote: > This is my backup plan: > https://industrialcomponent.com/opticis/opm210003.html > > The docs are a bit

Re: [time-nuts] USB over optical fiber

...@backcountryaccess.com  -Original Message- From: Scott McGrath Sent: Friday, December 6, 2019 6:29 AM To: David Van Horn Cc: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] USB over optical fiber Wow, cost cutting at work I have the corning one but its 3

Re: [time-nuts] USB over optical fiber

Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO  80301 USA phone: 303-417-1345  x110 email: david.vanh...@backcountryaccess.com  -Original Message- From: time-nuts On Behalf Of David Van Horn via time-nuts Sent: Thursday, December 5, 2019 6:15 AM To: Scott

Re: [time-nuts] USB over optical fiber

d Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO  80301 USA phone: 303-417-1345  x110 email: david.vanh...@backcountryaccess.com  -Original Message- From: Scott McGrath Sent: Friday, December 6, 2019 6:29 AM To: David Van Horn Cc: Discussion of pr

Re: [time-nuts] USB over optical fiber

McGrath Sent: Wednesday, December 4, 2019 9:16 PM To: Discussion of precise time and frequency measurement Cc: David Van Horn Subject: Re: [time-nuts] USB over optical fiber You may still have a problem, That said most of your noise power is going to come from your USB device itself

Re: [time-nuts] USB over optical fiber

I'm not too worried up there, my receivers are working at 457 kHz. -Original Message- From: Scott McGrath Sent: Wednesday, December 4, 2019 12:14 AM To: Discussion of precise time and frequency measurement Cc: David Van Horn Subject: Re: [time-nuts] USB over optical fiber Its

[time-nuts] USB over optical fiber

I suppose this is vaguely time-nutty.  I have an application where I need to take USB into an EMC faraday cage. I see a number of optical fiber implementations available, and the prices ($200-300) are acceptable, but I’m worried about noise that the downstream end may cause, since it will need

Re: [time-nuts] Most popular NMEA sentence with date and time?

We aren't going that time-nutty, but it's a fun project and running it from GPS sounded like fun. Thanks all, I have what I need. -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO  80301 USA phone: 303-417-1345  x110 email: 

[time-nuts] Most popular NMEA sentence with date and time?

I'm helping a friend with a hobby project, a "Countdown To Christmas" clock. I haven't looked at the NMEA docs in a while or three.. What's the most widely supported sentence(s) that will give me date and time? We're doing one Arduino to grab the data from GPS and talk to the others, which

Re: [time-nuts] The forbidden question

"Some people build giant laser interferometers, other people build large-scale particle accelerators, still other people build elaborate clocks. They are all looking for the same thing: a conversation with Mother Nature that begins with, "Hmm, that's funny," and ends in a Nobel acceptance

Re: [time-nuts] Bombe clock

Years ago, I wrote an "enigma machine" in Atmel AVR code, just for fun. I'd love to see the relevant details from the Bombe and write up a version in the AVR. From a room filling (and heating) contraption of relays and tubes to a tiny chip. -- David VanHorn Lead Hardware Engineer Backcountry

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.

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

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.

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] One of my Thunderbolts is 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, David Van H

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

Re: [time-nuts] XKCD on time

ontrol the millennial's ? 2) Could we outlaw solid state electronics (or at least custom IC's) and go back to vacuum tubes while we are at Dave On 9/28/2018 1:53 PM, Martin VE3OAT wrote: > I love GMT.  All of this UTC stuff is ... revisionist! > My cheque is in the mail. > ... Martin    VE3OAT >

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:

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

[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

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] 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